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Banerjee A, Yang Y, Wang MC, Vedantam A. Recovery Trajectories of Patient-reported Outcomes After Surgery for Degenerative Cervical Myelopathy: A Bayesian Latent Class Modeling Approach. Clin Spine Surg 2024:01933606-990000000-00333. [PMID: 39037072 DOI: 10.1097/bsd.0000000000001662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 06/28/2024] [Indexed: 07/23/2024]
Abstract
STUDY DESIGN Retrospective study. OBJECTIVE The aim of this study was to identify recovery trajectory clusters after surgery for degenerative cervical myelopathy (DCM), as well as to determine clinical and imaging characteristics associated with functional recovery trajectories. BACKGROUND Accurate prediction of postsurgical neurological recovery for the individual patient with DCM is challenging due to varying patterns of functional recovery. Latent class Bayesian models can model individual patient patterns and identify groups of patients with similar phenotypes for personalized prognostication. METHODS A prospective single-center study of 70 consecutive patients with DCM undergoing elective cervical spine decompression for DCM between 2010 and 2017 was performed. Outcomes were recorded using the modified Japanese Orthopedic Association (mJOA), Neck Disability Index (NDI), and the Short Form-36 Physical Component Score (SF-36 PCS) at 3, 6, 12, and 24 months. Recovery trajectories were constructed based on unsupervised Bayesian latent class modeling. Clinical and imaging predictors of recovery trajectories were also determined. RESULTS Recovery after surgery for DCM showed 3 distinct recovery trajectory clusters for each outcome. The commonest recovery trajectory was sustained improvement for the mJOA (41.1%), stagnation for the NDI (60.3%), and stability for the SF-36 PCS (46.6%). Age, duration of symptoms, and baseline disability were the strongest predictors of each recovery trajectory. Degree of cord compression, neck pain, and intramedullary T2-hyperintensity were predictive of NDI and SF-36 PCS but not mJOA recovery trajectory. Sex was associated with the NDI recovery trajectory but not SF-36 PCS and mJOA recovery trajectories. CONCLUSION Using prospective data and a data-driven approach, we identified 3 distinct recovery trajectory clusters and associated factors for mJOA, NDI, and SF-36 PCS in the first 24 months after surgery for DCM. Our results can enhance personalized clinical prognostication and guide patient expectations at different time points after surgery for DCM.
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Affiliation(s)
- Anjishnu Banerjee
- Division of Biostatistics, Institute for Health and Equity, Medical College of Wisconsin, Milwaukee, WI
| | - Yushan Yang
- Division of Biostatistics, Institute for Health and Equity, Medical College of Wisconsin, Milwaukee, WI
| | - Marjorie C Wang
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
| | - Aditya Vedantam
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI
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Takeda H, Michikawa T, Nagai S, Kawabata S, Ito K, Ikeda D, Fujita N, Kaneko S. Assessment of Surgical Outcomes in Patients with Degenerative Cervical Myelopathy Using the 25-Question Geriatric Locomotive Function Scale: A Longitudinal Observational Study. Spine Surg Relat Res 2024; 8:287-296. [PMID: 38868784 PMCID: PMC11165504 DOI: 10.22603/ssrr.2023-0191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 11/06/2023] [Indexed: 06/14/2024] Open
Abstract
Introduction Locomotive syndrome caused by degenerative musculoskeletal diseases is reported to improve with surgical treatment. However, it is unclear whether surgical treatment is effective for the locomotive syndrome developing in patients with degenerative cervical myelopathy (DCM). Thus, this study primarily aimed to longitudinally assess the change in locomotive syndrome stage before and after cervical spinal surgery for patients with DCM using the 25-question geriatric locomotive function scale (GLFS-25). A secondary objective was to identify factors associated with the postoperative improvement in the locomotive syndrome stage. Methods We retrospectively reviewed clinical data of patients undergoing cervical spine surgery at our institution from April 2020 to May 2022 who had answered the Japanese Orthopaedic Association Cervical Myelopathy Assessment Questionnaire, visual analog scale, and GLFS-25 preoperatively and at 6 months and 1 year postoperatively. We collected demographic data, medical history, preoperative radiographic parameters, presence or absence of posterior longitudinal ligament ossification, and surgical data. Results We enrolled 115 patients (78 men and 37 women) in the present study. Preoperatively, using the GLFS-25, 73.9% of patients had stage 3, 10.4% had stage 2, 9.6% had stage 1, 6.1% had no locomotive syndrome. The stage distribution of locomotive syndrome improved significantly at 6-months and 1-year postoperatively. The multivariable Poisson regression analysis revealed that better preoperative lower extremity function (relative risk: 3.0; 95% confidence interval: 1.01-8.8) was significantly associated with postoperative improvement in the locomotive syndrome stage. Conclusions This is the first study to longitudinally assess the locomotive syndrome stage in patients with DCM using GLFS-25. Our results indicated that patients with DCM experienced significant improvement in the locomotive syndrome stage following cervical spine surgery. Particularly, the preoperative lower extremity function was significant in postoperative improvement in the locomotive syndrome stage.
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Affiliation(s)
- Hiroki Takeda
- Department of Spine and Spinal Cord Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Takehiro Michikawa
- Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan
| | - Sota Nagai
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Soya Kawabata
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Kei Ito
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Daiki Ikeda
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Nobuyuki Fujita
- Department of Orthopaedic Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
| | - Shinjiro Kaneko
- Department of Spine and Spinal Cord Surgery, School of Medicine, Fujita Health University, Toyoake, Japan
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Khosravi S, Farahbakhsh F, Hesari M, Shahmohammadi A, Aliakbargolkar A, Baigi V, Eskandari Z, Ghodsi Z, Harrop J, Rahimi-Movaghar V, Ghodsi SM. Predictors of Outcome After Surgical Decompression for mild degenerative Cervical Myelopathy -A Systematic Review. Global Spine J 2024; 14:697-706. [PMID: 36912895 PMCID: PMC10802523 DOI: 10.1177/21925682231164346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/14/2023] Open
Abstract
STUDY DESIGN Systematic Reviews. OBJECTIVES To investigate predictors of surgical outcomes for mild Degenerative Cervical Myelopathy (DCM) by reviewing all related studies conducted at this point. METHODS An electronic search was carried out in PubMed, EMBASE, Scopus, and Web of Science until June 23, 2021. Full-text articles reporting surgical outcome predictors of mild DCM cases were eligible. We included studies with mild DCM which was defined as a modified Japanese Orthopaedic Association score of 15 to 17 or a Japanese Orthopaedic Association score of 13 to 16. Independent reviewers screened all the records, and discrepancies between the reviewers were solved in a session with the senior author. For risk of bias assessment, RoB 2 tool was used for randomized clinical trials and ROBINS-I for non-randomized studies. RESULTS After screening 6 087 manuscripts, only 8 studies met the inclusion criteria. Lower pre-operative mJOA scores and quality-of-life measurement scores were reported by multiple studies to predict better surgical outcomes compared to other groups. High-intensity pre-operative T2 magnetic resonance imaging (MRI) was also reported to predict poor outcomes. Neck pain before intervention resulted in improved patient-reported outcomes. Two studies also reported motor symptoms prior to surgery as outcome predictors. CONCLUSION Lower quality of life before surgery, neck pain, lower pre-operative mJOA scores, motor symptoms before surgery, female gender, gastrointestinal comorbidities, surgical procedure and surgeon's experience with specific techniques, and high signal intensity of cord in T2 MRI were the surgical outcome predictors reported in the literature. Lower Quality of Life (QoL) score and neck prior to surgery were reported as predictors of the more improved outcome, but high cord signal intensity in T2 MRI was reported as an unfavorable outcome predictor.
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Affiliation(s)
- Sepehr Khosravi
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzin Farahbakhsh
- Sports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Neurosurgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | - Alireza Aliakbargolkar
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Vali Baigi
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Eskandari
- Department of Management, Faculty of Social Sciences and Economics, Alzahra University, Tehran, Iran
| | - Zahra Ghodsi
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - James Harrop
- Department of Neurological and Orthopedic Surgery Chief, Division of Spine and Peripheral Nerve Surgery Director, Enterprise Neuroscience Quality and Safety Neurosurgery Director of Delaware Valley SCI Center, Thomas Jefferson University, Philadelphia, PA, USA
| | - Vafa Rahimi-Movaghar
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Department of Neurosurgery, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- Universal Scientific Education and Research Network (USERN), Tehran, Iran
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
- Visiting Professor, Spine Program, University of Toronto, Toronto, Canada
| | - Seyed Mohammad Ghodsi
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
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Ge Y, Zhao R, Guo X, Liang M, Xue Y. Systematic investigation of cerebellar functional alterations and their association with surgical outcomes in patients with degenerative cervical myelopathy: a resting-state fMRI study. LA RADIOLOGIA MEDICA 2024; 129:280-290. [PMID: 38302829 DOI: 10.1007/s11547-024-01776-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 01/03/2024] [Indexed: 02/03/2024]
Abstract
OBJECTIVE The aim of this study was to systematically investigate the changes in cerebellar neural activity and cerebellar-cortical functional connectivity (FC) in patients with degenerative cervical myelopathy (DCM) using resting-state functional magnetic resonance imaging (fMRI). METHODS In this study, we collected clinical data and resting-state fMRI data from 54 DCM patients and 50 healthy controls (HCs). We analyzed voxel-wise regional fMRI metrics, including amplitude of low frequency fluctuation (ALFF), fractional ALFF, regional homogeneity, functional connectivity density, and voxel-mirrored homotopic connectivity. In analysis 1, we examined the differences in regional fMRI metrics within the cerebellum between the DCM patient group and the healthy control group, as well as their correlation with preoperative neurological status and prognosis. In analysis 2, we investigated cerebellar-cortical functional connectivity differences between the two groups and their correlation with preoperative neurological status and prognosis. Lastly, in analysis 3, we explored the internetwork connectivity between the 'cerebellar-SMN' (sensorimotor network) system, examined the between-group differences, and investigated its correlation with preoperative neurological status and prognosis. RESULTS (1) Relative to HCs, DCM patients exhibited functional alterations in wide-spread cerebellar regions; (2) DCM patients exhibited altered cerebellar-cortical FC which was associated with the preoperative neurological status and prognosis; (3) DCM patients exhibited altered internetwork connectivity between 'cerebellar-SMN' system which was associated with duration of symptom. CONCLUSION Wide-spread cerebellar functional alterations occur in DCM pathogenesis and the deficits in cerebellar-SMN functional connectivity may be beneficial in future studies for predicting surgical outcomes in patients with DCM.
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Affiliation(s)
- Yuqi Ge
- Department of Orthopedics Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Rui Zhao
- Department of Orthopedics Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Xing Guo
- Department of Orthopedics, Cangzhou Central Hospital, Tianjin Medical University, Cangzhou, 061001, China
| | - Meng Liang
- School of Medical Imaging, Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University, Tianjin, 300203, China
- Department of Molecular Imaging and Nuclear Medicine, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Tianjin's Clinical Research Center for China, Tianjin, 300060, China
| | - Yuan Xue
- Department of Orthopedics Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.
- School of Medical Imaging, Tianjin Medical University, Tianjin, 300070, China.
- Tianjin Key Laboratory of Spine and Spinal Cord, Tianjin Medical University General Hospital, Tianjin, 300052, China.
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Malhotra AK, Shakil H, Harrington EM, Fehlings MG, Wilson JR, Witiw CD. Early surgery compared to nonoperative management for mild degenerative cervical myelopathy: a cost-utility analysis. Spine J 2024; 24:21-31. [PMID: 37302415 DOI: 10.1016/j.spinee.2023.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 05/10/2023] [Accepted: 06/03/2023] [Indexed: 06/13/2023]
Abstract
BACKGROUND CONTEXT Degenerative cervical myelopathy (DCM) is a form of acquired spinal cord compression and contributes to reduced quality of life secondary to neurological dysfunction and pain. There remains uncertainty regarding optimal management for individuals with mild myelopathy. Specifically, owing to lacking long-term natural history studies in this population, we do not know whether these individuals should be treated with initial surgery or observation. PURPOSE We sought to perform a cost-utility analysis to examine early surgery for mild degenerative cervical myelopathy from the healthcare payer perspective. STUDY DESIGN/SETTING We utilized data from the prospective observational cohorts included in the Cervical Spondylotic Myelopathy AO Spine International and North America studies to determine health related quality of life estimates and clinical myelopathy outcomes. PATIENT SAMPLE We recruited all patients that underwent surgery for DCM enrolled in the Cervical Spondylotic Myelopathy AO Spine International and North America studies between December 2005 and January 2011. OUTCOME MEASURES Clinical assessment measures were obtained using the Modified Japanese Orthopedic Association scale and health-related quality of life measures were obtained using the Short Form-6D utility score at baseline (preoperative), 6 months, 12 months and 24 months postsurgery. Cost measures inflated to January 2015 values were obtained using pooled estimates from the hospital payer perspective for surgical patients. METHODS We employed a Markov state transition model with Monte Carlo microsimulation using a lifetime horizon to obtain an incremental cost utility ratio associated with early surgery for mild myelopathy. Parameter uncertainty was assessed through deterministic means using one-way and two-way sensitivity analyses and probabilistically using parameter estimate distributions with microsimulation (10,000 trials). Costs and utilities were discounted at 3% per annum. RESULTS Initial surgery for mild degenerative cervical myelopathy was associated with an incremental lifetime increase of 1.26 quality-adjusted life years (QALY) compared to observation. The associated cost incurred to the healthcare payer over a lifetime horizon was $12,894.56, resulting in a lifetime incremental cost-utility ratio of $10,250.71/QALY. Utilizing a willingness to pay threshold in keeping with the World Health Organization definition of "very cost-effective" ($54,000 CDN), the probabilistic sensitivity analysis demonstrated that 100% of cases were cost-effective. CONCLUSIONS Surgery compared to initial observation for mild degenerative cervical myelopathy was cost-effective from the Canadian healthcare payer perspective and was associated with lifetime gains in health-related quality of life.
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Affiliation(s)
- Armaan K Malhotra
- Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College St, Toronto, Ontario, M5T 1P5, Canada; Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada; Institute of Health Policy Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, 155 College St, Toronto, Ontario, M5T 3M6, Canada
| | - Husain Shakil
- Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College St, Toronto, Ontario, M5T 1P5, Canada; Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada; Institute of Health Policy Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, 155 College St, Toronto, Ontario, M5T 3M6, Canada
| | - Erin M Harrington
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College St, Toronto, Ontario, M5T 1P5, Canada; Krembil Research Institute, Toronto Western Hospital, 60 Leonard Ave, Toronto, Ontario, M5T 0S8, Canada
| | - Jefferson R Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College St, Toronto, Ontario, M5T 1P5, Canada; Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada; Institute of Health Policy Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, 155 College St, Toronto, Ontario, M5T 3M6, Canada
| | - Christopher D Witiw
- Division of Neurosurgery, Department of Surgery, University of Toronto, 149 College St, Toronto, Ontario, M5T 1P5, Canada; Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond St, Toronto, Ontario, M5B 1W8, Canada; Institute of Health Policy Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, 155 College St, Toronto, Ontario, M5T 3M6, Canada.
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Inoue T, Soshi S, Yamamoto S, Saito M. Time course of symptomatic improvement after open-door laminoplasty for cervical spondylotic myelopathy. J Orthop Sci 2024; 29:42-48. [PMID: 36435725 DOI: 10.1016/j.jos.2022.10.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Postoperative outcomes following cervical spondylotic myelopathy (CSM) are excellent overall, but there are few prospective studies using patient-reported outcome measures that have explored how long improvement can be expected after surgery. The aim of this prospective study was to investigate from when and until when symptoms improve after open-door laminoplasty in patients with CSM and the factors that affect surgical outcomes. METHODS The subjects were 115 CSM patients who underwent laminoplasty. The Japanese Orthopaedic Association Cervical Myelopathy Evaluation Questionnaire (JOACMEQ) was used for longitudinal evaluation, and surveys on cervical spine function, upper extremity function, lower extremity function, bladder function, and quality of life were conducted before surgery and at 3, 6, 12, 18, and 24 months after surgery. The patients were classified into 'effective' and 'ineffective' groups based on the points obtained for each domain, and the factors affecting the outcome of surgery were examined by multivariate analysis. RESULTS JOACMEQ scores improved significantly at 3 months postoperatively compared to preoperatively for all four domains except cervical spine function, but there was no significant improvement after 3 months postoperatively. Multivariate analysis showed that the preoperative score (cervical spine function and upper extremity function) and the points obtained at 3 months postoperatively (upper and lower extremity function, bladder function, and quality of life) were the factors associated with membership of the effective group at 24 months postoperatively. CONCLUSIONS Although upper and lower extremity function, bladder function, and quality of life domains improved in the relatively early postoperative period, improvement after 3 months postoperatively was limited. The results suggest that the preoperative score and the superiority of the improvement obtained up to 3 months after surgery may be indicators of postoperative outcomes, and this may provide new insights into the selection of surgical indications and patient explanations.
