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Xie D, Chen Q, Zhang Y, Zhao Q, Zang Z, Wu H, Ye C, Song S, Yang L, Yao Q. Development and validation of a prediction model for postoperative pneumonia in patients who received spinal surgery: A retrospective study. Heliyon 2024; 10:e29845. [PMID: 38707354 PMCID: PMC11068526 DOI: 10.1016/j.heliyon.2024.e29845] [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: 09/22/2023] [Revised: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 05/07/2024] Open
Abstract
Objectives To develop and validate a risk prediction model by identifying the preoperative factors associated with an increased risk of pneumonia after spinal surgery. Methods This study included patients with spinal disease from two hospitals between January 2021 and June 2023. The patients were divided into the training and validation sets, which were categorized as postoperative pneumonia (POP) or non-POP, respectively. This study identified the independent risk variables for POP using a multivariate logistic regression analysis. A nomogram prediction model was developed and validated using risk factors, receiver operating characteristic (ROC) curves, calibration curves, and decision curve analysis (DCA) to assess predictive performance. Results Following exclusion, 2223 patients from Changzheng Hospital were enrolled in the training set and 357 patients from the No. 905 Hospital of PLA Navy were enrolled in the validation set. Univariate and multivariate logistic regression analyses revealed that operation time, American Society of Anesthesiologists (ASA) grade, smoking, non-wearing of medical masks, lack of preoperative respiratory training, chronic obstructive pulmonary disease (COPD), underlying diseases, and spinal section were risk factors for POP development in patients with spinal diseases. The area under the ROC curve of the training set was 0.950, whereas that of the validation set was 0.879. The model calibration curves demonstrated good agreement, and the DCA indicated a high expected net benefit value. Conclusion The POP risk prediction model has high accuracy and efficiency in predicting POP in patients with spinal diseases. POP development is influenced by factors such as operation length, ASA grade, smoking, non-wearing of medical masks, lack of preoperative respiratory training, COPD, underlying diseases, and lumbar surgery.
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Affiliation(s)
- Dong Xie
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
- Department of Orthopaedics, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
| | - Qing Chen
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Yao Zhang
- Department of Orthopaedics, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
| | - Qi Zhao
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Zusheng Zang
- Department of Orthopaedics, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
| | - Hao Wu
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Cheng Ye
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
| | - Shaochen Song
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
- Department of Orthopaedics, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
| | - Lili Yang
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, Shanghai, 200003, China
- Department of Orthopaedics, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
| | - Qiuju Yao
- Department of Respiratory Medicine, No. 905 Hospital of PLA Navy, Shanghai, 200052, China
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Lenga P, Gülec G, Bajwa AA, Issa M, Oskouian RJ, Chapman JR, Kiening K, Unterberg AW, Ishak B. Lumbar Decompression versus Decompression and Fusion in Octogenarians: Complications and Clinical Course With 3-Year Follow-Up. Global Spine J 2024; 14:687-696. [PMID: 36148681 PMCID: PMC10802554 DOI: 10.1177/21925682221121099] [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: 11/15/2022] Open
Abstract
STUDY DESIGN Retrospective review. OBJECTIVES This study aimed to assess and compare the clinical course and complications between surgical decompression and decompression with fusion in lumbar spine patients aged ≥80 years. METHODS A retrospective review of electronic medical records at a single institution was conducted between September 2005 and December 2021. Logistic regression was used to identify potential risk factors for the occurrence of complications. RESULTS Over a 16-year period, 327 patients were allocated to the decompression only group and 89 patients were allocated to the decompression and instrumented fusion group. The study had a mean follow-up duration of 36.7 ± 12.4 months. When assessing the CCI, patients of the instrumentation group had fewer comorbidities (8.9 ± .5 points vs 6.2 ± 1.5 points; P < .001), significantly longer surgical duration (290 ± 106 minutes vs 145 ±50.2 minutes; P < .001), significantly higher volume of intraoperative blood loss (791 ± 319.3 ml vs 336.1 ± 150.8 ml; P < .001), more frequent intraoperative blood transfusion (7 ± 2.1% vs 16± 18.0%; P < .001), and extended stays in the intensive care unit and hospitalization rates. Logistic regression analysis revealed that surgical duration and extent of surgery were unique risk factors for the occurrence of complications. CONCLUSIONS Lumbar decompression and additional fusion in octogenarians are considerable treatment techniques; albeit associated with increased complication risks. Prolonged operative time and extent of surgery are critical confounding factors associated with higher rates of postoperative complications. Surgery should only be performed after careful outweighing of potential benefits and risks.
