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Smith JS, Elias E, Sursal T, Line B, Lafage V, Lafage R, Klineberg E, Kim HJ, Passias P, Nasser Z, Gum JL, Eastlack R, Daniels A, Mundis G, Hostin R, Protopsaltis TS, Soroceanu A, Hamilton DK, Kelly MP, Lewis SJ, Gupta M, Schwab FJ, Burton D, Ames CP, Lenke LG, Shaffrey CI, Bess S. How Good Are Surgeons at Achieving Their Preoperative Goal Sagittal Alignment Following Adult Deformity Surgery? Global Spine J 2024; 14:1924-1936. [PMID: 36821516 PMCID: PMC11418663 DOI: 10.1177/21925682231161304] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
STUDY DESIGN Multicenter, prospective cohort. OBJECTIVES Malalignment following adult spine deformity (ASD) surgery can impact outcomes and increase mechanical complications. We assess whether preoperative goals for sagittal alignment following ASD surgery are achieved. METHODS ASD patients were prospectively enrolled based on 3 criteria: deformity severity (PI-LL ≥25°, TPA ≥30°, SVA ≥15 cm, TCobb≥70° or TLCobb≥50°), procedure complexity (≥12 levels fused, 3-CO or ACR) and/or age (>65 and ≥7 levels fused). The surgeon documented sagittal alignment goals prior to surgery. Goals were compared with achieved alignment on first follow-up standing radiographs. RESULTS The 266 enrolled patients had a mean age of 61.0 years (SD = 14.6) and 68% were women. Mean instrumented levels was 13.6 (SD = 3.8), and 23.2% had a 3-CO. Mean (SD) offsets (achieved-goal) were: SVA = -8.5 mm (45.6 mm), PI-LL = -4.6° (14.6°), TK = 7.2° (14.7°), reflecting tendencies to undercorrect SVA and PI-LL and increase TK. Goals were achieved for SVA, PI-LL, and TK in 74.4%, 71.4%, and 68.8% of patients, respectively, and was achieved for all 3 parameters in 37.2% of patients. Three factors were independently associated with achievement of all 3 alignment goals: use of PACs/equivalent for surgical planning (P < .001), lower baseline GCA (P = .009), and surgery not including a 3-CO (P = .037). CONCLUSIONS Surgeons failed to achieve goal alignment of each sagittal parameter in ∼25-30% of ASD patients. Goal alignment for all 3 parameters was only achieved in 37.2% of patients. Those at greatest risk were patients with more severe deformity. Advancements are needed to enable more consistent translation of preoperative alignment goals to the operating room.
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Affiliation(s)
- Justin S. Smith
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Elias Elias
- Department of Neurosurgery, University of Texas Southwestern, Dallas, TX, USA
| | - Tolga Sursal
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
| | - Breton Line
- Department of Orthopedic Surgery, Presbyterian St Lukes Medical Center, Denver, CO, USA
| | - Virginie Lafage
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
| | - Renaud Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York City, NY, USA
| | - Eric Klineberg
- Department of Orthopaedic Surgery, University of California, Davis, Sacramento, CA, USA
| | - Han Jo Kim
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York City, NY, USA
| | - Peter Passias
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, New York, NY, USA
| | - Zeina Nasser
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Hadath, Lebanon
| | - Jeffrey L. Gum
- Department of Orthopedic Surgery, Leatherman Spine Center, Louisville, KY, USA
| | - Robert Eastlack
- Department of Orthopedic Surgery, Scripps Clinic, San Diego, CA, USA
| | - Alan Daniels
- Department of Orthopedic Surgery, Brown University, Providence, RI, USA
| | - Gregory Mundis
- Department of Orthopedic Surgery, Scripps Clinic, San Diego, CA, USA
| | - Richard Hostin
- Department of Orthopaedic Surgery, Baylor Scoliosis Center, Plano, TX, USA
| | | | - Alex Soroceanu
- Department of Orthopedic Surgery, University of Calgary, Calgary, AB, Canada
| | | | - Michael P. Kelly
- Department of Orthopedic Surgery, Rady Children’s Hospital, San Diego, CA, USA
| | - Stephen J. Lewis
- Department of Surgery, Division of Orthopedic Surgery, University of Toronto and Toronto Western Hospital, Toronto, ON, Canada
| | - Munish Gupta
- Department of Orthopedic Surgery, Washington University, St Louis, MO, USA
| | - Frank J Schwab
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
| | - Douglas Burton
- Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, KA, USA
| | - Christopher P. Ames
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA
| | - Lawrence G. Lenke