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Affiliation(s)
- Takeshi Inoue
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan.
| | - Shigeru Soshi
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Shun Yamamoto
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Mitsuru Saito
- Department of Orthopaedic Surgery, The Jikei University School of Medicine, Tokyo, Japan
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Saunders LM, Sandhu HS, McBride L, Maniarasu VS, Taylor S, Dhokia R. Degenerative Cervical Myelopathy: An Overview. Cureus 2023; 15:e50387. [PMID: 38213348 PMCID: PMC10783125 DOI: 10.7759/cureus.50387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2023] [Indexed: 01/13/2024] Open
Abstract
Degenerative cervical myelopathy (DCM) is a spinal condition of growing importance due to its increasing prevalence within the ageing population. DCM involves the degeneration of the cervical spine due to various processes such as disc ageing, osteophyte formation, ligament hypertrophy or ossification, as well as coexisting congenital anomalies. This article provides an overview of the literature on DCM and considers areas of focus for future research. A patient with DCM can present with a variety of symptoms ranging from mild hand paraesthesia and loss of dexterity to a more severe presentation of gait disturbance and loss of bowel/bladder control. Hoffman's sign and the inverted brachioradialis reflex are also important signs of this disease. The gold standard imaging modality is MRI which can identify signs of degeneration of the cervical spine. Other modalities include dynamic MRI, myelography, and diffusion tensor imaging. One important scoring system to aid with the diagnosis and categorisation of the severity of DCM is the modified Japanese Orthopaedic Association score. This considers motor, sensory, and bowel/bladder dysfunction, and categorises patients into mild, moderate, or severe DCM. DCM is primarily treated with surgery as this can halt disease progression and may even allow for neurological recovery. The surgical approach will depend on the location of degeneration, the number of cervical levels involved and the pathophysiological process. Surgical approach options include anterior cervical discectomy and fusion, corpectomy, or posterior approach (laminectomy ± fusion). Conservative management is also considered for some patients with mild or non-progressive DCM or for patients where surgery is not an option. Conservative treatment may include physical therapy, traction, or neck immobilisation. Future recommendations include research into the prevalence rate of DCM and if there is a difference between populations. Further research on the benefit of conservative management for patients with mild or non-progressive DCM would be recommended.
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Affiliation(s)
- Laura M Saunders
- School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, GBR
| | - Hushil S Sandhu
- Department of Trauma and Orthopaedics, Royal Victoria Hospital, Belfast, GBR
| | - Lorcán McBride
- School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, GBR
| | | | - Samantha Taylor
- School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, GBR
| | - Rakesh Dhokia
- Department of Trauma and Orthopaedics, Royal Victoria Hospital, Belfast, GBR
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Shakil H, Santaguida C, Wilson JR, Farhadi HF, Levi AD, Wilcox JT. Pathophysiology and surgical decision-making in central cord syndrome and degenerative cervical myelopathy: correcting the somatotopic fallacy. Front Neurol 2023; 14:1276399. [PMID: 38046579 PMCID: PMC10690824 DOI: 10.3389/fneur.2023.1276399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/23/2023] [Indexed: 12/05/2023] Open
Abstract
Our understanding of Central Cord Syndrome (CCS), a form of incomplete spinal cord injury characterized by disproportionate upper extremity weakness, is evolving. Recent advances challenge the traditional somatotopic model of corticospinal tract organization within the spinal cord, suggesting that CCS is likely a diffuse injury rather than focal lesion. Diagnostic criteria for CCS lack consensus, and varied definitions impact patient identification and treatment. Evidence has mounted for early surgery for CCS, although significant variability persists in surgical timing preferences among practitioners. A demographic shift toward an aging population has increased the overlap between CCS and Degenerative Cervical Myelopathy (DCM). Understanding this intersection is crucial for comprehensive patient care. Assessment tools, including quantitative measures and objective evaluations, aid in distinguishing CCS from DCM. The treatment landscape for CCS in the context of pre-existing DCM is complex, requiring careful consideration of pre-existing neurologic injury, patient factors, and injury factors. This review synthesizes emerging evidence, outlines current guidelines in diagnosis and management, and emphasizes the need for ongoing research to refine our understanding and treatment strategies for this evolving patient population.
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Affiliation(s)
- Husain Shakil
- Division of Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada
| | - Carlo Santaguida
- McGill University Health Center, Montreal Neurological Institute-Hospital, McGill University, Montreal, QC, Canada
| | - Jefferson R. Wilson
- Division of Neurosurgery, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada
| | - H. Francis Farhadi
- Department of Neurosurgery, University of Kentucky, Lexington, KY, United States
| | - Allan D. Levi
- Department of Neurological Surgery, The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Jared T. Wilcox
- Department of Neurosurgery, University of Kentucky, Lexington, KY, United States
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Muralidharan A, Gong D, Piche JD, Al-Saidi N, Hey HWD, Aleem I. Multilevel Cervical Disk Arthroplasty: Moving Beyond Two Levels. Clin Spine Surg 2023; 36:363-368. [PMID: 37684714 DOI: 10.1097/bsd.0000000000001527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 08/10/2023] [Indexed: 09/10/2023]
Abstract
Cervical disk arthroplasty (CDA) is well-studied for 1-level and 2-level cervical pathology. There is an increasing trend towards its utilization for greater than 2-level disease as an alternative to the gold standard, anterior cervical discectomy and fusion (ACDF). The number of high-level, prospective studies or randomized trials regarding multilevel CDA is limited but continues to grow as the procedure gains popularity. In appropriately indicated patients with multilevel disease caused by disk herniations or spondylosis without extensive facet arthropathy, CDA shows promising results. Multilevel CDA should be avoided in patients with prior spinal trauma, significant degenerative spondylolisthesis with translation, arthrodesis without mobility, severely incompetent facet joints, ossification of the posterior longitudinal ligament, or kyphotic deformity. With overall similar risk profiles to ACDF but lower theoretical rates of pseudarthrosis and adjacent segment disease, multilevel CDA has been shown to preserve, or perhaps even increase, preoperative cervical range of motion. There are negligible differences in postoperative neck and arm pain, VAS scores, modified Japanese Orthopaedic Association scores, and Neck Disability Index scores when comparing multilevel CDA and ACDF. Despite current indications for multilevel CDA largely being based on single and 2-level data, careful patient selection is critical. Expansion of indications can be expected as literature continues to emerge regarding outcomes and complications in multilevel CDA, as well as with improvements in prosthesis design.
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Affiliation(s)
| | - Davin Gong
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI
| | - Joshua D Piche
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI
| | - Neil Al-Saidi
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI
| | | | - Ilyas Aleem
- Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, MI
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Sangeorzan I, Antonacci G, Martin A, Grodzinski B, Zipser CM, Murphy RKJ, Andriopoulou P, Cook CE, Anderson DB, Guest J, Furlan JC, Kotter MRN, Boerger TF, Sadler I, Roberts EA, Wood H, Fraser C, Fehlings MG, Kumar V, Jung J, Milligan J, Nouri A, Martin AR, Blizzard T, Vialle LR, Tetreault L, Kalsi-Ryan S, MacDowall A, Martin-Moore E, Burwood M, Wood L, Lalkhen A, Ito M, Wilson N, Treanor C, Dugan S, Davies BM. Toward Shared Decision-Making in Degenerative Cervical Myelopathy: Protocol for a Mixed Methods Study. JMIR Res Protoc 2023; 12:e46809. [PMID: 37812472 PMCID: PMC10594151 DOI: 10.2196/46809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 10/10/2023] Open
Abstract
BACKGROUND Health care decisions are a critical determinant in the evolution of chronic illness. In shared decision-making (SDM), patients and clinicians work collaboratively to reach evidence-based health decisions that align with individual circumstances, values, and preferences. This personalized approach to clinical care likely has substantial benefits in the oversight of degenerative cervical myelopathy (DCM), a type of nontraumatic spinal cord injury. Its chronicity, heterogeneous clinical presentation, complex management, and variable disease course engenders an imperative for a patient-centric approach that accounts for each patient's unique needs and priorities. Inadequate patient knowledge about the condition and an incomplete understanding of the critical decision points that arise during the course of care currently hinder the fruitful participation of health care providers and patients in SDM. This study protocol presents the rationale for deploying SDM for DCM and delineates the groundwork required to achieve this. OBJECTIVE The study's primary outcome is the development of a comprehensive checklist to be implemented upon diagnosis that provides patients with essential information necessary to support their informed decision-making. This is known as a core information set (CIS). The secondary outcome is the creation of a detailed process map that provides a diagrammatic representation of the global care workflows and cognitive processes involved in DCM care. Characterizing the critical decision points along a patient's journey will allow for an effective exploration of SDM tools for routine clinical practice to enhance patient-centered care and improve clinical outcomes. METHODS Both CISs and process maps are coproduced iteratively through a collaborative process involving the input and consensus of key stakeholders. This will be facilitated by Myelopathy.org, a global DCM charity, through its Research Objectives and Common Data Elements for Degenerative Cervical Myelopathy community. To develop the CIS, a 3-round, web-based Delphi process will be used, starting with a baseline list of information items derived from a recent scoping review of educational materials in DCM, patient interviews, and a qualitative survey of professionals. A priori criteria for achieving consensus are specified. The process map will be developed iteratively using semistructured interviews with patients and professionals and validated by key stakeholders. RESULTS Recruitment for the Delphi consensus study began in April 2023. The pilot-testing of process map interview participants started simultaneously, with the formulation of an initial baseline map underway. CONCLUSIONS This protocol marks the first attempt to provide a starting point for investigating SDM in DCM. The primary work centers on developing an educational tool for use in diagnosis to enable enhanced onward decision-making. The wider objective is to aid stakeholders in developing SDM tools by identifying critical decision junctures in DCM care. Through these approaches, we aim to provide an exhaustive launchpad for formulating SDM tools in the wider DCM community. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID) DERR1-10.2196/46809.
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Affiliation(s)
| | - Grazia Antonacci
- Department of Primary Care and Public Health, National Institute of Health Research (NIHR) Applied Research Collaboration (ARC) Northwest London, Imperial College London, London, United Kingdom
- Centre for Health Economics and Policy Innovation (CHEPI), Business School, Imperial College London, London, United Kingdom
| | - Anne Martin
- Faculty of Medicine, Health and Social Care, Canterbury Christ Church University, Canterbury, United Kingdom
| | - Ben Grodzinski
- University Hospitals Sussex, NHS Foundation Trust, Brighton, United Kingdom
| | - Carl M Zipser
- Spinal Cord Injury Center, Balgrist University Hospital, Zurich, Switzerland
| | - Rory K J Murphy
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Panoraia Andriopoulou
- Psychology Department, School of Social Sciences, University of Ioannina, Ioannina, Greece
| | - Chad E Cook
- Division of Physical Therapy, School of Medicine, Duke University, Durham, CA, United States
- Department of Orthopaedics, School of Medicine, Duke University, Durham, CA, United States
- Department of Population Health Sciences, School of Medicine, Duke University, Durham, CA, United States
- Duke Clinical Research Institute, Duke University, Durham, CA, United States
| | - David B Anderson
- Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - James Guest
- The Miami Project to Cure Paralysis, The Miller School of Medicine, University of Miami, Miami, FL, United States
| | - Julio C Furlan
- Division of Physical Medicine and Rehabilitation, Department of Medicine, University of Toronto, Toronto, ON, Canada
- The KITE Research Institute, Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada
| | - Mark R N Kotter
- Myelopathy.org, Cambridge, United Kingdom
- Department of Clinical Neurosurgery, University of Cambridge, Cambridge, United Kingdom
| | - Timothy F Boerger
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States
| | | | | | - Helen Wood
- Myelopathy.org, Cambridge, United Kingdom
| | - Christine Fraser
- Department of Health Sciences, University of Stirling, Scotland, United Kingdom
- Physiotherapy Department, National Health Service Lothian, Edinburgh, United Kingdom
| | - Michael G Fehlings
- Division of Neurosurgery and Spine Program, Department of Surgery, University of Toronto, Toronto, ON, Canada
- Division of Neurosurgery, Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Vishal Kumar
- Department of Orthopaedics, Postgraduate Institute of Medical Education and Research, Chandigarh, India
- Department of Orthopaedics, All India Institute of Medical Sciences, Deoghar, India
| | - Josephine Jung
- Institute of Psychiatry, Psychology & Neuroscience, King's College, London, United Kingdom
- Department of Neurosurgery, King's College Hospital, London, United Kingdom
| | - James Milligan
- Department of Family Medicine, McMaster University, Hamilton, ON, Canada
| | - Aria Nouri
- Division of Neurosurgery, Geneva University Hospitals, University of Geneva, Geneva, Switzerland
| | - Allan R Martin
- Department of Neurological Surgery, University of California, Davis, Davis, CA, United States
| | | | - Luiz Roberto Vialle
- School of Medicine, Pontifical Catholic University of Paraná, Curitiba, Brazil
| | - Lindsay Tetreault
- Department of Neurology, New York University, New York, NY, United States
| | - Sukhvinder Kalsi-Ryan
- The KITE Research Institute, Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Anna MacDowall
- Department of Surgical Sciences, Uppsala University and Department of Orthopaedics, The Academic Hospital of Uppsala, Uppsala, Sweden
| | | | | | - Lianne Wood
- Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom
- NeuroSpinal Assessment Unit, Nottingham University Hospitals NHS Trust, Nottingham, United Kingdom
| | - Abdul Lalkhen
- Northern Care Alliance, Salford Royal NHS Foundation Trust, Manchester, United Kingdom
| | - Manabu Ito
- Department of Orthopaedic Surgery, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
| | - Nicky Wilson
- Physiotherapy Department, King's College Hospital NHS Foundation Trust, London, United Kingdom
| | - Caroline Treanor
- Department of Physiotherapy, Beaumont Hospital, Dublin, Ireland
- Department of Neurosurgery, Beaumont Hospital, Dublin, Ireland
- School of Physiotherapy, Royal College of Surgeons in Ireland, Dublin, Ireland
| | | | - Benjamin M Davies
- Myelopathy.org, Cambridge, United Kingdom
- Department of Clinical Neurosurgery, University of Cambridge, Cambridge, United Kingdom
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11
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Tachibana N, Doi T, Nakajima K, Nakamoto H, Miyahara J, Nagata K, Nakarai H, Tozawa K, Ohtomo N, Sakamoto R, Kato S, Taniguchi Y, Matsubayashi Y, Tanaka S, Oshima Y. Does Surgical Treatment Affect the Degree of Anxiety or Depression in Patients With Degenerative Cervical Myelopathy? Global Spine J 2023; 13:2479-2487. [PMID: 35349781 PMCID: PMC10538321 DOI: 10.1177/21925682221088549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVES Preoperative mental state has been reported as one of the factors affecting the surgical outcomes of spine surgery, but few studies have examined in detail how patients' mental state is affected by spine surgery. The purpose of this study was to investigate using the Hospital Anxiety and Depression Scale (HADS) whether surgery improves preoperative depression and anxiety in patients with degenerative cervical myelopathy. METHODS We investigated patient-reported outcomes (Mental Component Summary, Physical Component Summary of SF-12 Health Survey, and EQ-5D, Neck Disability Index, JOACMEQ, satisfaction with treatment) and HADS one year after surgery, comparing them before and after surgery between April 2017 and February 2020. Among the cases diagnosed as preoperative anxiety and depression, we additionally compared the patient-reported outcomes based on the presence or absence of postoperative improvement in mental state, having also investigated the correlation between patient-reported outcomes and HADS for sub-analysis. RESULTS Among the 99 patients eligible for inclusion in the present study, we found that patient-reported outcomes and the HADS scores improved significantly after surgery. There was a moderate correlation between the amount of change in HADS-D score before and after surgery and the amount of change in NDI (moderate, r = .41), NRS of neck (moderate, r = .46), and JOACMEQ (cervical spine function; moderate, r = .43, upper extremity function; moderate, r = .41, QOL; moderate, r = .41). CONCLUSIONS We found that surgical treatment for patients with degenerative cervical myelopathy may improve postoperative anxiety and depression as well as other patient-reported outcomes.