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Affiliation(s)
- Pavlina Lenga
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Gelo Gülec
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Awais A. Bajwa
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | - Mohammed Issa
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | | | | | - Karl Kiening
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
| | | | - Basem Ishak
- Department of Neurosurgery, Heidelberg University Hospital, Heidelberg, Germany
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Cui P, Wang P, Wang J, Liu X, Kong C, Lu S. The Impact of Frailty on Perioperative Outcomes in Patients Receiving Short-Level Posterior Lumbar Interbody Fusion: A Stepwise Propensity Score Matching Analysis. Clin Interv Aging 2022; 17:1297-1306. [PMID: 36046544 PMCID: PMC9422991 DOI: 10.2147/cia.s378327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 08/20/2022] [Indexed: 12/04/2022] Open
Abstract
Background There are many studies on the impact of frailty on postoperative complications; however, there are few studies focusing on stepwise propensity score matching (PSM) to offset the influence of age. Methods We gathered data for patients undergoing short-level posterior lumbar interbody fusion from January to December 2021. According to the Fried frailty phenotype, we categorized patients into non-frail, pre-frail, and frail groups, then, stepwise PSM for age, sex, American Society of Anesthesiologists (ASA) and fusion levels were performed to keep comparable clinical data between groups. Univariate and multivariate logistic regressions were used to determine the impact of clinical demographics on postoperative complications. Results A total of 559 consecutive patients with complete medical records were enrolled (237 males and 322 females; mean age 72.55 ± 5.86 years). After PSM, we found that pre-frail patients were more vulnerable to develop urinary retention (p = 0.031) and surgical site infections (p = 0.021) than non-frail patients. Longer length of stay (LOS), delayed ambulation and removal of urinary catheter times were observed in pre-frail patients. However, there was a significant difference only in LOS between pre-frail and frail patients. Binary logistic regression revealed that C-reactive protein (CRP) and frail status were independently associated with postoperative complications between non-frail and pre-frail patients, while only CRP was independently correlated with complications between pre-frail and frail patients. Conclusion After PSM, we found higher rates of urinary retention and surgical site infections in pre-frail patients than in non-frail patients. CRP was independently related to postoperative complications, while frail status was only independently associated with postoperative complications between pre-frail and non-frail patients. Pre-frail/frail patients tended to have more severe stress responses than non-frail patients.
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Affiliation(s)
- Peng Cui
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
| | - Peng Wang
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
| | - Jialin Wang
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
| | - Xu Liu
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
| | - Chao Kong
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
- Correspondence: Chao Kong; Shibao Lu, Email ;
| | - Shibao Lu
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, People’s Republic of China
- National Clinical Research Center for Geriatric Diseases, Beijing, People’s Republic of China
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Rault F, Briant AR, Kamga H, Gaberel T, Emery E. Surgical management of lumbar spinal stenosis in patients over 80: is there an increased risk? Neurosurg Rev 2022; 45:2385-2399. [PMID: 35243565 DOI: 10.1007/s10143-022-01756-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/06/2022] [Accepted: 02/13/2022] [Indexed: 01/10/2023]
Abstract
Management of lumbar spinal stenosis (LSS) represents the first cause of spinal surgery for the elderly and will increase with the aging population. Although the surgery improves quality of life, the procedure involves anaesthetic and operative risks. The aim of this study was to assess whether the postoperative complication rate was higher for elderly patients and to find confounding factors. We conducted a retrospective study including all LSS surgeries between 2012 and 2020 at the University Hospital of Caen. We compared two populations opposing patients aged over 80 with others. The primary endpoint was the occurrence of a severe complication (SC). Minor complications were the secondary endpoint. Comorbidities, history of lumbar spine surgery and surgical characteristics were recorded. Nine hundred ninety-six patients undergoing surgery for degenerative LSS were identified. Patients over 80 were significantly affected by additional comorbidities: hypertension, heart diseases, higher age-adjusted comorbidity Charlson score, ASA score and use of anticoagulants. Knee-chest position was preferred for younger patients. Older patients underwent a more extensive decompression and had more incidental durotomies. Of the patients, 5.2% presented SC. Age over 80 did not appear to be a significant risk factor for SC, but minor complications increased. Multivariate analysis showed that heart diseases, history of laminectomy, AA-CCI and accidental durotomies were independent risk factors for SC. Surgical management for lumbar spinal stenosis is not associated to a higher rate of severe complications for patients over 80 years of age. However, preoperative risk factors should be investigated to warn the elderly patients that the complication risk is increased although an optimal preparation is the way to avoid them.