- Department of Orthopedic Surgery, Columbia University Medical Center, New York, NY, USA
| | | | - Shay Bess
- Department of Orthopedic Surgery, Presbyterian St Lukes Medical Center, Denver, CO, USA
| | - on behalf of International Spine Study Group
- Department of Neurosurgery, University of Virginia, Charlottesville, VA, USA
- Department of Neurosurgery, University of Texas Southwestern, Dallas, TX, USA
- Department of Orthopedic Surgery, Presbyterian St Lukes Medical Center, Denver, CO, USA
- Department of Orthopedic Surgery, Lennox Hill Hospital, New York City, NY, USA
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York City, NY, USA
- Department of Orthopaedic Surgery, University of California, Davis, Sacramento, CA, USA
- Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, New York, NY, USA
- Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Hadath, Lebanon
- Department of Orthopedic Surgery, Leatherman Spine Center, Louisville, KY, USA
- Department of Orthopedic Surgery, Scripps Clinic, San Diego, CA, USA
- Department of Orthopedic Surgery, Brown University, Providence, RI, USA
- Department of Orthopaedic Surgery, Baylor Scoliosis Center, Plano, TX, USA
- Department of Orthopedic Surgery, University of Calgary, Calgary, AB, Canada
- Department of Neurosurgery, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Orthopedic Surgery, Rady Children’s Hospital, San Diego, CA, USA
- Department of Surgery, Division of Orthopedic Surgery, University of Toronto and Toronto Western Hospital, Toronto, ON, Canada
- Department of Orthopedic Surgery, Washington University, St Louis, MO, USA
- Department of Orthopaedic Surgery, University of Kansas Medical Center, Kansas City, KA, USA
- Department of Neurological Surgery, University of California, San Francisco, San Francisco, CA, USA
- Department of Orthopedic Surgery, Columbia University Medical Center, New York, NY, USA
- Departments of Neurosurgery and Orthopedic Surgery, Duke University, Durham, NC, USA
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Falk DP, Agrawal R, Dehghani B, Bhan R, Gupta S, Gupta MC. Instrumentation Failure in Adult Spinal Deformity Patients. J Clin Med 2024; 13:4326. [PMID: 39124593 PMCID: PMC11313364 DOI: 10.3390/jcm13154326] [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: 07/04/2024] [Revised: 07/21/2024] [Accepted: 07/22/2024] [Indexed: 08/12/2024] Open
Abstract
In recent years, advances in the surgical treatment of adult spinal deformity (ASD) have led to improved outcomes. Although these advances have helped drive the development of deformity surgery to meet the rising volume of patients seeking surgical treatment, many challenges have yet to be solved. Instrumentation failure remains one of the most common major complications following deformity surgery, associated with significant morbidity due to elevated re-operation rates among those experiencing mechanical complications. The two most frequently encountered subtypes of instrumentation failure are rod fracture (RF) and proximal junctional kyphosis/proximal junctional failure (PJK/PJF). While RF and PJK/PJF are both modes of instrumentation failure, they are two distinct entities with different clinical implications and treatment strategies. Considering that RF and PJK/PJF continue to represent a major challenge for patients with ASD and deformity surgeons alike, this review aims to discuss the incidence, risk factors, clinical impact, treatment strategies, preventive measures, and future research directions for each of these substantial complications.
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Affiliation(s)
- David P. Falk
- Department of Orthopaedic Surgery, Washington University in St. Louis, 660 South Euclid Ave, MSC 8233-04-05, St. Louis, MO 63110, USA (M.C.G.)
| | - Ravi Agrawal
- Department of Orthopaedic Surgery, Washington University in St. Louis, 660 South Euclid Ave, MSC 8233-04-05, St. Louis, MO 63110, USA (M.C.G.)
| | - Bijan Dehghani
- Hospital of the University of Pennsylvania, Department of Orthopaedic Surgery, 3737 Market Street, Philadelphia, PA 19104, USA
| | - Rohit Bhan
- Department of Orthopaedic Surgery, Washington University in St. Louis, 660 South Euclid Ave, MSC 8233-04-05, St. Louis, MO 63110, USA (M.C.G.)
| | - Sachin Gupta
- Hospital of the University of Pennsylvania, Department of Orthopaedic Surgery, 3737 Market Street, Philadelphia, PA 19104, USA
| | - Munish C. Gupta
- Department of Orthopaedic Surgery, Washington University in St. Louis, 660 South Euclid Ave, MSC 8233-04-05, St. Louis, MO 63110, USA (M.C.G.)