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Affiliation(s)
- Naohiro Tachibana
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toru Doi
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Koji Nakajima
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideki Nakamoto
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Junya Miyahara
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kosei Nagata
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hiroyuki Nakarai
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Keiichiro Tozawa
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nozomu Ohtomo
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Ryuji Sakamoto
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - So Kato
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuki Taniguchi
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Matsubayashi
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yasushi Oshima
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, Tokyo, Japan
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12
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Acharya S, Khanna V, Chahal RS, Kalra KL, Vishwakarma G. Clinicoradiological Risk Factors Associated with Inability to Achieve Minimum Clinically Important Difference in Operated Cases of Cervical Spondylotic Myelopathy. Asian Spine J 2023; 17:904-915. [PMID: 37463661 PMCID: PMC10622822 DOI: 10.31616/asj.2022.0446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/23/2023] [Accepted: 05/27/2023] [Indexed: 07/20/2023] Open
Abstract
STUDY DESIGN This is a retrospective cohort study. PURPOSE This study aimed to identify the clinicoradiological risk factors associated with the inability to achieve minimum clinically important difference (MCID) on the modified Japanese Orthopaedic Association (mJOA) Scale in operated cases of cervical spondylotic myelopathy (CSM). OVERVIEW OF LITERATURE Only a few studies have evaluated the outcomes of surgery performed for CSM using MCID on the mJOA scale. METHODS We analyzed 124 operated CSM cases from March 2019 to April 2021 for preoperative clinical features, cervical sagittal radiographic parameters, and magnetic resonance imaging (MRI) signal intensities (SI). The risk factors associated with missing the MCID (poor outcome) on mJOA at the final follow-up were identified using binary logistic regression. Multivariate analysis was used to find significant risk factors, and odds ratios (OR) were computed. RESULTS A total of 110 men (89.2%) and 14 women (10.8%) with an average age of 53.5±13.2 years were included in the analysis. During the last follow-up, 89 cases (72.1%) achieved MCID (meaningful gains following surgery) while 35 (27.9%) could not. The final model identified the following parameters as significant risk factors for poor outcome: increased duration of symptoms (OR, 6.77; p=0.001), lower preoperative mJOA scale (OR, 0.75; p=0.029), the presence of multilevel T2-weighted (T2W) MRI SI (OR, 4.79; p=0.004), and larger change in cervical sagittal vertical axis (ΔcSVA) (OR, 1.06; p=0.013). Also, an increase in cSVA postoperatively correlated with a reduced functional recovery rate (r=-0.4, p<0.001). CONCLUSIONS Surgery for CSM leads to significant functional benefits. However, poorer outcomes are observed in cases of greater duration of symptoms, higher preoperative severity with multilevel T2W MRI SI, and a larger increase in the postoperative cSVA (sagittal imbalance).
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Affiliation(s)
- Shankar Acharya
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi,
India
| | - Varun Khanna
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi,
India
| | | | - Kashmiri Lal Kalra
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi,
India
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13
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Levy HA, Karamian BA, Adams AJ, Mao JZ, Canseco JA, Mandel J, Gebeyehu TF, Harlamova D, Bhatt SD, Heinle J, Kaye ID, Woods BI, Hilibrand AS, Kepler CK, Vaccaro AR, Schroeder GD. The Impact of Preoperative Symptom Duration on Patient Outcomes After Posterior Cervical Decompression and Fusion. Global Spine J 2023; 13:2463-2470. [PMID: 35324359 PMCID: PMC10538330 DOI: 10.1177/21925682221087735] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective Cohort Study. OBJECTIVES To determine if decreased preoperative symptom duration is associated with greater clinical improvement in function and myelopathic symptoms after posterior cervical decompression and fusion (PCDF). METHODS All patients over age 18 who underwent primary PCDF for cervical myelopathy or myeloradiculopathy at a single institution between 2014 and 2020 were retrospectively identified. Patient demographics, surgical characteristics, duration of symptoms, and preoperative and postoperative patient reported outcomes measures (PROMs) including modified Japanese Orthopaedic Association (mJOA), Neck Disability Index (NDI), Visual Analogue Scale (VAS) Neck, VAS Arm, and SF-12 were collected. Univariate and multivariate analyses were performed to compare change in PROMs and minimum clinically important difference achievement (%MCID) between symptom duration groups (< 6 months, 6 months-2 years, > 2 years). RESULTS Preoperative symptom duration groups differed significantly by sex and smoking status. Patients with < 6 months of preoperative symptoms improved significantly in all PROMs. Patients with 6 months-2 years of preoperative symptoms did not improve significantly in mJOA, Physical Component Scores (PCS), or NDI. Patients with > 2 years of symptoms failed to demonstrate significant improvement in mJOA, NDI, or Mental Component Scores (MCS). Univariate analysis demonstrated significantly decreased improvement in mJOA with longer symptom durations. Increased preoperative symptom duration trended toward decreased %MCID for mJOA and MCS. Regression analysis demonstrated that preoperative symptom duration of > 2 years relative to < 6 months predicted decreased improvement in mJOA and NDI and decreased MCID achievement for mJOA and MCS. CONCLUSION Increased duration of preoperative symptoms (> 2 years) before undergoing PCDF was associated with decreased postoperative improvement in myelopathic symptoms.
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Affiliation(s)
- Hannah A. Levy
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Brian A. Karamian
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Alexander J. Adams
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jennifer Z. Mao
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jose A. Canseco
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jenna Mandel
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Teleale F. Gebeyehu
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Daria Harlamova
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Shivangi D. Bhatt
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Jeremy Heinle
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - I. David Kaye
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Barrett I. Woods
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Alan S. Hilibrand
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Christopher K. Kepler
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Alexander R. Vaccaro
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
| | - Gregory D. Schroeder
- Department of Orthopaedic Surgery, Rothman Institute, Thomas Jefferson University, Philadelphia, PA, USA
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14
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Acharya S, Khanna V, Kalra KL, Chahal RS. Influence of Preoperative Sagittal Alignment on Functional Recovery in Operated Cases of Cervical Spondylotic Myelopathy. Asian J Neurosurg 2023; 18:293-300. [PMID: 37397040 PMCID: PMC10310444 DOI: 10.1055/s-0043-1768597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023] Open
Abstract
Objective We examine the influence of preoperative cervical sagittal curvature (lordotic or nonlordotic) on the functional recovery of surgically managed cases of cervical spondylotic myelopathy (CSM). The impact of sagittal alignment on the functional improvement of operated CSM cases has not been thoroughly investigated. Materials and Methods We did retrospective analysis of consecutively operated cases of CSM from March 2019 to April 2021. Patients were grouped into two categories: lordotic curvature (with Cobb angle > 10 degrees) and nonlordotic curvature (including neutral [Cobb angle 0-10 degrees] and kyphotic [Cobb angle < 0 degrees]). Demographic data, and preoperative and postoperative functional outcome scores (modified Japanese Orthopaedic Association [mJOA] and Nurick grade) were analyzed for dependency on preoperative curvature, and correlations between outcomes and sagittal parameters were assessed. Results In the analysis of 124 cases, 63.1% (78 cases) were lordotic (mean Cobb angle of 23.57 ± 9.1 degrees; 11-50 degrees) and 36.9% (46 cases) were nonlordotic (mean Cobb angle of 0.89 ± 6.5 degrees; -11 to 10 degrees), 32 cases (24.6%) had neutral alignment, and 14 cases (12.3%) had kyphotic alignment. At the final follow-up, the mean change in mJOA score, Nurick grade, and functional recovery rate (mJOArr) were not significantly different between the lordotic and nonlordotic group. In the nonlordotic group, cases with anterior surgery had a significantly better mJOArr than those with posterior surgery ( p = 0.04), whereas there was similar improvement with either approach in lordotic cases. In the nonlordotic group, patients who gained lordosis (78.1%) had better recovery rates than those who had lost lordosis (21.9%). However, this difference was not statistically significant. Conclusion We report noninferiority of the functional outcome in the cases with preoperative nonlordotic alignment when compared with those with lordotic alignment. Further, nonlordotic patients who were approached anteriorly fared better than those approached posteriorly. Although increasing sagittal imbalance in nonlordotic spines portend toward higher preoperative disability, gain in lordosis in such cases may improve results. We recommend further studies with larger nonlordotic subjects to elucidate the impact of sagittal alignment on functional outcome.
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Affiliation(s)
- Shankar Acharya
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi, India
| | - Varun Khanna
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi, India
| | - Kashmiri Lal Kalra
- Department of Ortho-Spine Surgery, Sir Ganga Ram Hospital, New Delhi, India
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15
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Fudo T, Hashida R, Yokosuka K, Sato K, Hiraoka K. Changes of improvement in upper limb function predict surgical outcome after laminoplasty in 1 year in patients with cervical spondylotic myelopathy: a retrospective study. J Orthop Surg Res 2023; 18:323. [PMID: 37101171 PMCID: PMC10131369 DOI: 10.1186/s13018-023-03805-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/18/2023] [Indexed: 04/28/2023] Open
Abstract
BACKGROUND Cervical spondylotic myelopathy preoperative prognostic factors include age, preoperative severity, and disease duration. However, there are no reports on the relationship between changes in physical function during hospitalization and postoperative course, and in recent years, the length of hospital stay has shortened. We aimed to investigate whether changes in physical function during hospitalization can predict the postoperative outcome. METHODS We recruited 104 patients who underwent laminoplasty for cervical spondylotic myelopathy by the same surgeon. Physical functions, including Simple Test for Evaluating Hand Function (STEF), grip strength, timed up and go test, 10-m walk, and time to stand on one leg, were assessed at admission and discharge. Patients with the Japanese Orthopaedic Association (JOA) score improvement rate of 50% or more were defined as the improved group. Decision tree analysis was investigated factor for identifying improvement in the JOA score. According to this analysis, we divided into two groups using age. Then, we conducted a logistic regression analysis to identify factors that improve the JOA score. RESULTS The improved and non-improved groups had 31 and 73 patients, respectively. The improved group was younger (p = 0.003) and had better improved Δgrip strength (p = 0.001) and ΔSTEF (p < .0007). Age was significantly positively correlated with disease duration (r = 0.4881, p = < .001). Disease duration exhibited a significant negative correlation with the JOA score improvement rate (r = - 0.2127, p = 0.031). Based on the decision tree analysis results, age was the first branching variable, with 15% of patients ≥ 67 years showing JOA score improvement. This was followed by ΔSTEF as the second branching factor. ΔSTEF was selected as the factor associated with JOA improvement in patients ≥ 67 years (odds ratio (OR) 0.95, 95% confidence interval (CI) 0.90-0.99, p = .047); in patients < 67 years, Δgrip strength was identified (OR 0.53, CI 0.33‒0.85, p = .0086). CONCLUSIONS In the improved group, upper limb function improved more than lower limb function from the early postoperative period. Upper limb function changes during hospitalization were associated with outcomes one year postoperatively. Improvement factors in upper extremity function differed by age, with changes in grip strength in patients < 67 years and STEF in patients ≥ 67 years, reflecting the outcome at one year postoperatively.
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Affiliation(s)
- Takuma Fudo
- Department of Orthopaedics, Kurume University, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
| | - Ryuki Hashida
- Department of Orthopaedics, Kurume University, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
- Division of Rehabilitation, Kurume University Hospital, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan.
| | - Kimiaki Yokosuka
- Department of Orthopaedics, Kurume University, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
| | - Kimiaki Sato
- Department of Orthopaedics, Kurume University, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
| | - Koji Hiraoka
- Department of Orthopaedics, Kurume University, 67 Asahi-machi, Kurume, Fukuoka, 830-0011, Japan
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16
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Davies B, Mowforth OD, Yordanov S, Alvarez-Berdugo D, Bond S, Nodale M, Kareclas P, Whitehead L, Bishop J, Chandran S, Lamb S, Bacon M, Papadopoulos MC, Starkey M, Sadler I, Smith L, Kalsi-Ryan S, Carpenter A, Trivedi RA, Wilby M, Choi D, Wilkinson IB, Fehlings MG, Hutchinson PJ, Kotter MRN. Targeting patient recovery priorities in degenerative cervical myelopathy: design and rationale for the RECEDE-Myelopathy trial-study protocol. BMJ Open 2023; 13:e061294. [PMID: 36882259 PMCID: PMC10008337 DOI: 10.1136/bmjopen-2022-061294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/09/2023] Open
Abstract
INTRODUCTION Degenerative cervical myelopathy (DCM) is a common and disabling condition of symptomatic cervical spinal cord compression secondary to degenerative changes in spinal structures leading to a mechanical stress injury of the spinal cord. RECEDE-Myelopathy aims to test the disease-modulating activity of the phosphodiesterase 3/phosphodiesterase 4 inhibitor Ibudilast as an adjuvant to surgical decompression in DCM. METHODS AND ANALYSIS RECEDE-Myelopathy is a multicentre, double-blind, randomised, placebo-controlled trial. Participants will be randomised to receive either 60-100 mg Ibudilast or placebo starting within 10 weeks prior to surgery and continuing for 24 weeks after surgery for a maximum of 34 weeks. Adults with DCM, who have a modified Japanese Orthopaedic Association (mJOA) score 8-14 inclusive and are scheduled for their first decompressive surgery are eligible for inclusion. The coprimary endpoints are pain measured on a visual analogue scale and physical function measured by the mJOA score at 6 months after surgery. Clinical assessments will be undertaken preoperatively, postoperatively and 3, 6 and 12 months after surgery. We hypothesise that adjuvant therapy with Ibudilast leads to a meaningful and additional improvement in either pain or function, as compared with standard routine care. STUDY DESIGN Clinical trial protocol V.2.2 October 2020. ETHICS AND DISSEMINATION Ethical approval has been obtained from HRA-Wales.The results will be presented at an international and national scientific conferences and in a peer-reviewed journals. TRIAL REGISTRATION NUMBER ISRCTN Number: ISRCTN16682024.