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Affiliation(s)
- Frédérick Rault
- Department of Neurosurgery, Caen University Hospital, Avenue de La Côte de Nacre, 14000, Caen, France.
| | - Anaïs R Briant
- Unité de Biostatistique Et Recherche Clinique (UBRC), Avenue de la Côte de Nacre, 14000, Caen, France
| | - Hervé Kamga
- Department of Anesthesiology and Critical Care Medicine, Caen University Hospital, Avenue de La Côte de Nacre, 14000, Caen, France
| | - Thomas Gaberel
- Department of Neurosurgery, Caen University Hospital, Avenue de La Côte de Nacre, 14000, Caen, France
| | - Evelyne Emery
- Department of Neurosurgery, Caen University Hospital, Avenue de La Côte de Nacre, 14000, Caen, France
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Perez-Roman RJ, Lu VM, Govindarajan V, Rivera-Babilonia JM, Leon-Correa R, Ortiz-Cartagena I, Wang MY. Myocardial Infarction After Lumbar Surgery: A Critical Meta-Analysis of Cohort versus Database Studies for a Rare Complication. World Neurosurg 2021; 158:e865-e879. [PMID: 34838767 DOI: 10.1016/j.wneu.2021.11.086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 11/21/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND One potentially fatal complication of spine surgery is myocardial infarction (MI). There is still uncertainty of the true incidence of MI within subsets of spine surgeries. The aim of this study was to survey the contemporary spine literature and ascertain the true incidence of MI after lumbar spine surgery, as well as to provide commentary on the inherent assumptions made when interpreting cohort versus database studies on this topic. METHODS A systematic search of 4 electronic databases from inception to November 2020 was conducted following PRISMA guidelines. Articles were screened against prespecified criteria. MI incidence was then estimated by random-effects meta-analyses of proportions based on cohort versus database studies. RESULTS A total of 34 cohort studies and 32 database studies describing 767,326 lumbar procedures satisfied all criteria for selection. There were 12,170 (2%) cases from cohort studies and 755,156 (98%) cases from database studies. Cohort studies reported a significantly older patient cohort (P < 0.01) and longer follow-up period than did database studies (P < 0.03). Using cohort studies only, the incidence of MI was 0.44% (P heterogeneity < 0.01), whereas using database studies only, the incidence of MI was 0.41% (P heterogeneity < 0.01). These 2 incidences were statistically different (P interaction = 0.01). Bias analysis indicated that cohort studies were more vulnerable to small-study biases than were database studies. CONCLUSIONS Although infrequent, the incidence of MI after lumbar spine surgery is unequivocally nonzero. Furthermore, the literature on this topic remains skewed based on study type, and translation of academic findings into practice should be wary of this.
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Affiliation(s)
- Roberto J Perez-Roman
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA.