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Mathew J, Zuckerman SL, Lin H, Marciano G, Simhon M, Cerpa M, Lee NJ, Boddapati V, Lehman RA, Sardar ZM, Dyrszka MD, Lombardi JM, Lenke LG. Living with a C2-Sacrum Spinal Fusion: Surgical Outcomes and Quality of Life in Patients Fused from C2 to the Sacrum. Global Spine J 2024; 14:1542-1551. [PMID: 36604815 PMCID: PMC11394517 DOI: 10.1177/21925682221149389] [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: 01/07/2023] Open
Abstract
STUDY DESIGN Single center, retrospective cohort study. OBJECTIVES Little is known about the surgical outcomes and quality of life in patients with C2-sacrum posterior spinal fusion (PSF). Though it is thought to be a "final" construct, it remains unknown how patients fare postoperatively. We sought to evaluate the surgical outcomes and quality of life of patients after C2-sacrum PSF. METHODS Consecutive patients undergoing C2-Sacrum PSF from 2015-2020 by 4 surgeons at a single institution were included. The study time period for each patient began after their index operation that led to the C2-sacrum fusion. Dates of surgery, complications, reoperations, patient reported outcomes (PROs) including EuroQol 5 Dimensions (EQ-5D), Oswestry Disability Index (ODI), Scoliosis Research Society (SRS) questionnaires, and activities of daily living (ADL) questions were collected and analyzed. Descriptive statistics, paired t-tests, student t-tests, and linear regression were used. RESULTS Of the 23 patients who underwent C2-sacrum PSF, 6 patients (26%) required a total of 10 reoperations after a mean of 1.5 years (range 0-4 years) after C2-sacrum PSF. Five reoperations were for mechanical failure; 3 for wound complications/infection; and 2 for instrumentation and spinous process prominence. PROs were collected on 18 patients with mean follow-up of 2.4 years (range .5-4.5) after their C2-sacrum PSF. At 6-months, both SRS-22 and ODI scores improved significantly after C2-sacrum PSF (SRS: 57.5 to 76.3, P = .0014; ODI: 47.0 to 31.7, P = .013). Similarly, at a mean 2.4 years postoperatively, mean ODI improved significantly (47.0 to 30.4, P = .0032). Six patients (33%) had minimal symptoms (ODI <20). The median postoperative EQ-5D score was .74 (range .19 to 1.0), which compares favorably to patients with hip/knee osteoarthritis (EQ-5D .63) and diabetes mellitus (DM) (EQ-5D .69) and hypertension (HTN). In terms of activities of daily living (ADL), 10 patients (56%) exercised regularly-a mean 4.5 days/week. 11 (61%) could do light aerobic activity (e.g. stationary bike). 10 (55%) were able to play with children/grandchildren as desired. Eight patients (44%) hiked, and 2 (11%) drove independently. 11 (61%) could tolerate short air-travel comfortably. Of the 17 patients who could toilet and perform basic hygiene preoperatively, 16 (94%) were able to do so postoperatively. CONCLUSION Though C2-sacrum PSF is thought to be a "final" construct, approximately 1 in 4 patients require subsequent operations. However, C2-sacrum PSF patients had a significant improvement in SRS and ODI scores by 6 months postop. Over 60% of patients were regularly performing light aerobic activity 2 years after their C2-sacrum PSF. EQ-5D suggests that this population fares better than those with degenerative hip/knee arthritis and similarly to those with common chronic conditions like DM and HTN.