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Affiliation(s)
- Benjamin Davies
- Department of Neurosurgery, Cambridge University, Cambridge, UK
| | | | - Stefan Yordanov
- Department of Neurosurgery, Cambridge University, Cambridge, UK
| | | | - Simon Bond
- Cambridge Clinical Trials Unit, Cambridge University Hospital, Cambridge, UK
| | - Marianna Nodale
- Cambridge Clinical Trials Unit, Cambridge University Hospital, Cambridge, UK
| | - Paula Kareclas
- Cambridge Clinical Trials Unit, Cambridge University Hospital, Cambridge, UK
| | - Lynne Whitehead
- Pharmacy Department, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Jon Bishop
- Medical Statistician, NIHR Surgical Reconstruction and Microbiology Research Centre, Birmingham, UK
| | - Siddharthan Chandran
- Edinburgh Medical School & Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Sarah Lamb
- Institute of Health Research, University of Exeter, Exeter, UK
| | - Mark Bacon
- International Spinal Research Trust, London, UK
| | | | | | | | | | | | - Adrian Carpenter
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Rikin A Trivedi
- Department of Neurosurgery, Cambridge University, Cambridge, UK
| | - Martin Wilby
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust, Liverpool, UK
| | - David Choi
- Department of Neurosurgery, National Hospital for Neurology and Neurosurgery, London, UK
| | - Ian B Wilkinson
- Cambridge Clinical Trials Unit, Cambridge University Hospital, Cambridge, UK
| | - Michael G Fehlings
- Department of Surgery, Toronto Western Hospital and University of Toronto, Toronto, Ontario, Canada
| | | | - Mark R N Kotter
- Department of Neurosurgery, Cambridge University, Cambridge, UK
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Tu TH, Wang CY, Chen YC, Wu JC. Multilevel cervical disc arthroplasty: a review of optimal surgical management and future directions. J Neurosurg Spine 2023; 38:372-381. [PMID: 36681966 DOI: 10.3171/2022.11.spine22880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/04/2022] [Indexed: 12/23/2022]
Abstract
OBJECTIVE Cervical disc arthroplasty (CDA) has been recognized as a popular option for cervical radiculopathy or myelopathy caused by disc problems that require surgery. There have been prospective randomized controlled trials comparing CDA to anterior cervical discectomy and fusion (ACDF) for 1- and 2-level disc herniations. However, the indications for CDA have been extended beyond the strict criteria of these clinical trials after widespread real-world experiences in the past decade. This article provides a bibliometric analysis with a review of the literature to understand the current trends of clinical practice and research on CDA. METHODS The PubMed database was searched using the keywords pertaining to CDA in human studies that were published before August 2022. Analyses of the bibliometrics, including the types of papers, levels of evidence, countries, and the number of disc levels involved were conducted. Moreover, a systematic review of the contents with the emphasis on the current practice of multilevel CDA and complex cervical disc problems was performed. RESULTS A total of 957 articles published during the span of 22 years were analyzed. Nearly one-quarter of the articles (232, 24.2%) were categorized as level I evidence, and 33.0% were categorized as levels I or II. These studies clearly demonstrated the viability and effectiveness of CDA regarding clinical and radiological outcomes, including neurological improvement, maintenance, and preservation of segmental mobility with relatively low risks for several years postoperation. Also, there have been more papers published during the last decade focusing on multilevel CDA and fewer involving the comparison of ACDF. Overall, there was a clustering of CDA papers published from the US and East Asian countries. Based on substantial clinical data of CDA for 1- and 2-level disc diseases, the practice and research of CDA show a trend toward multilevel and complex disease conditions. CONCLUSIONS CDA is an established surgical management procedure for 1- and 2-level cervical disc herniation and spondylosis. The success of motion preservation by CDA-with low rates of complications-has outscored ACDF in patients without deformity. For more than 2-level disc diseases, the surgery shows a trend toward multiple CDA or hybrid ACDF-CDA according to individual evaluation for each level of degeneration.
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Affiliation(s)
- Tsung-Hsi Tu
- 1Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- 3School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; and
| | - Ching-Ying Wang
- 1Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- 3School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; and
| | - Yu-Chun Chen
- 2Department of Family Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- 3School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; and
- 4Big Data Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jau-Ching Wu
- 1Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- 3School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan; and
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18
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Alizadeh B, Alibabaei A, Ahmadi S, Maroufi SF, Ghafouri-Fard S, Nateghinia S. Designing predictive models for appraisal of outcome of neurosurgery patients using machine learning-based techniques. INTERDISCIPLINARY NEUROSURGERY 2023. [DOI: 10.1016/j.inat.2022.101658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
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19
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Xu N, Tian Y, Yue L, Yan M, Hung KL, Hou X, Li W, Wang S. Clinical and Surgical Characteristics of Patients with Atlantoaxial Dislocation in the Setting of "Sandwich Fusion": A Case-Control Study. J Bone Joint Surg Am 2023; 105:771-778. [PMID: 36827380 DOI: 10.2106/jbjs.22.01004] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
BACKGROUND Patients with "sandwich" fusion (concomitant C1 occipitalization and C2-C3 nonsegmentation), a subtype of Klippel-Feil syndrome, are at particular risk for developing atlantoaxial dislocation (AAD). However, the clinical and surgical characteristics of AAD in patients with sandwich fusion have not been clearly defined. METHODS A retrospective case-control study with a large sample size and a minimum 2-year follow-up was performed. From 2000 to 2018, 253 patients with sandwich AAD underwent a surgical procedure; these patients constituted the case group, and a matching number of patients with non-sandwich AAD were randomly selected to form the control group. Clinical data from electronic medical records and various imaging studies were analyzed and compared. The Japanese Orthopaedic Association (JOA) scale was used to evaluate neurological function. RESULTS Patients with sandwich AAD, compared with patients with non-sandwich AAD, had symptom onset at a younger age (34.8 compared with 42.8 years; p < 0.001) and had a higher likelihood for myelopathy (87.4% compared with 74.7%; p < 0.001). Patients with sandwich AAD had a higher incidence of lower cranial nerve palsy (7.9% compared with 0.0%; p < 0.001), a lower preoperative JOA score (13.4 compared with 14.2; p < 0.001), and higher incidences of accompanying Type-I Chiari malformation (20.9% compared with 1.2%; p < 0.001) and syringomyelia (21.3% compared with 1.6%; p < 0.001). Finally, patients with sandwich AAD had higher likelihoods of undergoing transoral release (28.5% compared with 5.1%; p < 0.001) and use of salvage fixation techniques (34.4% compared with 6.3%; p < 0.001), and had lower postoperative results for the JOA score (14.9 compared with 15.9; p < 0.001) and improvement rate (43.8% compared with 58.2%; p < 0.001). CONCLUSIONS Patients with sandwich AAD demonstrated distinct clinical manifestations. Versatility involving the use of various internal fixation techniques and transoral release procedures was frequently required in the surgical management of these patients, and meticulous and personalized preoperative planning would be of paramount importance. LEVEL OF EVIDENCE Prognostic Level III. See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Nanfang Xu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, People's Republic of China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, People's Republic of China
| | - Yinglun Tian
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, People's Republic of China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, People's Republic of China
| | - Lihao Yue
- Peking University Health Science Center, Beijing, People's Republic of China
| | - Ming Yan
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, People's Republic of China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, People's Republic of China
| | - Kan-Lin Hung
- Peking University Health Science Center, Beijing, People's Republic of China
| | - Xiangyu Hou
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China
| | - Weishi Li
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, People's Republic of China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, People's Republic of China
| | - Shenglin Wang
- Department of Orthopaedics, Peking University Third Hospital, Beijing, People's Republic of China.,Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, People's Republic of China.,Beijing Key Laboratory of Spinal Disease Research, Beijing, People's Republic of China
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20
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Evaniew N, Coyle M, Rampersaud YR, Bailey CS, Jacobs WB, Cadotte DW, Thomas KC, Attabib N, Paquet J, Nataraj A, Christie SD, Weber MH, Phan P, Charest-Morin R, Fisher CG, Hall H, McIntosh G, Dea N. Timing of Recovery After Surgery for Patients With Degenerative Cervical Myelopathy: An Observational Study From the Canadian Spine Outcomes and Research Network. Neurosurgery 2023; 92:271-282. [PMID: 36637265 DOI: 10.1227/neu.0000000000002213] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 08/31/2022] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND The time course over which postoperative neurological recovery occurs after surgery for degenerative cervical myelopathy occurs is poorly understood. OBJECTIVE To determine the time point at which patients experience significant neurological improvement. METHODS We reviewed data from an ongoing prospective multicenter cohort study. We measured neurological function at 3 months, 1 year, and 2 years after surgery using the modified Japanese Orthopedic Association (mJOA) scale. We implemented minimal clinical important differences (MCIDs) to guide interpretation of mJOA scores, and we used 1-way analysis of variance to compare changes between follow-up intervals. RESULTS Among 330 patients, the mean overall mJOA improved from 12.9 (SD 2.6) to 14.6 (SD 2.4) at 3 months, 14.7 (SD 2.4) at 1 year, and 14.8 (SD 2.5) at 2 years. The difference in means was statistically significant (P < .01) at the interval from baseline to 3 months postoperatively, but not from 3 months to 1 year or 1 year to 2 years. The MCID was reached by 161 patients at 3 months, 32 more at 1 year, and 15 more at 2 years, with a statistically significant difference only at 3 months. Patients with moderate or severe disease reached the MCID more frequently than those with mild disease. CONCLUSION Among patients who underwent surgery for degenerative cervical myelopathy, most significant neurological improvement occurred by 3 months after surgery. These findings will facilitate valid discussions about postoperative expectations during shared clinical decision making between patients and their surgeons.
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Affiliation(s)
- Nathan Evaniew
- Spine Program, University of Calgary, Calgary, Alberta, Canada
| | - Matthew Coyle
- Spine Program, University of Calgary, Calgary, Alberta, Canada
| | - Y Raja Rampersaud
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Christopher S Bailey
- London Health Science Centre Combined Orthopaedic and Neurosurgery Spine Program, Schulich School of Medicine, Western University, London, Ontario, Canada
| | | | - David W Cadotte
- Spine Program, University of Calgary, Calgary, Alberta, Canada
| | | | | | - Jérôme Paquet
- Department of Surgery, Université Laval, Québec, Québec, Canada
| | - Andrew Nataraj
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| | - Sean D Christie
- Department of Surgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Michael H Weber
- Division of Orthopaedics, McGill University, Montreal, Quebec, Canada
| | - Philippe Phan
- Division of Orthopaedic Surgery, University of Ottawa, Ottawa, Ontario, Canada
| | - Raphaële Charest-Morin
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Charles G Fisher
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Hamilton Hall
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | | | - Nicolas Dea
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
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21
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Javeed S, Greenberg JK, Plog B, Zhang JK, Yahanda AT, Dibble CF, Khalifeh JM, Ruiz-Cardozo M, Lavadi RS, Molina CA, Santiago P, Agarwal N, Pennicooke BH, Ray WZ. Clinically meaningful improvement in disabilities of arm, shoulder, and hand (DASH) following cervical spine surgery. Spine J 2023; 23:832-840. [PMID: 36708927 DOI: 10.1016/j.spinee.2023.01.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 12/24/2022] [Accepted: 01/18/2023] [Indexed: 01/27/2023]
Abstract
BACKGROUND CONTEXT Patients with cervical spine disease suffer from upper limb disability. At present, no clinical benchmarks exist for clinically meaningful change in the upper limb function following cervical spine surgery. PURPOSE Primary: to establish clinically meaningful metrics; the minimal clinically important difference (MCID) and substantial clinical benefit (SCB) of upper limb functional improvement in patients following cervical spine surgery. Secondary: to identify the prognostic factors of MCID and SCB of upper limb function following cervical spine surgery. STUDY DESIGN Retrospective cohort study. PATIENT SAMPLE Adult patients ≥18 years of age who underwent cervical spine surgery from 2012 to 2016. OUTCOME MEASURES Patient-reported outcomes: Neck disability index (NDI) and Disabilities of Arm, Shoulder, and Hand (DASH). METHODS MCID was defined as minimal improvement and SCB as substantial improvement in the DASH score at last follow-up. The anchor-based methods (ROC analyses) defined optimal MCID and SCB thresholds with area under curve (AUC) in discriminating improved vs. non-improved patients. The MCID was also calculated by distribution-based methods: half standard-deviation (0.5-SD) and standard error of the mean (SEM) method. A multivariable logistic regression evaluated the impact of baseline factors in achieving the MCID and SCB in DASH following cervical spine surgery. RESULTS Between 2012 and 2016, 1,046 patients with average age of 57±11.3 years, 53% males, underwent cervical spine surgery. Using the ROC analysis, the threshold for MCID was -8 points with AUC of 0.73 (95% CI: 0.67-0.79) and the SCB was -18 points with AUC of 0.88 (95% confidence interval [CI]: 0.85-0.91). The MCID was -11 points by 0.5-SD and -12 points by SEM-method. On multivariable analysis, patients with myelopathy had lower odds of achieving MCID and SCB, whereas older patients and those with ≥6 months duration of symptoms had lower odds of achieving DASH MCID and SCB respectively. CONCLUSIONS In patients undergoing cervical spine surgery, MCID of -8 points and SCB of -18 points in DASH improvement may be considered clinically significant. These metrics may enable evaluation of minimal and substantial improvement in the upper extremity function following cervical spine surgery.
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Affiliation(s)
- Saad Javeed
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Jacob K Greenberg
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Benjamin Plog
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Justin K Zhang
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Alexander T Yahanda
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | | | - Jawad M Khalifeh
- Department of Neurological Surgery, Johns Hopkins University, Baltimore, MD, USA
| | - Miguel Ruiz-Cardozo
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Raj S Lavadi
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Camilo A Molina
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Paul Santiago
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | - Nitin Agarwal
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA
| | | | - Wilson Z Ray
- Department of Neurological Surgery, Washington University, St. Louis, MO, USA.
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22
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Vedantam A, Purushothaman Y, Harinathan B, Scripp S, Budde MD, Yoganandan N. Spinal Cord Stress After Anterior Cervical Diskectomy and Fusion: Results from a Patient-Specific Finite Element Model. Ann Biomed Eng 2022; 51:1040-1051. [PMID: 36538274 DOI: 10.1007/s10439-022-03118-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022]
Abstract
Degenerative cervical myelopathy (DCM) is the commonest cause of cervical spinal cord dysfunction in older adults and is characterized by spinal cord compression and stress during neck motion. Although surgical decompression eliminates static spinal cord compression, cord stress resulting from flexion-extension motion of the spinal column has not been determined for single and multi-level surgical interventions. The effect of surgery on spinal cord stress is expected to change with the number of surgical levels as well as patient-specific anatomy. Using a MRI-derived patient-specific finite element model, we simulated 1-, 2- and 3-level anterior cervical diskectomy and fusion (ACDF) surgery for DCM. A substantial decrease in spinal cord stress at the level of spinal cord decompression was noted in all simulations. This was associated with a considerable increase in spinal cord stress rostral to the surgical level, and the magnitude of stress was higher in multi-level surgery. Increased spinal cord stress at the rostral adjacent segment correlated with increased segmental range of motion (r = 0.69, p = 0.002) and disk pressure (r = 0.57, p = 0.05). Together, these results indicate that ACDF for DCM is associated with adverse spinal cord stress patterns adjacent to the fusion construct, and further research is needed to determine if the altered stress is associated with clinical outcomes after surgery for DCM.
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23
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Siller S, Pannenbaecker L, Tonn JC, Zausinger S. Unilateral Approaches for Posterior Spinal Canal Decompression in Cervical Spondylotic Myelopathy—An Evaluation of Conceptual Feasibility. Oper Neurosurg (Hagerstown) 2022; 23:431-438. [DOI: 10.1227/ons.0000000000000364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 05/24/2022] [Indexed: 11/07/2022] Open
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24
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Jayasekera D, Zhang JK, Blum J, Jakes R, Sun P, Javeed S, Greenberg JK, Song SK, Ray WZ. Analysis of combined clinical and diffusion basis spectrum imaging metrics to predict the outcome of chronic cervical spondylotic myelopathy following cervical decompression surgery. J Neurosurg Spine 2022; 37:588-598. [PMID: 35523255 PMCID: PMC10629375 DOI: 10.3171/2022.3.spine2294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 03/24/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Cervical spondylotic myelopathy (CSM) is the most common cause of chronic spinal cord injury, a significant public health problem. Diffusion tensor imaging (DTI) is a neuroimaging technique widely used to assess CNS tissue pathology and is increasingly used in CSM. However, DTI lacks the needed accuracy, precision, and recall to image pathologies of spinal cord injury as the disease progresses. Thus, the authors used diffusion basis spectrum imaging (DBSI) to delineate white matter injury more accurately in the setting of spinal cord compression. It was hypothesized that the profiles of multiple DBSI metrics can serve as imaging outcome predictors to accurately predict a patient's response to therapy and his or her long-term prognosis. This hypothesis was tested by using DBSI metrics as input features in a support vector machine (SVM) algorithm. METHODS Fifty patients with CSM and 20 healthy controls were recruited to receive diffusion-weighted MRI examinations. All spinal cord white matter was identified as the region of interest (ROI). DBSI and DTI metrics were extracted from all voxels in the ROI and the median value of each patient was used in analyses. An SVM with optimized hyperparameters was trained using clinical and imaging metrics separately and collectively to predict patient outcomes. Patient outcomes were determined by calculating changes between pre- and postoperative modified Japanese Orthopaedic Association (mJOA) scale scores. RESULTS Accuracy, precision, recall, and F1 score were reported for each SVM iteration. The highest performance was observed when a combination of clinical and DBSI metrics was used to train an SVM. When assessing patient outcomes using mJOA scale scores, the SVM trained with clinical and DBSI metrics achieved accuracy and an area under the curve of 88.1% and 0.95, compared with 66.7% and 0.65, respectively, when clinical and DTI metrics were used together. CONCLUSIONS The accuracy and efficacy of the SVM incorporating clinical and DBSI metrics show promise for clinical applications in predicting patient outcomes. These results suggest that DBSI metrics, along with the clinical presentation, could serve as a surrogate in prognosticating outcomes of patients with CSM.