| | - Victor M Lu
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Vaidya Govindarajan
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | | | - Roberto Leon-Correa
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | | | - Michael Y Wang
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
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Ankrah NK, Eli IM, Magge SN, Whitmore RG, Yew AY. Age, body mass index, and osteoporosis are more predictive than imaging for adjacent-segment reoperation after lumbar fusion. Surg Neurol Int 2021; 12:453. [PMID: 34621568 PMCID: PMC8492407 DOI: 10.25259/sni_667_2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/05/2021] [Indexed: 11/05/2022] Open
Abstract
Background: Adjacent-segment disease (ASD) is a well-described long-term complication after lumbar fusion. There is a lack of consensus about the risk factors for development of ASD, but identifying them could improve surgical outcomes. Our goal was to analyze the effect of patient characteristics and radiographic parameters on the development of symptomatic ASD requiring revision surgery after posterior lumbar fusion. Methods: In this retrospective cohort study, we identified patients who underwent lumbar fusion surgery and revision surgery from May 2012 to November 2018 using an institutional lumbar fusion registry. Patients having both pre- and post-operative upright radiographs were included in the study. Revision surgeries for which the index operation was performed at an outside hospital were excluded from analysis. Univariate analysis was conducted on candidate variables, and variables with P< 0.2 were selected for multivariate logistic regression. Results: Of the 106 patients identified, 21 required reoperation (29 months average follow-up). Age >65 years (OR 4.14, 95% CI 1.46–11.76, P= 0.008), body mass index (BMI) >34 (OR 1.13, 95% CI 1.04–1.23, P = 0.004), and osteoporosis (OR 14, 95% CI 1.38–142.42, P = 0.03) were independent predictors of reoperation in the multivariate analysis. Increased facet diastasis at fusion levels (OR 0.60, 95% CI 0.42–0.85, P = 0.004) was associated with reduced reoperation rates. Change in segmental LL at the index operation level, rostral and caudal facet diastasis, vacuum discs, and T2 hyperintensity in the facets were not predictors of reoperation. Conclusion: Age >65, BMI >34, and osteoporosis were independent predictors of adjacent-segment reoperation after lumbar spinal fusion.
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Affiliation(s)
- Nii-Kwanchie Ankrah
- Department of Neurosurgery, Lahey Clinic, Burlington, Massachusetts, United States
| | - Ilyas M Eli
- Department of Neurosurgery, University of Utah, Clinical Neurosciences Center, Salt Lake City, Utah, United States
| | - Subu N Magge
- Department of Neurosurgery, Lahey Clinic, Burlington, Massachusetts, United States
| | - Robert G Whitmore
- Department of Neurosurgery, Lahey Clinic, Burlington, Massachusetts, United States
| | - Andrew Y Yew
- Department of Neurosurgery, Lahey Clinic, Burlington, Massachusetts, United States
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7
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Wagner A, Haag E, Joerger AK, Gempt J, Krieg SM, Wostrack M, Meyer B. Cement-Augmented Carbon Fiber-Reinforced Pedicle Screw Instrumentation for Spinal Metastases: Safety and Efficacy. World Neurosurg 2021; 154:e536-e546. [PMID: 34339894 DOI: 10.1016/j.wneu.2021.07.092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate the complication rates and long-term implant failure rates in a monocentric study of a consecutive cohort of patients with thoracolumbar spinal metastases after posterior instrumentation with a fenestrated carbon fiber-reinforced poly-ether-ether-ketone (CFRP) pedicle screw system. METHODS We retrospectively reviewed demographics, Karnofsky Performance Status Scale scores, complications, and implant failure rates. RESULTS Between June 2016 and November 2019, 51 consecutive patients underwent cement-augmented CFRP pedicle screw instrumentation at our institution. Mean age was 68 years (standard deviation 10.5), the median preoperative Karnofsky Performance Status Scale of 80 increased to 90 postoperatively (P = 0.471). Most common primary entities were breast (25.5%), lung (15.7%), and prostate (13.7%) cancers. Of 428 placed screws, 293 (68.5%) were augmented with polymethylmethacrylate, a mean 6 per patient (standard deviation ±2). Screws were inserted via a minimally invasive system technique in 54.9% of cases. In total, 11.8% of patients had immediate postoperative sequelae related to the cement. Pulmonary cement embolisms were noted in 3 patients, 2 had paravertebral extravasation, and 1 had an embolism into a segmental artery. Of these 6, 2 patients with pulmonary embolisms reported related symptoms. Follow-up was available for 80.4%. After a mean 9.8 months, screw loosening was noted in 11.8% of cases on computed tomography, although it was asymptomatic in all but 1 patient. Screw pull-out did not occur. Neither cement-related (P = 0.353) nor general complication rates (P = 0.507) differed significantly between open and minimally invasive system techniques. CONCLUSIONS Percutaneous cement-augmented CFRP pedicle screw instrumentation facilitates artifact-reduced postoperative imaging, while maintaining a risk profile and implant failure rates comparable to conventional metallic instrumentation.