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Affiliation(s)
- Justin Mathew
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Scott L Zuckerman
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Hannah Lin
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Gerard Marciano
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Matthew Simhon
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Meghan Cerpa
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Nathan J Lee
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Venkat Boddapati
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Ronald A Lehman
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Zeeshan M Sardar
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Marc D Dyrszka
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Joseph M Lombardi
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
| | - Lawrence G Lenke
- Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY, USA
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Azam F, Shukla I, Hicks WH, Anand S, Furtado K, Smith PD, Hall K, Akbik OS, Bagley CA. A 3-Year Study Investigating the Utility of Patient-Reported Outcomes Measurement Information System-29 for Long-Term Follow-Up in Adult Spinal Deformity. World Neurosurg 2024; 186:e506-e513. [PMID: 38583560 DOI: 10.1016/j.wneu.2024.03.165] [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: 12/18/2023] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND Adult spinal deformity (ASD) significantly impacts the quality of life due to three-dimensional spinal abnormalities. Patient-reported outcome measures, such as the Patient-Reported Outcomes Measurement Information System (PROMIS-29), play a crucial role in assessing postoperative outcomes. This study aims to investigate trends in PROMIS-29 scores over 36 months in patients undergoing long-segment thoracolumbar fusion for ASD and provide insights into its long-term utility. METHODS A retrospective study including 163 ASD patients undergoing long-segment thoracolumbar fusion was conducted. PROMIS-29 scores were collected at baseline and at postoperative (0-), 3-, 6-, 12-, 18-, 24-, 30-, and 36-month follow-ups. Statistical analyses was performed to assess significant score changes from baseline and in consecutive recordings. RESULTS Significant improvements in all PROMIS-29 categories were observed at 36 months, with the greatest changes in pain intensity (-35.19%, P < 0.001), physical function (+29.13%, P < 0.001), and pain interference (-28.8%, P < 0.001). Between the 0 and 3 month mark, the greatest significant changes were recorded in pain intensity (-26.5%, P < 0.001), physical function (+24.3%, P < 0.001), and anxiety (-16.9%, P < 0.018). However, scores plateaued after the 3-month mark, with zero categories showing significant changes with subsequent consecutive recordings. CONCLUSIONS PROMIS-29 scores demonstrated notable improvements in ASD patients particularly in pain intensity, pain interference, and physical function. However, scores plateaued beyond the 3-month mark, suggesting PROMIS-29's limited sensitivity to nuanced changes in long-term patient recovery. Future investigations exploring optimal combinations of patient reported outcome measures for comprehensive short- and long-term outcome assessments in ASD surgery would be beneficial.
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Affiliation(s)
- Faraaz Azam
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ishav Shukla
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - William H Hicks
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Soummitra Anand
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Kailee Furtado
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Parker D Smith
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Kristen Hall
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Omar S Akbik
- Department of Neurological Surgery, CHI Health, Omaha, NE, USA; Department of Neurological Surgery, Saint Luke's Neurological & Spine Surgery, Kansas City, MO, USA
| | - Carlos A Bagley
- Department of Neurological Surgery, Saint Luke's Neurological & Spine Surgery, Kansas City, MO, USA.
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Madelar RTR, Oe S, Yamato Y, Hasegawa T, Yoshida G, Banno T, Arima H, Ide K, Yamada T, Kurosu K, Nakai K, Matsuyama Y. 5-year outcomes of surgical intervention in patients with adult spine deformity according to preoperative 5-item modified frailty index scores. Spine Deform 2024; 12:763-774. [PMID: 38367170 DOI: 10.1007/s43390-024-00823-0] [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: 05/01/2023] [Accepted: 01/06/2024] [Indexed: 02/19/2024]
Abstract
PURPOSE Frailty increases vulnerability to dependency and/or death, and is important in predicting the risk for adverse effects following adult spinal deformity (ASD) surgery. For easy determination of frailty, the 5-item modified frailty index (mFI-5) was established. However, there are few reports that show the relationship between frailty and mid-term operative outcomes after ASD surgery. The objective of this retrospective study is to determine the correlation of frailty using mFi-5 scores with postoperative medical complications, patient reported outcome measures (PROMs), and radiographic alignment 5 years after ASD surgery. METHODS 208 patients were divided into robust (R), pre-frail (PF), and frail (F) groups based on mFI-5 scores. Postoperative medical complications, preoperative and 5-year follow-up PROMs and radiographic alignment were evaluated. RESULTS The study included 91, 79, and 38 patients in group R, PF, and F, respectively. There was no significant difference in age and sex. Discharge to care facility (16 (18%):21 (27%):16 (42%), p = 0.014) and postoperative cardiac complications (2 (2%):0 (0%):3 (8%), p = 0.031) were higher in frail patients. Preoperative ODI (38.3:45.3:54.7, p < 0.001) and SRS-22 (2.7:2.5:2.3, p = 0.004), 5-year postoperative ODI (27:27.2:37.9, p = 0.015), 5-year postoperative SVA (57.8°:78.5°:86.4°, p = 0.039) and 5-year postoperative TPA (23.9°:29.4°:29.5°, p = 0.011) were significantly worse in group F compared to group R. CONCLUSION Postoperatively, frail patients are more likely to have cardiac complications, inferior PROMs and deterioration of post-correction global spinal alignment. Preoperative assessment using mFI-5 is beneficial to individualize risks, optimize patients, and manage postoperative expectations. LEVEL OF EVIDENCE: 3
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Affiliation(s)
- Rina Therese R Madelar
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan.