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Affiliation(s)
- Dinal Jayasekera
- Department of Biomedical Engineering, Washington University in St. Louis McKelvey School of Engineering, St. Louis
| | - Justin K. Zhang
- Department of Neurosurgery, Washington University School of Medicine, St. Louis
| | - Jacob Blum
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Rachel Jakes
- Department of Biomedical Engineering, Case School of Engineering, Cleveland, Ohio
| | - Peng Sun
- Department of Imaging Physics, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Saad Javeed
- Department of Neurosurgery, Washington University School of Medicine, St. Louis
| | - Jacob K. Greenberg
- Department of Neurosurgery, Washington University School of Medicine, St. Louis
| | - Sheng-Kwei Song
- Department of Radiology, Washington University School of Medicine, St. Louis, Missouri
| | - Wilson Z. Ray
- Department of Biomedical Engineering, Washington University in St. Louis McKelvey School of Engineering, St. Louis
- Department of Neurosurgery, Washington University School of Medicine, St. Louis
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25
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Rodrigues-Pinto R, Montenegro TS, Davies BM, Kato S, Kawaguchi Y, Ito M, Zileli M, Kwon BK, Fehlings MG, Koljonen PA, Kurpad SN, Guest JD, Aarabi B, Rahimi-Movaghar V, Wilson JR, Kotter MRN, Harrop JS. Optimizing the Application of Surgery for Degenerative Cervical Myelopathy [AO Spine RECODE-DCM Research Priority Number 10]. Global Spine J 2022; 12:147S-158S. [PMID: 35174733 PMCID: PMC8859702 DOI: 10.1177/21925682211062494] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
STUDY DESIGN Literature Review (Narrative). OBJECTIVE To introduce the number 10 research priority for Degenerative Cervical Myelopathy: Individualizing Surgery. METHODS This article summarizes the current recommendations and indications for surgery, including how known prognostic factors such as injury time, age, disease severity, and associated comorbidities impact surgical outcome. It also considers key areas of uncertainty that should be the focus of future research. RESULTS While a small proportion of conservatively managed patients may remain stable, the majority will deteriorate over time. To date, surgical decompression is the mainstay of treatment, able to halt disease progression and improve neurologic function and quality of life for most patients. Whilst this recognition has led to recommendations on when to offer surgery, there remain many uncertainties including the type of surgery, or timing in milder and/or asymptomatic cases. Their clarification has the potential to transform outcomes, by ensuring surgery offers each individual its maximum benefit. CONCLUSION Developing the evidence to better guide surgical decision-making at the individual patient level is a research priority for Degenerative Cervical Myelopathy.
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Affiliation(s)
- Ricardo Rodrigues-Pinto
- Spinal Unit (UVM), Department of Orthopaedics, Centro Hospitalar Universitário do Porto - Hospital de Santo António, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Porto, Portugal
| | - Thiago S. Montenegro
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, USA
| | | | - So Kato
- Department of Orthopaedic Surgery, The University of Tokyo, Tokyo, Japan
| | | | - Manabu Ito
- Department of Orthopaedic Surgery, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan
| | - Mehmet Zileli
- Neurosurgery Department, Ege University, Bornova, Izmir, Turkey
| | - Brian K. Kwon
- Vancouver Spine Surgery Institute, Department of Orthopedics, The University of British Columbia, Vancouver, BC, Canada
| | - Michael G. Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, ON, Canada
| | - Paul A. Koljonen
- Department of Orthopaedics and Traumatology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - Shekar N. Kurpad
- Department of Neurosurgery, Medical College of Wisconsin, Wauwatosa, WI, USA
| | - James D. Guest
- Department of Neurosurgery and The Miami Project to Cure Paralysis, The Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Bizhan Aarabi
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Vafa Rahimi-Movaghar
- Department of Neurosurgery, Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Iran
| | - Jefferson R. Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, ON, Canada
| | | | - James S. Harrop
- Department of Neurological Surgery, Thomas Jefferson University, Philadelphia, PA, USA
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26
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Machine Learning Approach in Predicting Clinically Significant Improvements After Surgery in Patients with Cervical Ossification of the Posterior Longitudinal Ligament. Spine (Phila Pa 1976) 2021; 46:1683-1689. [PMID: 34027925 DOI: 10.1097/brs.0000000000004125] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN A retrospective analysis of prospectively collected data. OBJECTIVE This study aimed to create a prognostic model for surgical outcomes in patients with cervical ossification of the posterior longitudinal ligament (OPLL) using machine learning (ML). SUMMARY OF BACKGROUND DATA Determining surgical outcomes helps surgeons provide prognostic information to patients and manage their expectations. ML is a mathematical model that finds patterns from a large sample of data and makes predictions outperforming traditional statistical methods. METHODS Of 478 patients, 397 and 370 patients had complete follow-up information at 1 and 2 years, respectively, and were included in the analysis. A minimal clinically important difference (MCID) was defined as an acquired Japanese Orthopedic Association (JOA) score of ≥2.5 points, after which a ML model that predicts whether MCID can be achieved 1 and 2 years after surgery was created. Patient background, clinical symptoms, and imaging findings were used as variables for analysis. The ML model was created using LightGBM, XGBoost, random forest, and logistic regression, after which the accuracy and area under the receiver-operating characteristic curve (AUC) were calculated. RESULTS The mean JOA score was 10.3 preoperatively, 13.4 at 1 year after surgery, and 13.5 at 2 years after surgery. XGBoost showed the highest AUC (0.72) and high accuracy (67.8) for predicting MCID at 1 year, whereas random forest had the highest AUC (0.75) and accuracy (69.6) for predicting MCID at 2 years. Among the included features, total preoperative JOA score, duration of symptoms, body weight, sensory function of the lower extremity sub-score of the JOA, and age were identified as having the most significance in most of ML models. CONCLUSION Constructing a prognostic ML model for surgical outcomes in patients with OPLL is feasible, suggesting the potential application of ML for predictive models of spinal surgery.Level of Evidence: 4.
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27
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First neurological symptoms in degenerative cervical myelopathy: does it predict the outcome? EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2021; 31:327-333. [PMID: 34822020 DOI: 10.1007/s00586-021-07060-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 09/27/2021] [Accepted: 11/10/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE Degenerative cervical myelopathy (DCM) is the most common non-traumatic cause of spinal cord dysfunction. Prediction of the neurological outcome after surgery is important. The aim of this study was to analyze the relationship between first symptoms of DCM and the neurological outcome after surgery. METHODS A retrospective analysis over a period of 10 years was performed. First symptoms such as cervicobrachial neuralgia, sensory and motor deficits and gait disturbances were evaluated regarding the postoperative neurological outcome. The modified Japanese Orthopedic Association Score (mJOA Score) was used to evaluate neurological outcome. RESULTS In total, 411 patients (263 males, 64%) with a median age of 62.6 ± 12.1 years were included. Cervicobrachial neuralgia was described in 40.2%, gait disturbance in 31.6%, sensory deficits in 19% and motor deficits in 9.2% as first symptom. Patients with cervicobrachial neuralgia were significantly younger (median age of 58 years, p = 0.0005) than patients with gait disturbances (median age of 68 years, p = 0.0005). Patients with gait disturbances and motor deficits as first symptom showed significantly lower mJOA Scores than other patients (p = 0.0005). Additionally, motor deficits and gait disturbance were negative predictors for postoperative outcome according to the mJOA Score. CONCLUSION Motor deficits and gait disturbances as the first symptom of DCM are negative predictors for postoperative neurological outcome. Nevertheless, patients with motor deficits and gait disturbance significantly profit from the surgical treatment despite poor preoperative mJOA Score.
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Khan O, Badhiwala JH, Witiw CD, Wilson JR, Fehlings MG. Machine learning algorithms for prediction of health-related quality-of-life after surgery for mild degenerative cervical myelopathy. Spine J 2021; 21:1659-1669. [PMID: 32045708 DOI: 10.1016/j.spinee.2020.02.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 02/03/2023]
Abstract
BACKGROUND Degenerative cervical myelopathy (DCM) is the most common cause of spinal cord dysfunction worldwide. Current guidelines recommend management based on the severity of myelopathy, measured by the modified Japanese Orthopedic Association (mJOA) score. Patients with moderate to severe myelopathy, defined by an mJOA below 15, are recommended to undergo surgery. However, the management for mild myelopathy (mJOA between 15 and 17) is controversial since the response to surgery is more heterogeneous. PURPOSE To develop machine learning algorithms predicting phenotypes of mild myelopathy patients that would benefit most from surgery. STUDY DESIGN Retrospective subgroup analysis of prospectively collected data. PATIENT SAMPLES Data were obtained from 193 mild DCM patients who underwent surgical decompression and were enrolled in the multicenter AOSpine CSM clinical trials. OUTCOME MEASURES The mJOA score, an assessment of functional status, was used to isolate patients with mild DCM. The primary outcome measures were change from baseline for the Short Form-36 (SF-36) mental component summary (MCS) and physical component summary (PCS) at 1-year postsurgery. These changes were dichotomized according to whether they exceeded the minimal clinically important difference. METHODS The data were split into training (75%) and testing (25%) sets. Model predictors included baseline demographic variables and clinical presentation. Seven machine learning algorithms and a logistic regression model were trained and optimized using the training set, and their performances were evaluated using the testing set. For each outcome (improvement in MCS or PCS), the machine learning algorithm with the greatest area under the curve (AUC) on the training set was selected for further analysis. RESULTS The generalized boosted model (GBM) and earth models performed well in the prediction of significant improvement in MCS and PCS respectively, with AUCs of 0.72 to 0.78 on the training set. This performance was replicated on the testing set, in which the GBM and earth models showed AUCs of 0.77 and 0.78, respectively, as well as fair to good calibration across the predicted range of probabilities. Female patients with a low initial MCS were less likely to experience significant improvement in MCS than males. The presence of certain signs and symptoms (eg, lower limb spasticity, clumsy hands) were also predictive of worse outcome. CONCLUSIONS Machine learning models showed good predictive power and provided information about the phenotypes of mild DCM patients most likely to benefit from surgical intervention. Overall, machine learning may be a useful tool for management of mild DCM, though external validation and prospective analysis should be performed to better solidify its role.
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Affiliation(s)
- Omar Khan
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Jetan H Badhiwala
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Christopher D Witiw
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Jefferson R Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.
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TO THE EDITOR. Spine (Phila Pa 1976) 2021; 46:E1066. [PMID: 34265809 DOI: 10.1097/brs.0000000000004165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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Alves ÓL. Cervical Total Disc Replacement: Expanded Indications. Neurosurg Clin N Am 2021; 32:437-448. [PMID: 34538470 DOI: 10.1016/j.nec.2021.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Cervical total disc replacement (cTDR) is now a firm alternative to anterior cervical discectomy and fusion (ACDF) for degenerative disc disease (DDD). Robust level 1 data from Federal Drug Administration-approved clinical trials demonstrated that cTDR is in any case equally safe and effective compared with ACDF for 1- or 2-level DDD. Furthermore, from early postoperative to long-term follow-up of 10 to 15 years, cTDR rates superiorly in many primary clinical outcomes. According to the published literature, at least nine different cTDR devices share this consistent pattern. On the other hand, the surgical treatment of more than 2-level disc disease is haunted by an elusive paradox. It is easily understandable that 3- and 4-level ACDF, with the well-known associated limitations, is not the superlative intervention for a spine segment anatomically designed to provide motion, as cervical spine is. Furthermore, multilevel ACDF exacerbates many of the clinical and biomechanical complications related with single-level fusion. However, as cTDR is not immaculate of constraints and failures, its clinical safety and efficacy and cost-effectiveness in multilevel anterior compressive pathology need to be established. This article analyses the current available evidence supporting the expanded indication of cTDR to 3- and 4-level disc disease, either stand-alone or adjacent to fusion, from a less stringent European perspective.
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Affiliation(s)
- Óscar L Alves
- Hospital Lusíadas Porto; Centro Hospitalar de Gaia/Espinho, Rua Cónego Ferreira Pinto, 191, 4050-256 Porto, Portugal.
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Clinically Meaningful Improvement Following Cervical Spine Surgery: 30% Reduction Versus Absolute Point-change MCID Values. Spine (Phila Pa 1976) 2021; 46:717-725. [PMID: 33337676 DOI: 10.1097/brs.0000000000003887] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Retrospective analysis of prospectively collected registry data. OBJECTIVE The aim of this study was to compare the performance of 30% reduction to established absolute point-change values for measures of disability and pain in patients undergoing elective cervical spine surgery. SUMMARY OF BACKGROUND DATA Recent studies recommend using a proportional change from baseline instead of an absolute point-change value to define minimum clinically important difference (MCID). METHODS Analyses included 13,179 patients who underwent cervical spine surgery for degenerative disease between April 2013 and February 2018. Participants completed a baseline and 12-month follow-up assessment that included questionnaires to assess disability (Neck Disability Index [NDI]), neck and arm pain (Numeric Rating Scale [NRS-NP/AP], and satisfaction [NASS scale]). Participants were classified as met or not met 30% reduction from baseline in each of the respective measures. The 30% reduction in scores at 12 months was compared to a wide range of established absolute point-change MCID values using receiver-operating characteristic curves, area under the receiver-operating characteristic curve (AUROC), and logistic regression analyses. These analyses were conducted for the entire patient cohort, as well as for subgroups based on baseline severity and surgical approach. RESULTS Thirty percent reduction in NDI and NRS-NP/AP scores predicted satisfaction with more accuracy than absolute point-change values for the total population and ACDF and posterior fusion procedures (P < 0.05). The largest AUROC differences, in favor of 30% reduction, were found for the lowest disability (ODI 0-20%: 16.8%) and bed-bound disability (ODI 81%-100%: 16.6%) categories. For pain, there was a 1.9% to 11% and 1.6% to 9.6% AUROC difference for no/mild neck and arm pain (NRS 0-4), respectively, in favor of a 30% reduction threshold. CONCLUSION A 30% reduction from baseline is a valid method for determining MCID in disability and pain for patients undergoing cervical spine surgery.Level of Evidence: 3.
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Khan O, Badhiwala JH, Akbar MA, Fehlings MG. Prediction of Worse Functional Status After Surgery for Degenerative Cervical Myelopathy: A Machine Learning Approach. Neurosurgery 2021; 88:584-591. [PMID: 33289519 DOI: 10.1093/neuros/nyaa477] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 08/12/2020] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Surgical decompression for degenerative cervical myelopathy (DCM) is one of the mainstays of treatment, with generally positive outcomes. However, some patients who undergo surgery for DCM continue to show functional decline. OBJECTIVE To use machine learning (ML) algorithms to determine predictors of worsening functional status after surgical intervention for DCM. METHODS This is a retrospective analysis of prospectively collected data. A total of 757 patients enrolled in 2 prospective AO Spine clinical studies, who underwent surgical decompression for DCM, were analyzed. The modified Japanese Orthopedic Association (mJOA) score, a marker of functional status, was obtained before and 1 yr postsurgery. The primary outcome measure was the dichotomized change in mJOA at 1 yr according to whether it was negative (worse functional status) or non-negative. After applying an 80:20 training-testing split of the dataset, we trained, optimized, and tested multiple ML algorithms to evaluate algorithm performance and determine predictors of worse mJOA at 1 yr. RESULTS The highest-performing ML algorithm was a polynomial support vector machine. This model showed good calibration and discrimination on the testing data, with an area under the receiver operating characteristic curve of 0.834 (accuracy: 74.3%, sensitivity: 88.2%, specificity: 72.4%). Important predictors of functional decline at 1 yr included initial mJOA, male gender, duration of myelopathy, and the presence of comorbidities. CONCLUSION The reasons for worse mJOA are frequently multifactorial (eg, adjacent segment degeneration, tandem lumbar stenosis, ongoing neuroinflammatory processes in the cord). This study successfully used ML to predict worse functional status after surgery for DCM and to determine associated predictors.