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Affiliation(s)
- Arthur Wagner
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany.
| | - Elena Haag
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Ann-Kathrin Joerger
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Jens Gempt
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Sandro M Krieg
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Maria Wostrack
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
| | - Bernhard Meyer
- Department of Neurosurgery, Technical University Munich School of Medicine, Munich, Germany
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Bays A, Stieger A, Held U, Hofer LJ, Rasmussen-Barr E, Brunner F, Steurer J, Wertli MM. The influence of comorbidities on the treatment outcome in symptomatic lumbar spinal stenosis: A systematic review and meta-analysis. NORTH AMERICAN SPINE SOCIETY JOURNAL 2021; 6:100072. [PMID: 35141637 PMCID: PMC8820012 DOI: 10.1016/j.xnsj.2021.100072] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Lumbar spinal stenosis (LSS) affects mainly elderly patients. To this day, it is unclear whether comorbidities influence treatment success. The aim of this systematic review and meta-analysis was to assess the impact of comorbidities on the treatment effectiveness in symptomatic LSS. METHODS We conducted a systematic review and meta-analysis and reviewed prospective or retrospective studies from Medline, Embase, Cochrane Library and CINAHL from inception to May 2020, including adult patients with LSS undergoing surgical or conservative treatment. Main outcomes were satisfaction, functional and symptoms improvement, and adverse events (AE). Proportions of outcomes within two subgroups of a comorbidity were compared with risk ratio (RR) as summary measure. Availability of ≥3 studies for the same subgroup and outcome was required for meta-analysis. RESULTS Of 72 publications, 51 studies, mostly assessing surgery, there was no evidence reported that patients with comorbidities were less satisfied compared to patients without comorbidities (RR 1.06, 95% confidence interval (CI) 0.77 to 1.45, I 2 94%), but they had an increased risk for AE (RR 1.46, 95% CI 1.06 to 2.01, I 2 72%). A limited number of studies found no influence of comorbidities on functional and symptoms improvement. Older age did not affect satisfaction, symptoms and functional improvement, and AE (age >80 years RR 1.22, 95% CI 0.98 to 1.52, I 2 60%). Diabetes was associated with more AE (RR 1.72, 95% CI 1.19 to 2.47, I 2 58%). CONCLUSION In patients with LSS and comorbidities (in particular diabetes), a higher risk for AE should be considered in the treatment decision. Older age alone was not associated with an increased risk for AE, less functional and symptoms improvement, and less treatment satisfaction.
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Affiliation(s)
- Amandine Bays
- Department of General Internal Medicine, University Hospital of Bern, Inselspital, Freiburgstrasse 18, 3010 Bern, Switzerland
| | - Andrea Stieger
- Department of General Internal Medicine, University Hospital of Bern, Inselspital, Freiburgstrasse 18, 3010 Bern, Switzerland
| | - Ulrike Held
- Department of Biostatistics at Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, 8001 Zurich, Switzerland
| | - Lisa J Hofer
- Department of Biostatistics at Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Hirschengraben 84, 8001 Zurich, Switzerland
| | - Eva Rasmussen-Barr
- Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Division of Physiotherapy, Huddinge, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Box 210, 171 77 Stockholm, Sweden
| | - Florian Brunner
- Department of Physical Medicine and Rheumatology, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland
| | - Johann Steurer
- Horten Centre for Patient Oriented Research and Knowledge Transfer, Department of Internal Medicine, University of Zurich, Pestalozzistrasse 24, 8032 Zurich, Switzerland
| | - Maria M Wertli
- Department of General Internal Medicine, University Hospital of Bern, Inselspital, Freiburgstrasse 18, 3010 Bern, Switzerland
- Horten Centre for Patient Oriented Research and Knowledge Transfer, Department of Internal Medicine, University of Zurich, Pestalozzistrasse 24, 8032 Zurich, Switzerland
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