- Department of Orthopedics, The Medical City, Ortigas Avenue, Pasig City, Philippines.
| | - Shin Oe
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- Department of Orthopedic Surgery and Division of Geriatric Musculoskeletal Health, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yu Yamato
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
- Department of Orthopedic Surgery and Division of Geriatric Musculoskeletal Health, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tomohiko Hasegawa
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Go Yoshida
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Tomohiro Banno
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Hideyuki Arima
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Koichiro Ide
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Tomohiro Yamada
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Kenta Kurosu
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Keiichi Nakai
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
| | - Yukihiro Matsuyama
- Department of Orthopedic Surgery, Hamamatsu University School of Medicine, 1-20-1 Handayama Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan
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Mohanty S, Sardar ZM, Hassan FM, Lombardi JM, Lehman RA, Lenke LG. Impact of Teriparatide on Complications and Patient-Reported Outcomes of Patients Undergoing Long Spinal Fusion According to Bone Density. J Bone Joint Surg Am 2024; 106:206-217. [PMID: 37973052 DOI: 10.2106/jbjs.23.00272] [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] [Indexed: 11/19/2023]
Abstract
BACKGROUND Surgery for adult spinal deformity (ASD) poses substantial risks, including the development of symptomatic pseudarthrosis, which is twice as prevalent among patients with osteoporosis compared with those with normal bone mineral density (BMD). Limited data exist on the impact of teriparatide, an osteoanabolic compound, in limiting the rates of reoperation and pseudarthrosis after treatment of spinal deformity in patients with osteoporosis. METHODS Osteoporotic patients on teriparatide (OP-T group) were compared with patients with osteopenia (OPE group) and those with normal BMD. OP-T patients were matched with OPE patients and patients with normal BMD at a 1:2:2 ratio. All patients had a minimum 2-year follow-up and underwent posterior spinal fusion (PSF) involving >7 instrumented levels. The primary outcome was the 2-year reoperation rate. Secondary outcomes included pseudarthrosis with or without implant failure, proximal junctional kyphosis (PJK), and changes in patient-reported outcomes (PROs). Clinical outcomes were analyzed using conditional logistic regression. Changes in PROs were analyzed using a mixed-effects model. RESULTS Five hundred and forty patients (52.6% normal BMD, 32.9% OPE, 14.4% OP-T) were included. In the unmatched cohort, 2-year reoperation rates (odds ratio [OR] = 0.45 [95% confidence interval (CI): 0.20 to 0.91]) and pseudarthrosis rates (OR = 0.25 [95% CI: 0.08 to 0.61]) were significantly lower in the OP-T group than the OPE group. Seventy-eight patients in the OP-T group were matched to 156 patients in the OPE group. Among these matched patients, at 2 years, 23.1% (36) in the OPE group versus 11.5% (9) in the OP-T group had a reoperation (OR = 0.45, p = 0.0188), 21.8% (34) versus 6.4% (5) had pseudarthrosis with or without implant failure (OR = 0.25, p = 0.0048), and 6.4% (10) versus 7.7% (6) had PJK (OR = 1.18, p = 0.7547), respectively. At 2 years postoperatively, PROs were better among OP-T patients than OPE patients. Subsequently, 78 patients in the OP-T group were matched to 156 patients in the normal BMD group. Among these matched patients, there was no significant difference in 2-year reoperation (OR = 0.85 [95% CI: 0.37 to 1.98]), pseudarthrosis (OR = 0.51 [95% CI: 0.181 to 1.44]), and PJK rates (OR = 0.77 [95% CI: 0.28 to 2.06). CONCLUSIONS Osteoporotic patients on teriparatide demonstrated lower reoperation and symptomatic pseudarthrosis rates 2 years postoperatively compared with osteopenic patients. Moreover, patient-reported and clinical outcomes for osteoporotic patients on teriparatide were not different from those for patients with normal BMD. LEVEL OF EVIDENCE Therapeutic Level III . See Instructions for Authors for a complete description of levels of evidence.