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Affiliation(s)
- Omar Khan
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Jetan H Badhiwala
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Muhammad A Akbar
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Ontario, Canada.,Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada
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Shin JJ, Jeon H, Lee JJ, Kim HC, Kim TW, An SB, Shin DA, Yi S, Kim KN, Yoon DH, Nagoshi N, Watanabe K, Nakamura M, Matsumoto M, Li N, Ma S, He D, Tian W, Kwan KYH, Cheung KMC, Riew KD, Hoh DJ, Ha Y. Predictors of neurologic outcome after surgery for cervical ossification of the posterior longitudinal ligament differ based on myelopathy severity: a multicenter study. J Neurosurg Spine 2021; 34:749-758. [PMID: 33711809 DOI: 10.3171/2020.8.spine20504] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 08/27/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The purpose of this retrospective multicenter study was to compare prognostic factors for neurological recovery in patients undergoing surgery for cervical ossification of the posterior longitudinal ligament (OPLL) based on their presenting mild, moderate, or severe myelopathy. METHODS The study included 372 consecutive patients with OPLL who underwent surgery for cervical myelopathy between 2006 and 2016 in East Asian countries with a high OPLL prevalence. Baseline and postoperative clinical outcomes were assessed using the Japanese Orthopaedic Association (JOA) myelopathy score and recovery ratio. Radiographic assessment included occupying ratio, cervical range of motion, and sagittal alignment parameters. Patient myelopathy was classified as mild, moderate, or severe based on the preoperative JOA score. Linear and multivariate regression analyses were performed to identify patient and surgical factors associated with neurological recovery stratified by baseline myelopathy severity. RESULTS The mean follow-up period was 45.4 months (range 25-140 months). The mean preoperative and postoperative JOA scores and recovery ratios for the total cohort were 11.7 ± 3.0, 14.5 ± 2.7, and 55.2% ± 39.3%, respectively. In patients with mild myelopathy, only age and diabetes correlated with recovery. In patients with moderate to severe myelopathy, older age and preoperative increased signal intensity on T2-weighted imaging were significantly correlated with a lower likelihood of recovery, while female sex and anterior decompression with fusion (ADF) were associated with better recovery. CONCLUSIONS Various patient and surgical factors are correlated with likelihood of neurological recovery after surgical treatment for cervical OPLL, depending on the severity of presenting myelopathy. Older age, male sex, intramedullary high signal intensity, and posterior decompression are associated with less myelopathy improvement in patients with worse baseline function. Therefore, myelopathy-specific preoperative counseling regarding prognosis for postoperative long-term neurological improvement should include consideration of these individual and surgical factors.
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Affiliation(s)
- Jun Jae Shin
- 1Department of Neurosurgery, Yongin Severance Hospital, Yonsei University School of Medicine, Yongin
| | - Hyeongseok Jeon
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Jong Joo Lee
- 3Department of Neurosurgery, Bundang Jesaeng Hospital, Seoul
| | - Hyung Cheol Kim
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Tae Woo Kim
- 4Department of Neurosurgery, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea
| | - Sung Bae An
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Dong Ah Shin
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Seong Yi
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Keung-Nyun Kim
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Do-Heum Yoon
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
| | - Narihito Nagoshi
- 5Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Kota Watanabe
- 5Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Masaya Nakamura
- 5Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Morio Matsumoto
- 5Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
| | - Nan Li
- 6Department of Spine Surgery, Beijing Jishuitan Hospital, the 4th Teaching Hospital of Peking University, Beijing
| | - Sai Ma
- 6Department of Spine Surgery, Beijing Jishuitan Hospital, the 4th Teaching Hospital of Peking University, Beijing
| | - Da He
- 6Department of Spine Surgery, Beijing Jishuitan Hospital, the 4th Teaching Hospital of Peking University, Beijing
| | - Wei Tian
- 6Department of Spine Surgery, Beijing Jishuitan Hospital, the 4th Teaching Hospital of Peking University, Beijing
| | - Kenny Yat Hong Kwan
- 7Department of Orthopaedics and Traumatology, LKS Faculty of Medicine, The University of Hong Kong, China
| | - Kenneth Man Chee Cheung
- 7Department of Orthopaedics and Traumatology, LKS Faculty of Medicine, The University of Hong Kong, China
| | - K Daniel Riew
- 8Department of Orthopedic Surgery, Columbia University College of Physicians and Surgeons, New York
- 9Department of Neurological Surgery, Weill Cornell Medical College, Cornell University, New York, New York
| | - Daniel J Hoh
- 10Department of Neurosurgery, University of Florida, Gainesville, Florida; and
| | - Yoon Ha
- 2Department of Neurosurgery, Spine and Spinal Cord Institute, Severance Hospital, Yonsei University College of Medicine, Seoul
- 11POSTECH Biotech Center, Pohang University of Science and Technology, Pohang, Gyeongbuk, Korea
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Abstract
STUDY DESIGN Retrospective study (data analysis). OBJECTIVE The purpose of this study was to assess the role of different factors on postoperative outcome of patients with degenerative cervical myelopathy (DCM). SUMMARY OF BACKGROUND DATA Ongoing degenerative changes of DCM lead to progressive neurological deficits. The optimal timing of surgical treatment is still unclear, especially in patients with mild DCM. METHODS Patients with DCM treated in our clinic between 2007 and 2016 were retrospectively analyzed. Pre- and postoperative neurological function was assessed by the modified Japanese Orthopaedic Association Score (mJOA Score) at different stages. The minimum clinically important difference (MCID) was used to evaluate the improvement after surgery. The comorbidities were recorded using the Charlson Comorbidity Index (CCI). Possible associations between age, sex, CCI, preoperative symptoms duration, high signal intensity (SI) on T2-weighted magnetic resonance imaging (MRI) with mJOA Score and MCID were analyzed using univariate analysis and multivariate regression models. Additionally, subgroup analysis was performed according to the severity of DCM (mild: mJOA Score ≥15 points; moderate: mJOA Score of 12-14 points; and severe: mJOA Score <12 points). RESULTS The mean age of the final cohort (n = 411) was 62.6 years (range: 31-96 years), 36.0% were females. High SI on T2-weighted MRI was detected in 60.3% of the cases. In the multivariate analysis, patients' age (P = 0.005), higher CCI (P = 0.001), and presence of high SI on T2-weighted MRI (P = 0.0005) were associated independently with lower pre- and postoperative mJOA Score and postoperative MCID. Subgroup analysis revealed age and high SI on T2-weighted MRI as predictors of pre- and postoperative mJOA. However, symptom duration did not influence neurological outcome according to the severity of DCM. CONCLUSION Surgery for DCM leads to significant functional improvement. However, better outcome was observed in younger individuals with lower CCI and absence of radiographic myelopathy signs. Therefore, DCM surgery, particularly before occurrence of high SI on MRI, seems to be essential for postoperative functional improvement regardless the above-mentioned confounders.Level of Evidence: 3.
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Surgical Outcomes Following Laminectomy With Fusion Versus Laminectomy Alone in Patients With Degenerative Cervical Myelopathy. Spine (Phila Pa 1976) 2020; 45:1696-1703. [PMID: 32890295 DOI: 10.1097/brs.0000000000003677] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN .: Post-hoc analysis of a prospective observational cohort study. OBJECTIVE .: To compare clinical outcomes following laminectomy and fusion versus laminectomy alone in an international series of individuals suffering from degenerative cervical myelopathy (DCM). SUMMARY OF BACKGROUND DATA .: Significant controversy exists regarding the role of instrumented fusion in the context of posterior surgical decompression for DCM. A previous study comparing laminectomy and fusion with laminoplasty showed no differences in outcomes between groups after adjusting for preoperative characteristics. METHODS .: Based on the operation they received, 208 of the 757 patients prospectively enrolled in the AO Spine North America or International studies at 26 global sites were included in the present study. Twenty-two patients were treated with laminectomy alone and 186 received a laminectomy with fusion. Patients were evaluated using the modified Japanese Orthopedic Association scale (mJOA), Nurick score, Neck Disability Index, and SF36 quality of life measure. Baseline and surgical characteristics were compared using a t test for continuous variables and a chi-square test for categorical variables. A mixed model analytic approach was used to evaluate differences in outcomes at 24 months between patients undergoing laminectomy and fusion versus laminectomy alone. RESULTS .: Surgical cohorts were comparable in terms of preoperative patient characteristics. Patients undergoing laminectomy with instrumented fusion had a significantly longer operative duration (P < 0.0001, 231.44 vs. 107.10 min) but a comparable length of hospital stay. In terms of outcomes, patients treated with laminectomy with fusion exhibited clinically meaningful improvements (in functional impairmentΔmJOA = 2.48, ΔNurick = 1.19), whereas those who underwent a laminectomy without fusion did not (ΔmJOA = 0.78; ΔNurick = 0.29). There were significant differences between surgical cohorts in the change in mJOA and Nurick scores from preoperative to 24-months postoperative (mJOA: -1.70, P = 0.0266; Nurick: -0.90, P = 0.0241). The rate of perioperative complications was comparable (P = 0.879). CONCLUSION .: Our findings suggest that cervical laminectomy with instrumented fusion is more effective than laminectomy alone at improving functional impairment in patients with DCM. These results warrant confirmation in larger prospective comparative studies. LEVEL OF EVIDENCE 2.
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Influence of dynamic preoperative body mass index changes on patient-reported outcomes after surgery for degenerative lumbar spine disease. Neurosurg Rev 2020; 44:2689-2696. [PMID: 33305336 PMCID: PMC8490227 DOI: 10.1007/s10143-020-01454-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 11/03/2020] [Accepted: 12/02/2020] [Indexed: 12/14/2022]
Abstract
Psychological factors demonstrably and often massively influence outcomes of degenerative spine surgery, and one could hypothesize that preoperative weight loss may correlate with motivation and lifestyle adjustment, thus leading to potentially enhanced outcomes. We aimed to evaluate the effect of preoperative weight loss or gain, respectively, on patient-reported outcomes after lumbar spine surgery. Weight loss was defined as a BMI decrease of ≤ − 0.5 kg/m2 over a period of at least 1 month, and weight gain as a BMI increase of ≥ 0.5 kg/m2 in the same time period, respectively. The primary endpoint was set as the achievement of the minimum clinically important difference (MCID) in the ODI at 1 or 2 years postoperatively. A total of 154 patients were included. Weight loss (odds ratio (OR): 1.18, 95% confidence interval (CI): 0.52 to 2.80) and weight gain (OR: 1.03, 95% CI: 0.43 to 2.55) showed no significant influence on MCID achievement for ODI compared to a stable BMI. The same results were observed when analysing long-term NRS-BP and NRS-LP. Regression analysis showed no correlation between BMI change and PROM change scores for any of the three PROMs. Adjustment for age and gender did not alter results. Our findings suggest that both preoperative weight loss and weight gain may have no measurable effect on long-term postoperative outcome compared to a stable BMI. Weight loss preoperatively—as a potential surrogate sign of patient motivation and lifestyle change—may thus not influence postoperative outcomes.
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Machino M, Ando K, Kobayashi K, Nakashima H, Kanbara S, Ito S, Inoue T, Koshimizu H, Ito K, Kato F, Imagama S. Prediction of outcome following laminoplasty of cervical spondylotic myelopathy: Focus on the minimum clinically important difference. J Clin Neurosci 2020; 81:321-327. [PMID: 33222939 DOI: 10.1016/j.jocn.2020.09.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/13/2020] [Accepted: 09/28/2020] [Indexed: 11/30/2022]
Abstract
The minimum clinically important difference (MCID) of the Japanese Orthopaedic Association (JOA) score has been reported to be around 2.5 points in cervical myelopathy. This study sought to define significant predictive factors on achieving the MCID following laminoplasty in a large series of patients with cervical spondylotic myelopathy (CSM). A total of 485 consecutive patients with CSM (295 males and 190 females; mean age: 67.0 years; age range: 42-91 years) who underwent laminoplasty were prospectively enrolled. The average postoperative follow-up period was 26.6 months (range: 12-66 months). We calculated the achieved JOA score. The relationships between outcomes and various clinical and imaging predictors including comorbidity and quantitative performance tests were examined. Logistic regression analysis was conducted to identify the predictors correlated with a JOA score of 2.5 points or more. Clinically meaningful gains were exhibited in 299 patients (61.6%) with a JOA score of ≥2.5 points, whereas 186 patients (38.4%) achieved a JOA score of <2.5 points. Univariate logistic regression analysis showed the predictive factors with a shorter duration of CSM symptoms, lower preoperative JOA scores, absence of hypertension, no use of anticoagulant/antiplatelet agents, and nonsmoking status. Multivariate logistic regression analysis determined that the duration of CSM symptoms (odds ratio: 0.771, 95% confidence interval: 0.705-0.844; p < 0.01) was the only significant predictive factor for achieving JOA scores of ≥2.5 points. An important predictor of MCID achievement following laminoplasty was shorter duration of CSM symptoms.
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Affiliation(s)
- Masaaki Machino
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kei Ando
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kazuyoshi Kobayashi
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroaki Nakashima
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shunsuke Kanbara
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sadayuki Ito
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Taro Inoue
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroyuki Koshimizu
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Keigo Ito
- Department of Orthopedic Surgery, Chubu Rosai Hospital, Japan Organization of Occupational Health and Safety, Nagoya, Japan.
| | - Fumihiko Kato
- Department of Orthopedic Surgery, Chubu Rosai Hospital, Japan Organization of Occupational Health and Safety, Nagoya, Japan
| | - Shiro Imagama
- Department of Orthopedic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Khan I, Archer KR, Wanner JP, Bydon M, Pennings JS, Sivaganesan A, Knightly JJ, Foley KT, Bisson EF, Shaffrey C, McGirt MJ, Asher AL, Devin CJ. Trajectory of Improvement in Myelopathic Symptoms From 3 to 12 Months Following Surgery for Degenerative Cervical Myelopathy. Neurosurgery 2020; 86:763-768. [PMID: 31435676 DOI: 10.1093/neuros/nyz325] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 05/18/2019] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Degenerative cervical myelopathy (DCM) is a progressive disease resulting from cervical cord compression. The modified Japanese Orthopaedic Association (mJOA) is commonly used to grade myelopathic symptoms, but its persistent postoperative improvement has not been previously explored. OBJECTIVE To utilize the Quality Outcomes Database (QOD) to evaluate the trajectory of outcomes in those operatively treated for DCM. METHODS This study is a retrospective analysis of prospectively collected data. The QOD was queried for patients undergoing elective surgery for DCM. Patients were divided into mild (≥14), moderate (9-13), or severe (<9) categories for their baseline severity of myelopathic symptoms (mJOA scores). A parsimonious multivariable logistic regression model was fitted with 2 points improvement on mJOA from 3- to 12-mo follow-up as the outcome of interest. RESULTS A total of 2156 patients who underwent elective surgery for DCM and had complete 3- and 12-mo follow-up were included in our analysis. Patients improved significantly from baseline to 3-mo on their mJOA scores, regardless of their baseline mJOA severity. After adjusting for the relevant preoperative characteristics, the baseline mJOA categories had significant impact on outcome of whether a patient keeps improving in mJOA score from 3 to 12 mo postsurgery. Patient with severe mJOA score at baseline had a higher likelihood of improvement in their myelopathic symptoms, compared to patients with mild mJOA score in. CONCLUSION Most patients achieve improvement on a shorter follow-up; however, patients with severe symptoms keep on improving until after a longer follow-up. Preoperative identification of such patients helps the clinician settling realistic expectations for each follow-up timepoint.
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Affiliation(s)
- Inamullah Khan
- Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Department of Neurological surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Center for Musculoskeletal Research, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Kristin R Archer
- Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Center for Musculoskeletal Research, Vanderbilt University School of Medicine, Nashville, Tennessee.,Department of Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, Tennessee
| | - John Paul Wanner
- Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Mohamad Bydon
- Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota
| | - Jacquelyn S Pennings
- Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Center for Musculoskeletal Research, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Ahilan Sivaganesan
- Department of Neurological surgery, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - Kevin T Foley
- Department of Neurosurgery, University of Tennessee Health Sciences Center, Semmes-Murphey Neurologic and Spine Institute, Memphis, Tennessee
| | - Erica F Bisson
- Department of Neurosurgery, University of Utah, Salt Lake City, Utah
| | - Christopher Shaffrey
- Department of Neurosurgery, University of Virginia Medical Center, Charlottesville, Virginia
| | - Matthew J McGirt
- Carolina Neurosurgery and Spine Associates, Carolinas Healthcare System, Charlotte, North Carolina
| | - Anthony L Asher
- Carolina Neurosurgery and Spine Associates, Carolinas Healthcare System, Charlotte, North Carolina
| | - Clinton J Devin
- Department of Orthopedic Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Department of Neurological surgery, Vanderbilt University School of Medicine, Nashville, Tennessee.,Steamboat Orthopaedic and Spine Institute, Steamboat Springs, Colorado
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Badhiwala JH, Hachem LD, Merali Z, Witiw CD, Nassiri F, Akbar MA, Almenawer SA, Schomacher M, Wilson JR, Fehlings MG. Predicting Outcomes After Surgical Decompression for Mild Degenerative Cervical Myelopathy: Moving Beyond the mJOA to Identify Surgical Candidates. Neurosurgery 2020; 86:565-573. [PMID: 31225604 DOI: 10.1093/neuros/nyz160] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 01/21/2019] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Patients with mild degenerative cervical myelopathy (DCM) represent a heterogeneous population, and indications for surgical decompression remain controversial. OBJECTIVE To dissociate patient phenotypes within the broader population of mild DCM associated with degree of impairment in baseline quality of life (QOL) and surgical outcomes. METHODS This was a post hoc analysis of patients with mild DCM (modified Japanese Orthopedic Association [mJOA] 15-17) enrolled in the AOSpine CSM-NA/CSM-I studies. A k-means clustering algorithm was applied to baseline QOL (Short Form-36 [SF-36]) scores to separate patients into 2 clusters. Baseline variables and surgical outcomes (change in SF-36 scores at 1 yr) were compared between clusters. A k-nearest neighbors (kNN) algorithm was used to evaluate the ability to classify patients into the 2 clusters by significant baseline clinical variables. RESULTS One hundred eighty-five patients were eligible. Two groups were generated by k-means clustering. Cluster 1 had a greater proportion of females (44% vs 28%, P = .029) and symptoms of neck pain (32% vs 11%, P = .001), gait difficulty (57% vs 40%, P = .025), or weakness (75% vs 59%, P = .041). Although baseline mJOA correlated with neither baseline QOL nor outcomes, cluster 1 was associated with significantly greater improvement in disability (P = .003) and QOL (P < .001) scores following surgery. A kNN algorithm could predict cluster classification with 71% accuracy by neck pain, motor symptoms, and gender alone. CONCLUSION We have dissociated a distinct patient phenotype of mild DCM, characterized by neck pain, motor symptoms, and female gender associated with greater impairment in QOL and greater response to surgery.
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Affiliation(s)
- Jetan H Badhiwala
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Laureen D Hachem
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Zamir Merali
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Christopher D Witiw
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Farshad Nassiri
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Muhammad A Akbar
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Saleh A Almenawer
- Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Canada
| | - Markus Schomacher
- Department of Neurosurgery, Charité University Hospital, Berlin, Germany
| | - Jefferson R Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, Canada.,Division of Neurosurgery, Department of Surgery, McMaster University, Hamilton, Canada.,Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, Canada
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Zhang H, Guan L, Hai Y, Liu Y, Ding H, Chen X. Multi-shot echo-planar diffusion tensor imaging in cervical spondylotic myelopathy. Bone Joint J 2020; 102-B:1210-1218. [PMID: 32862690 DOI: 10.1302/0301-620x.102b9.bjj-2020-0468.r1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
AIMS The aim of this study was to use diffusion tensor imaging (DTI) to investigate changes in diffusion metrics in patients with cervical spondylotic myelopathy (CSM) up to five years after decompressive surgery. We correlated these changes with clinical outcomes as scored by the Modified Japanese Orthopedic Association (mJOA) method, Neck Disability Index (NDI), and Visual Analogue Scale (VAS). METHODS We used multi-shot, high-resolution, diffusion tensor imaging (ms-DTI) in patients with cervical spondylotic myelopathy (CSM) to investigate the change in diffusion metrics and clinical outcomes up to five years after anterior cervical interbody discectomy and fusion (ACDF). High signal intensity was identified on T2-weighted imaging, along with DTI metrics such as fractional anisotropy (FA). MJOA, NDI, and VAS scores were also collected and compared at each follow-up point. Spearman correlations identified correspondence between FA and clinical outcome scores. RESULTS Significant differences in mJOA scores and FA values were found between preoperative and postoperative timepoints up to two years after surgery. FA at the level of maximum cord compression (MCL) preoperatively was significantly correlated with the preoperative mJOA score. FA postoperatively was also significantly correlated with the postoperative mJOA score. There was no statistical relationship between NDI and mJOA or VAS. CONCLUSION ms-DTI can detect microstructural changes in affected cord segments and reflect functional improvement. Both FA values and mJOA scores showed maximum recovery two years after surgery. The DTI metrics are significantly associated with pre- and postoperative mJOA scores. DTI metrics are a more sensitive, timely, and quantifiable surrogate for evaluating patients with CSM and a potential quantifiable biomarker for spinal cord dysfunction. Cite this article: Bone Joint J 2020;102-B(9):1210-1218.
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Affiliation(s)
- Hanwen Zhang
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Li Guan
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yong Hai
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yuzeng Liu
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Hongtao Ding
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Xiaolong Chen
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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Evaniew N, Cadotte DW, Dea N, Bailey CS, Christie SD, Fisher CG, Paquet J, Soroceanu A, Thomas KC, Rampersaud YR, Manson NA, Johnson M, Nataraj A, Hall H, McIntosh G, Jacobs WB. Clinical predictors of achieving the minimal clinically important difference after surgery for cervical spondylotic myelopathy: an external validation study from the Canadian Spine Outcomes and Research Network. J Neurosurg Spine 2020; 33:129-137. [PMID: 32276258 DOI: 10.3171/2020.2.spine191495] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 02/18/2020] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Recently identified prognostic variables among patients undergoing surgery for cervical spondylotic myelopathy (CSM) are limited to two large international data sets. To optimally inform shared clinical decision-making, the authors evaluated which preoperative clinical factors are significantly associated with improvement on the modified Japanese Orthopaedic Association (mJOA) scale by at least the minimum clinically important difference (MCID) 12 months after surgery, among patients from the Canadian Spine Outcomes and Research Network (CSORN). METHODS The authors performed an observational cohort study with data that were prospectively collected from CSM patients at 7 centers between 2015 and 2017. Candidate variables were tested using univariable and multiple binomial logistic regression, and multiple sensitivity analyses were performed to test assumptions about the nature of the statistical models. Validated mJOA MCIDs were implemented that varied according to baseline CSM severity. RESULTS Among 205 patients with CSM, there were 64 (31%) classified as mild, 86 (42%) as moderate, and 55 (27%) as severe. Overall, 52% of patients achieved MCID and the mean change in mJOA score at 12 months after surgery was 1.7 ± 2.6 points (p < 0.01), but the subgroup of patients with mild CSM did not significantly improve (mean change 0.1 ± 1.9 points, p = 0.8). Univariate analyses failed to identify significant associations between achieving MCID and sex, BMI, living status, education, smoking, disability claims, or number of comorbidities. After adjustment for potential confounders, the odds of achieving MCID were significantly reduced with older age (OR 0.7 per decade, 95% CI 0.5-0.9, p < 0.01) and higher baseline mJOA score (OR 0.8 per point, 95% CI 0.7-0.9, p < 0.01). The effects of symptom duration (OR 1.0 per additional month, 95% CI 0.9-1.0, p = 0.2) and smoking (OR 0.4, 95% CI 0.2-1.0, p = 0.06) were not statistically significant. CONCLUSIONS Surgery is effective at halting the progression of functional decline with CSM, and approximately half of all patients achieve the MCID. Data from the CSORN confirmed that older age is independently associated with poorer outcomes, but novel findings include that patients with milder CSM did not experience meaningful improvement, and that symptom duration and smoking were not important. These findings support a nuanced approach to shared decision-making that acknowledges some prognostic uncertainty when weighing the various risks, benefits, and alternatives to surgical treatment.
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Affiliation(s)
- Nathan Evaniew
- 1University of Calgary Spine Program, University of Calgary, Alberta
| | - David W Cadotte
- 1University of Calgary Spine Program, University of Calgary, Alberta
| | - Nicolas Dea
- 2Vancouver Spine Surgery Institute, University of British Columba, Vancouver, British Columbia
| | | | - Sean D Christie
- 4Department of Surgery, Dalhousie University, Halifax, Nova Scotia
| | - Charles G Fisher
- 2Vancouver Spine Surgery Institute, University of British Columba, Vancouver, British Columbia
| | | | - Alex Soroceanu
- 1University of Calgary Spine Program, University of Calgary, Alberta
| | - Kenneth C Thomas
- 1University of Calgary Spine Program, University of Calgary, Alberta
| | | | - Neil A Manson
- 4Department of Surgery, Dalhousie University, Halifax, Nova Scotia
- 7Canada East Spine Centre, Saint John, New Brunswick
| | - Michael Johnson
- 8Department of Surgery, University of Manitoba, Winnipeg, Manitoba
| | - Andrew Nataraj
- 9Department of Surgery, University of Alberta, Edmonton, Alberta; and
| | - Hamilton Hall
- 6Department of Surgery, University of Toronto, Ontario
| | - Greg McIntosh
- 10Canadian Spine Outcomes and Research Network, Markdale, Ontario, Canada
| | - W Bradley Jacobs
- 1University of Calgary Spine Program, University of Calgary, Alberta
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Cole TS, Almefty KK, Godzik J, Muma AH, Hlubek RJ, Martinez-Del-Campo E, Theodore N, Kakarla UK, Turner JD. Functional improvement in hand strength and dexterity after surgical treatment of cervical spondylotic myelopathy: a prospective quantitative study. J Neurosurg Spine 2020; 32:907-913. [PMID: 32032958 DOI: 10.3171/2019.10.spine19685] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 10/28/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Cervical spondylotic myelopathy (CSM) is the primary cause of adult spinal cord dysfunction. Diminished hand strength and reduced dexterity associated with CSM contribute to disability. Here, the authors investigated the impact of CSM severity on hand function using quantitative testing and evaluated the response to surgical intervention. METHODS Thirty-three patients undergoing surgical treatment of CSM were prospectively enrolled in the study. An occupational therapist conducted 3 functional hand tests: 1) palmar dynamometry to measure grip strength, 2) hydraulic pinch gauge test to measure pinch strength, and 3) 9-hole peg test (9-HPT) to evaluate upper extremity dexterity. Tests were performed preoperatively and 6-8 weeks postoperatively. Test results were expressed as 1) a percentile relative to age- and sex-stratified norms and 2) achievement of a minimum clinically important (MCI) difference. Patients were stratified into groups (mild, moderate, and severe myelopathy) based on their modified Japanese Orthopaedic Association (mJOA) score. The severity of stenosis on preoperative MRI was graded by three independent physicians using the Kang classification. RESULTS The primary presenting symptoms were neck pain (33%), numbness (21%), imbalance (12%), and upper extremity weakness (12%). Among the 33 patients, 61% (20) underwent anterior approach decompression, with a mean (SD) of 2.9 (1.5) levels treated. At baseline, patients with moderate and low mJOA scores (indicating more severe myelopathy) had lower preoperative pinch (p < 0.001) and grip (p = 0.01) strength than those with high mJOA scores/mild myelopathy. Postoperative improvement was observed in all hand function domains except pinch strength in the nondominant hand, with MCI differences at 6 weeks ranging from 33% of patients in dominant-hand strength tests to 73% of patients in nondominant-hand dexterity tests. Patients with moderate baseline mJOA scores were more likely to have MCI improvement in dominant grip strength (58.3%) than those with low mJOA scores/severe myelopathy (30%) and high mJOA scores/mild myelopathy (9%, p = 0.04). Dexterity in the dominant hand as measured by the 9-HPT ranged from < 1 in patients with cord signal change to 15.9 in patients with subarachnoid effacement only (p = 0.03). CONCLUSIONS Patients with CSM achieved significant improvement in strength and dexterity postoperatively. Baseline strength measures correlated best with the preoperative mJOA score; baseline dexterity correlated best with the severity of stenosis on MRI. The majority of patients experienced MCI improvements in dexterity. Baseline pinch strength correlated with postoperative mJOA MCI improvement, and patients with moderate baseline mJOA scores were the most likely to have improvement in dominant grip strength postoperatively.
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Degenerative cervical myelopathy - update and future directions. Nat Rev Neurol 2020; 16:108-124. [PMID: 31974455 DOI: 10.1038/s41582-019-0303-0] [Citation(s) in RCA: 233] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2019] [Indexed: 11/09/2022]
Abstract
Degenerative cervical myelopathy (DCM) is the leading cause of spinal cord dysfunction in adults worldwide. DCM encompasses various acquired (age-related) and congenital pathologies related to degeneration of the cervical spinal column, including hypertrophy and/or calcification of the ligaments, intervertebral discs and osseous tissues. These pathologies narrow the spinal canal, leading to chronic spinal cord compression and disability. Owing to the ageing population, rates of DCM are increasing. Expeditious diagnosis and treatment of DCM are needed to avoid permanent disability. Over the past 10 years, advances in basic science and in translational and clinical research have improved our understanding of the pathophysiology of DCM and helped delineate evidence-based practices for diagnosis and treatment. Surgical decompression is recommended for moderate and severe DCM; the best strategy for mild myelopathy remains unclear. Next-generation quantitative microstructural MRI and neurophysiological recordings promise to enable quantification of spinal cord tissue damage and help predict clinical outcomes. Here, we provide a comprehensive, evidence-based review of DCM, including its definition, epidemiology, pathophysiology, clinical presentation, diagnosis and differential diagnosis, and non-operative and operative management. With this Review, we aim to equip physicians across broad disciplines with the knowledge necessary to make a timely diagnosis of DCM, recognize the clinical features that influence management and identify when urgent surgical intervention is warranted.
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Ross DA, O'Glasser AY. Minimally invasive cervical laminectomy for spondylotic myelopathy in medically fragile patients. Surg Neurol Int 2019; 10:219. [PMID: 31819813 PMCID: PMC6884944 DOI: 10.25259/sni_518_2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Accepted: 10/23/2019] [Indexed: 11/04/2022] Open
Abstract
Background Cervical spondylotic myelopathy often affects elderly and fragile patients who are not optimal candidates for major surgical procedures. Here, we report patients previously judged not suitable for cervical surgery, who were successfully treated with minimally invasive (MI) cervical decompressions without complications. Methods Retrospectively, we reviewed medically fragile patients (e.g., too many comorbidities), previously deemed unsuitable for surgery who successfully tolerated MI cervical decompressions. The accompanying preoperative comorbidities, surgical risks, complications, and neurological outcomes were assessed. Results Three male patients, with a mean age of 73 years, exhibited an average preoperative modified Japanese Orthopedic Association (mJOA) score of 8. The preoperative Charlson comorbidity indices, the Elixhauser comorbidity indices (respectively averaging 5.7 and 5.7 points, the preoperative Edmonton fragility index (average 12 points), and national surgical quality improvement program risks were calculated. Surgical times averaged 185 min and patients were followed for an average of 11.3 months. No patient had any immediate or delayed postoperative complications. The length of hospital stay was 1 day for each patient. The postoperative mJOA scores averaged 11, which was clinically significant. Further, the postoperative magnetic resonance imaging obtained approximately 3 months postoperative demonstrated adequate cord decompression. Conclusion Medically fragile patients with significant cervical spondylotic myelopathy but major comorbidities precluding major surgery successfully underwent MI cervical decompressions.