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Affiliation(s)
- Sarthak Mohanty
- Department of Orthopaedic Surgery, Och Spine Hospital, Columbia University Irving Medical Center, New York, NY
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Azam F, Anand S, Dragun A, Furtado K, Nguyen M, Shukla I, Hicks WH, Hall K, Akbik OS, Bagley CA. Identifying Correlation Among Patient-Reported Outcome Measures: A Study of PROMIS-29, ODI, and VAS in Adult Spinal Deformity Patients. World Neurosurg 2024; 181:e1059-e1070. [PMID: 37967743 DOI: 10.1016/j.wneu.2023.11.039] [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: 09/07/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/17/2023]
Abstract
BACKGROUND Adult spinal deformity (ASD) is becoming increasingly common in aging populations. Patient-reported outcome measures (PROMs) are self-reported patient surveys administered pre- and postoperatively that provide insight into patient improvement. We aim to compare 3 of the most utilized PROMs: PROMIS-29, Oswestry Disability Index (ODI), and Visual Analogue Scale (VAS), to investigate whether they provide unique and independent assessments of patient outcomes when assessed longitudinally. METHODS We retrospectively reviewed a database of ASD at UT Southwestern Medical Center between 2016 and 2021. Adult patients (>18 years old) were included if they underwent long-segment (>4 levels) thoracolumbar fusion. PROMIS-29, ODI, and VAS scores were collected preoperatively and at 3-, 6-, 12-, 18-, 24-, 30-, and 36-month follow-ups. Scores were recorded ±1 month of the time points. Pearson correlation coefficients for each PROM were then calculated in a pairwise fashion. RESULTS A total of 163 patients were included in our analysis. ODI and VAS showed significant covariance, with VAS Neck and VAS Back having Pearson coefficients of 0.95 and 0.94, respectively. ODI and PROMIS-29 also showed significant covariance, with Physical Function and ODI showing a Pearson coefficient of 0.95. PROMIS-29 and VAS demonstrated less correlation regarding Pain and Physical Function; however, they showed a significantly high Pearson coefficient when comparing VAS Back with PROMIS-29 Sleep and Pain Intensity (r = 0.97 and r = 0.96, respectively). CONCLUSIONS All 3 PROMs demonstrated significant correlation over 36 months, indicating that simultaneous administration of each during follow-up is redundant. The measure that provided the least unique information was ODI, as both VAS and PROMIS-29 demonstrated similar progression and assessed additional metrics. PROMIS-29 provided the same information as VAS and ODI, with extra facets of patient-reported outcomes, indicating that it may be a more comprehensive measure of longitudinal patient improvement.
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Affiliation(s)
- Faraaz Azam
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Soummitra Anand
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Anthony Dragun
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Kailee Furtado
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Madelina Nguyen
- Department of Neurological Surgery, University of Texas Medical Branch, Galveston, Texas, USA
| | - Ishav Shukla
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - William H Hicks
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Kristen Hall
- Department of Neurological Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Omar S Akbik
- Department of Neurological Surgery, CHI Health, Omaha, Nebraska, USA
| | - Carlos A Bagley
- Department of Neurological Surgery, Saint Luke's Neurological & Spine Surgery, Kansas City, Missouri, USA.
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8
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Germscheid N, Cheung JPY, Neva MH, Öner FC, Kwon BK, Valacco M, Awwad W, Sciubba DM, Lewis SJ, Rhines LD, Yoon ST, Alini M, Grad S, Fisher CG, Samartzis D. Research Practices and Needs Among Spine Surgeons Worldwide. Global Spine J 2023; 13:1894-1908. [PMID: 34870488 PMCID: PMC10556911 DOI: 10.1177/21925682211058158] [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
OBJECTIVE Resource allocation to research activities is challenging and there is limited evidence to justify decisions. Members of AO Spine were surveyed to understand the research practices and needs of spine surgeons worldwide. METHODS An 84-item survey was distributed to the AO Spine community in September of 2020. Respondent demographics and insights regarding research registries, training and education, mentorship, grants and financial support, and future directions were collected. Responses were anonymous and compared among regions. RESULTS A total of 333 spine surgeons representing all geographic regions responded; 52.3% were affiliated with an academic/university hospital, 91.0% conducted clinical research, and 60.9% had 5+ years of research experience. There was heterogeneity among research practices and needs across regions. North American respondents had more research experience (P = .023), began conducting research early on (P < .001), had an undergraduate science degree (P < .001), and were more likely to have access to a research coordinator or support staff (P = .042) compared to other regions. While all regions expressed having the same challenges in conducting research, Latin America, and Middle East/Northern Africa respondents were less encouraged to do research (P < .001). Despite regional differences, there was global support for research registries and research training and education. CONCLUSION To advance spine care worldwide, spine societies should establish guidelines, conduct studies on pain management, and support predictive analytic modeling. Tailoring local/regional programs according to regional needs is advised. These results can assist spine societies in developing long-term research strategies and provide justified rationale to governments and funding agencies.
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Affiliation(s)
| | - Jason P. Y. Cheung
- Department of Orthopaedics & Traumatology, The University of Hong Kong, Hong Kong
| | - Marko H. Neva
- Department of Orthopaedic and Trauma Surgery, Tampere University Hospital, Tampere, Finland
| | - F. Cumhur Öner
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Brian K. Kwon
- Division of Spine, Department of Orthopaedics, University of British Columbia,Vancouver General Hospital Vancouver, BC, Canada
| | - Marcelo Valacco
- Department of Orthopaedics, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Waleed Awwad
- Department of Orthopaedics, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Daniel M. Sciubba
- Department of Neurosurgery, Zucker School of Medicine at Hofstra, Northwell Health, Long Island Jewish Medical Center, North Shore University Hospital, Manhasset, NY, USA
| | - Stephen J. Lewis
- Department of Orthopaedics, University of Toronto, University Health Network, Toronto Western Hospital Toronto, ON, Canada
| | - Laurence D. Rhines
- Department of Neurosurgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S. Tim Yoon
- Department of Orthopaedics, Emory University, Atlanta, GA, USA
| | | | | | - Charles G. Fisher
- Division of Spine, Department of Orthopaedics, University of British Columbia,Vancouver General Hospital Vancouver, BC, Canada
| | - Dino Samartzis
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, IL, USA
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Hassan FM, Lenke LG, Berven SH, Kelly MP, Smith JS, Shaffrey CI, Dahl BT, de Kleuver M, Spruit M, Pellise F, Cheung KMC, Alanay A, Polly DW, Sembrano J, Matsuyama Y, Qiu Y, Lewis SJ. Independent Prognostic Factors Associated With Improved Patient-Reported Outcomes in the Prospective Evaluation of Elderly Deformity Surgery (PEEDS) Study. Global Spine J 2023:21925682231174182. [PMID: 37154697 DOI: 10.1177/21925682231174182] [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: 05/10/2023] Open
Abstract
STUDY DESIGN Prospective, multicenter, international, observational study. OBJECTIVE Identify independent prognostic factors associated with achieving the minimal clinically important difference (MCID) in patient reported outcome measures (PROMs) among adult spinal deformity (ASD) patients ≥60 years of age undergoing primary reconstructive surgery. METHODS Patients ≥60 years undergoing primary spinal deformity surgery having ≥5 levels fused were recruited for this study. Three approaches were used to assess MCID: (1) absolute change:0.5 point increase in the SRS-22r sub-total score/0.18 point increase in the EQ-5D index; (2) relative change: 15% increase in the SRS-22r sub-total/EQ-5D index; (3) relative change with a cut-off in the outcome at baseline: similar to the relative change with an imposed baseline score of ≤3.2/0.7 for the SRS-22r/EQ-5D, respectively. RESULTS 171 patients completed the SRS-22r and 170 patients completed the EQ-5D at baseline and at 2 years postoperative. Patients who reached MCID in the SRS-22r self-reported more pain and worse health at baseline in both approaches (1) and (2). Lower baseline PROMs ((1) - OR: .01 [.00-.12]; (2)- OR: .00 [.00-.07]) and number of severe adverse events (AEs) ((1) - OR: .48 [.28-.82]; (2)- OR: .39 [.23-.69]) were the only identified risk factors. Patients who reached MCID in the EQ-5D demonstrated similar characteristics regarding pain and health at baseline as the SRS-22r using approaches (1) and (2). Higher baseline ODI ((1) - OR: 1.05 [1.02-1.07]) and number of severe AEs (OR: .58 [.38-.89]) were identified as predictive variables. Patients who reached MCID in the SRS22r experienced worse health at baseline using approach (3). The number of AEs (OR: .44 [.25-.77]) and baseline PROMs (OR: .01 [.00-.22] were the only identified predictive factors. Patients who reached MCID in the EQ-5D experienced less AEs and a lower number of actions taken due to the occurrence of AEs using approach (3). The number of actions taken due to AEs (OR: .50 [.35-.73]) was found to be the only predictive variable factor. No surgical, clinical, or radiographic variables were identified as risk factors using either of the aforementioned approaches. CONCLUSION In this large multicenter prospective cohort of elderly patients undergoing primary reconstructive surgery for ASD, baseline health status, AEs, and severity of AEs were predictive of reaching MCID. No clinical, radiological, or surgical parameters were identified as factors that can be prognostic for reaching MCID.