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Affiliation(s)
- Donald A Ross
- Department of Neurological Surgery, Oregon Health & Science University, and Operative Care Division Portland Veterans Administration Hospital, Portland, Oregon, US
| | - Avital Y O'Glasser
- Department of Medicine, Division of Hospital Medicine, Oregon Health & Science University, Portland, Oregon, US
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Tetreault LA, Zhu MP, Howard RM, Sorefan-Mangou F, Patel AA, Schroeder GD, Massicotte EM, Bhadiwala JH, Fehlings MG, Wilson JR. The discrepancy between functional outcome and self-reported health status after surgery for degenerative cervical myelopathy. Spine J 2019; 19:1809-1815. [PMID: 31278991 DOI: 10.1016/j.spinee.2019.06.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/25/2019] [Accepted: 06/30/2019] [Indexed: 02/03/2023]
Abstract
INTRODUCTION Surgery for degenerative cervical myelopathy has shown not only to halt neurologic deterioration, but also to improve functional impairments. Despite these improvements, some patients may be dissatisfied with their outcomes. This study aims to (1) investigate discrepancies between postoperative clinical measures and self-reported health status, and (2) identify important predictors of such discrepancies. METHODS Four hundred and seventy-nine surgical patients were prospectively enrolled in the CSM-International study at 16 global sites. At 1-year post-op, patients rated their general health status compared with their immediate preoperative status (much better, somewhat better, the same, somewhat worse, much worse). Descriptive analyses were conducted to evaluate the agreement between achieving a clinically important improvement (MCID) in function (modified Japanese Orthopedic Association [mJOA] scale) and self-reported health status. Agreement was defined as achieving the MCID on the mJOA and reporting general health as somewhat better or much better, whereas disagreement was defined as achieving MCID on the mJOA and reporting general health as the same, somewhat worse or much worse. Logistic regression analysis was used to determine factors that influence agreement between self-report of health status and functional outcomes. RESULTS A total of 395 patients had complete follow-up data at 1-year and were included in this analysis. Based on patient self-reports, 56 (14.2%) were somewhat or much worse than a year ago, 80 (20.2%) patients were the same and 259 (65.6%) patients were somewhat or much better. Thirty percent of patients who reported being somewhat or much worse were found to achieve the MCID on the mJOA; 57.5% of patients who indicated their health status were the same as before surgery also exhibited clinically meaningful improvements in functional impairment. Based on multivariate analysis, there was an increased odds of observing an agreement between self-reports of health status and functional outcomes if the patient exhibited greater improvement in mJOA upper extremity motor function at 1-year (odds ratio [OR]: 1.41, 95% confidence interval [CI] 1.03-1.93, p=.033) and reduced odds of agreement with increased age (OR for every decade: 0.66, 95% CI 0.50-0.87, p=.0035) and increased bodily pain at 1-year (OR: 0.62, 95% CI 0.49-078, p<.0001). CONCLUSIONS There was a discrepancy between changes in mJOA and self-reports of health status in patients undergoing surgery for degenerative cervical myelopathy. Increased bodily pain at 1-year, smaller improvements in postoperative upper extremity score and increased age were associated with worsened or unchanged general health status, despite clinically significant improvements in overall postoperative function.
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Affiliation(s)
- Lindsay A Tetreault
- Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, Canada M5T 2S8; Graduate Entry Medicine, University College Cork, College Rd, University College, Cork T12 K8AF Ireland
| | - Mary P Zhu
- Division of Neurosurgery, Department of Surgery, St. Michael's Hospital, 30 Bond Street, Toronto, Canada M5W 1W8
| | - Rachel M Howard
- Graduate Entry Medicine, University College Cork, College Rd, University College, Cork T12 K8AF Ireland
| | - Fatimah Sorefan-Mangou
- Graduate Entry Medicine, University College Cork, College Rd, University College, Cork T12 K8AF Ireland
| | - Alpesh A Patel
- Department of Orthopedic Surgery, Feinberg School of Medicine, Northwestern University, 420 E Superior Street, Chicago, IL 60611, USA
| | - Gregory D Schroeder
- Department of Orthopedic Surgery, Rothman Institute, Thomas Jefferson University Hospital, 925 Chestnut Street, Philadelphia, PA 19107, USA
| | - Eric M Massicotte
- Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, Canada M5T 2S8
| | - Jetan H Bhadiwala
- Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, Canada M5T 2S8
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, Toronto Western Hospital, 399 Bathurst Street, Toronto, Canada M5T 2S8
| | - Jefferson R Wilson
- Division of Neurosurgery, Department of Surgery, St. Michael's Hospital, 30 Bond Street, Toronto, Canada M5W 1W8; Li Ka Shing Knowledge Institute, St. Michael's Hospital, 209 Victoria Street, Toronto, Canada M5B 1T8.
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Wilson JRF, Badhiwala JH, Jiang F, Wilson JR, Kopjar B, Vaccaro AR, Fehlings MG. The Impact of Older Age on Functional Recovery and Quality of Life Outcomes after Surgical Decompression for Degenerative Cervical Myelopathy: Results from an Ambispective, Propensity-Matched Analysis from the CSM-NA and CSM-I International, Multi-Center Studies. J Clin Med 2019; 8:jcm8101708. [PMID: 31627303 PMCID: PMC6833063 DOI: 10.3390/jcm8101708] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/09/2019] [Accepted: 10/13/2019] [Indexed: 11/20/2022] Open
Abstract
Background: The effect on functional and quality of life (QOL) outcomes of surgery in elderly degenerative cervical myelopathy (DCM) patients has not been definitively established. Objective: To evaluate the effect of older age on the functional and QOL outcomes after surgery in an international, multi-center cohort of patients with DCM. Methods: 107 patients aged over 70 years old (mean 75.6 ± 4.4 years) were enrolled in the AOSpine CSM-North America and International studies. A propensity-matched cohort of 107 patients was generated from the remaining 650 adults aged <70 years old (mean 56.3 ± 9.6 years), matched to gender, complexity of surgery, co-morbidities, and baseline functional impairment (modified Japanese Orthopedic Association scale (mJOA). Functional, disability, and QOL outcomes were compared at baseline and at two years post-operatively, along with peri-operative adverse events. Results: Both cohorts were equivalently matched. At two years, both cohorts showed significant functional improvement from the baseline but the magnitude was greater in the younger cohort (mJOA 3.8 (3.2–4.4) vs. 2.6 (2.0–3.3); p = 0.007). This difference between groups was also observed in the SF-36 physical component summary (PCS) and mental component summary (MCS) outcomes (p = <0.001, p = 0.007), but not present in the neck disability index (NDI) scores (p = 0.094). Adverse events were non-significantly higher in the elderly cohort (22.4% vs. 15%; p = 0.161). Conclusions: Elderly patients showed an improvement in functional and QOL outcomes after surgery for DCM, but the magnitude of improvement was less when compared to the matched younger adult cohort. An age over 70 was not associated with an increased risk of adverse events.
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Affiliation(s)
- Jamie R F Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON M5T2S8, Canada.
- Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, ON M5T2S8, Canada.
| | - Jetan H Badhiwala
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON M5T2S8, Canada.
- Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, ON M5T2S8, Canada.
| | - Fan Jiang
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON M5T2S8, Canada.
- Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, ON M5T2S8, Canada.
| | - Jefferson R Wilson
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON M5T2S8, Canada.
- Division of Neurosurgery, St. Michael's Hospital, University Health Network, Toronto, ON M5B1W8, Canada.
| | - Branko Kopjar
- Department of Health Services, School of Public Health, University of Washington, Seattle, WA 98195, USA.
| | - Alexander R Vaccaro
- Department of Orthopedic Surgery, The Rothman Institute at Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | - Michael G Fehlings
- Division of Neurosurgery, Department of Surgery, University of Toronto, Toronto, ON M5T2S8, Canada.
- Division of Neurosurgery, Toronto Western Hospital, University Health Network, Toronto, ON M5T2S8, Canada.
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Davies B, Mowforth O, Sadler I, Aarabi B, Kwon B, Kurpad S, Harrop JS, Wilson JR, Grossman R, Fehlings MG, Kotter M. Recovery priorities in degenerative cervical myelopathy: a cross-sectional survey of an international, online community of patients. BMJ Open 2019; 9:e031486. [PMID: 31601597 PMCID: PMC6797315 DOI: 10.1136/bmjopen-2019-031486] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVES To establish the recovery priorities of individuals suffering with degenerative cervical myelopathy (DCM). DESIGN A cross-sectional, observational study. SETTING Patients from across the world with a diagnosis of DCM accessed the survey over an 18-month period on Myelopathy.org, an international myelopathy charity. PARTICIPANTS 481 individuals suffering from DCM completed the online survey fully. MAIN OUTCOME MEASURES Functional recovery domains were established through qualitative interviews and a consensus process. Individuals were asked about their disease characteristics, including limb pain (Visual Analogue Scale) and functional disability (patient-derived version of the modified Japanese Orthopaedic Association score). Individuals ranked recovery domains (arm and hand function, walking, upper body/trunk function, sexual function, elimination of pain, sensation and bladder/bowel function) in order of priority. Priorities were analysed as the modal first priority and mean ranking. The influence of demographics on selection was analysed, with significance p<0.05. RESULTS Of 659 survey responses obtained, 481 were complete. Overall, pain was the most popular recovery priority (39.9%) of respondents, followed by walking (20.2%), sensation (11.9%) and arm and hand function (11.5%). Sexual function (5.7%), bladder and bowel (3.7%) and trunk function (3.5%) were chosen less frequently. When considering the average ranking of symptoms, while pain remained the priority (2.6±2.0), this was closely followed by walking (2.9±1.7) and arm/hand function (3.0±1.4). Sensation ranked lower (4.3±2.1). With respect to disease characteristics, overall pain remained the recovery priority, with the exception of patients with greater walking impairment (p<0.005) who prioritised walking, even among patients with lower pain scores. CONCLUSIONS This is the first study investigating patient priorities in DCM. The patient priorities reported provide an important framework for future research and will help to ensure that it is aligned with patient needs.
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Affiliation(s)
- Benjamin Davies
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Oliver Mowforth
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | | | - Bizhan Aarabi
- Division of Neurosurgery, University of Maryland, Baltimore, Maryland, USA
| | - Brian Kwon
- Department of Orthopaedics, University of British Columbia, Vancouver, UK
| | - Shekar Kurpad
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - James S Harrop
- Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA
| | | | - Robert Grossman
- Department of Neurosurgery, Houston Methodist Hospital, Houston, Texas, USA
| | | | - Mark Kotter
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
- Anne McLaren Laboratory for Regenerative Medicine, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
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Wang WG, Dong LM, Li SW. SF36 Is a Reliable Patient-Oriented Outcome Evaluation Tool in Surgically Treated Degenerative Cervical Myelopathy Cases: A Systematic Review and Meta-Analysis. Med Sci Monit 2019; 25:7126-7137. [PMID: 31542788 PMCID: PMC6774268 DOI: 10.12659/msm.916764] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Background Degenerative spinal disorders have adverse impacts on patients’ quality of life. Because the main objectives of any surgical intervention are to improve health-related quality of life and to reduce disability, instruments capable of measuring patient-oriented outcomes are now increasingly used. The aim of this study was to evaluate the use of the Short Form 36 Health Survey Questionnaire (SF36) for assessing patient-oriented outcomes of degenerative cervical myelopathy surgery. Material/Methods A literature search was conducted in electronic databases (Google Scholar, Ovid SP, PubMed, Science Direct, and Springer). Studies were included if they reported SF36 scores by following patients for at least 12 months. Random effects meta-analyses were performed to estimate changes in SF36 physical/mental component summary (SF36-PCS/MCS), SF36 dimensional, Japanese Orthopedics Association (JOA)/modified JOA (mJOA), and Neck Disability Index (NDI) scores by latest follow-up. Results Fourteen studies (1966 patients; age 58.2 years [95% confidence interval (CI), 56.6 to 59.9]; 60% males [95% CI, 55 to 64]; follow-up 24.8 months [95% CI, 20.9 to 28.7]) were included in meta-analysis. SF36-PCS (6.60 [95% CI, 4.91 to 8.28]; p<0.00001), SF36-MCS (6.33 [95% CI, 4.31 to 8.35]; p<0.00001) and SF36 dimensional (p<0.05) scores improved significantly at latest follow-up. Surgery significantly improved JOA/mJOA (3.43 [95% CI, 2.80 to 4.06]; p<0.00001) and NDI (−13.70 [95% CI, −17.35 to −10.06]; p<0.00001) scores also. Change in SF36-PCS score were correlated (r=−0.554) with change in NDI score, whereas change in SF36-MCS score was correlated with change in JOA score (r=0.550). Conclusions Surgery for degenerative cervical myelopathy is associated with significantly improved SF36-measured patient-oriented outcomes.
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Affiliation(s)
- Wen-Ge Wang
- Department of Orthopedics, Linfen Center Hospital, Linfen, Shanxi, China (mainland)
| | - Li-Miao Dong
- Department of Mini-Invasive Orthopedic Surgery, 102 Military Hospital of China, Changzhou, Jiangsu, China (mainland)
| | - Sheng-Wen Li
- Second Department of Orthopedics, Haining People's Hospital, Haining, Zhejiang, China (mainland)
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Abstract
BACKGROUND Cervical spondylotic myelopathy (CSM) is the leading cause of spinal cord impairment. In a public healthcare system, wait times to see spine specialists and eventually access surgical treatment for CSM can be substantial. The goals of this study were to determine consultation wait times (CWT) and surgical wait times (SWT), and identify predictors of wait time length. METHODS Consecutive patients enrolled in the Canadian Spine Outcomes and Research Network (CSORN) prospective and observational CSM study from March 2015 to July 2017 were included. A data-splitting technique was used to develop and internally validate multivariable models of potential predictors. RESULTS A CSORN query returned 264 CSM patients for CWT. The median was 46 days. There were 31% mild, 35% moderate, and 33% severe CSM. There was a statistically significant difference in median CWT between moderate and severe groups; 207 patients underwent surgical treatment. Median SWT was 42 days. There was a statistically significant difference in SWT between mild/moderate and severe groups. Short symptom duration, less pain, lower BMI, and lower physical component score of SF-12 were predictive of shorter CWT. Only baseline pain and medication duration were predictive of SWT. Both CWT and SWT were shorter compared to a concurrent cohort of lumbar stenosis patients (p <0.001). CONCLUSIONS Patients with shorter duration (either symptoms or medication) and less neck pain waited less to see a spine specialist in Canada and to undergo surgical treatment. This study highlights some of the obstacles to overcome in expedited care for this patient population.
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Hilton B, Tempest-Mitchell J, Davies B, Kotter M. Route to diagnosis of degenerative cervical myelopathy in a UK healthcare system: a retrospective cohort study. BMJ Open 2019; 9:e027000. [PMID: 31061045 PMCID: PMC6501948 DOI: 10.1136/bmjopen-2018-027000] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Degenerative cervical myelopathy (DCM) presents insidiously, making initial diagnosis challenging. Surgery has been shown to prevent further disability but existing spinal cord damage may be permanent. Delays in surgery lead to increased disability and reduced postoperative improvements. Therefore, rapid surgical assessment is key to improving patient outcomes. Unfortunately, diagnosis of DCM in primary care is often delayed. This study aimed to characterise patients with DCM route to diagnosis and surgical assessment as well as to plot disease progression over time. DESIGN Retrospective, observational cohort study. SETTING Single, tertiary centre using additional clinical records from primary and secondary care centres. PARTICIPANTS One year of cervical MRI scans conducted at a tertiary neurosciences centre (n=1123) were screened for cervical cord compression, a corresponding clinical diagnosis of myelopathy and sufficient clinical documentation to plot a route to diagnosis (n=43). PRIMARY OUTCOME MEASURES Time to diagnosis from symptom onset, route to diagnosis and disease progression were the primary outcome measures in this study. Disease severity was approximated using a prospectively validated method for inferring modified Japanese Orthopaedic Association (i-mJOA) functional scoring from clinical documentation. RESULTS Patients received a referral to secondary care 6.4±7.7 months after symptom onset. Cervical MRI scanning and neurosurgical review occurred 12.5±13.0 and 15.8±13.5 months after symptom onset, respectively. i-mJOA was 16.0±1.7 at primary care assessment and 14.8±2.5 at surgical assessment. 61.0% of patients were offered operations. For those who received surgery, time between onset and surgery was 22.1±13.2 months. CONCLUSIONS Route to surgical assessment was heterogeneous and lengthy. Some patients deteriorated during this period. This study highlights the need for a streamlined pathway by which patients with cervical cord compression can receive timely assessment and treatment by a specialist. This would improve outcomes for patients using existing treatments.
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Affiliation(s)
- Bryn Hilton
- School of Clinical Medicine, University of Cambridge, Cambridge, UK
| | | | - Benjamin Davies
- Department of Clinical Neurosurgery, University of Cambridge, Cambridge, UK
| | - Mark Kotter
- Department of Clinical Neurosurgery, University of Cambridge, Cambridge, UK
- Department of Clinical Neurosciences, Ann McLaren Laboratory of Regenerative Medicine, Cambridge, UK
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