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Affiliation(s)
- Fthimnir M Hassan
- Department of Orthopaedic Surgery, The Och Spine Hospital/Columbia University Irving Medical Center, New York, NY, USA
| | - Lawrence G Lenke
- Department of Orthopaedic Surgery, The Och Spine Hospital/Columbia University Irving Medical Center, New York, NY, USA
| | - Sigurd H Berven
- Department of Orthopaedic Surgery, University of California San Francisco, San Francisco, CA, USA
| | - Michael P Kelly
- Department of Orthopaedic Surgery, Rady Children's Hospital, San Diego, CA, USA
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia Medical Center, Charlottesville, VA, USA
| | | | - Benny T Dahl
- Department of Orthopaedic Surgery, Texas Children's Hospital, Bellaire, TX, USA
| | - Marinus de Kleuver
- Department of Orthopedics, Radboud University Medical Center, The Netherlands
| | - Maarten Spruit
- Department of Orthopedics, Sint Maartenskliniek, The Netherlands
| | - Ferran Pellise
- Department of Orthopaedic Surgery, Vall D'Hebron University Hospital, Spain
| | - Kenneth M C Cheung
- Department of Orthopaedic Surgery, Hong Kong University Schenzhen Hospital, Hong Kong, China
| | - Ahmet Alanay
- Department of Orthopedics, Acıbadem Mehmet ali Aydınlar University School of Medicine, Turkey
| | - David W Polly
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Jonathan Sembrano
- Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, MN, USA
| | - Yukihiro Matsuyama
- Department of Orthopaedic Surgery, Hamatsu University School of Medicine, Hamatsu, Japan
| | - Yong Qiu
- Department of Spine Surgery, Drum Tower Hospital of Nanjing University Medical School, China
| | - Stephen J Lewis
- Department of Orthopaedic Surgery, University of Toronto, Toronto, Canada
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10
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Early Postural Stability Changes in Patients Undergoing Correction of Spinal Deformity: A Prospective, Controlled Pilot Study. Spine (Phila Pa 1976) 2023; 48:240-246. [PMID: 36692155 DOI: 10.1097/brs.0000000000004527] [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: 06/24/2022] [Accepted: 10/09/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND CONTEXT Adult spinal deformity (ASD) is a prevalent condition often requiring surgical intervention. Improved outcomes among ASD patients have been shown to correlate with postoperative spinopelvic parameters, yet little is currently known about the role of postural stability and balance assessment for ASD patients. PURPOSE Explore early changes in postural stability following ASD correction. STUDY DESIGN Prospective cohort study. PATIENT SAMPLE Sixteen adult patients who underwent four-level or greater posterolateral fusion to address global spinal malalignment and 14 healthy controls with no known spinal deformity nor surgery. OUTCOME MEASURES Postural stability parameters, spinopelvic parameters preoperatively and postoperatively. METHODS Force plate balance assessment was completed where participants and healthy controls were instructed to stand with their hands at their sides, standing still, with eyes open. Center of pressure (COP), center of gravity (COG), and cone of economy (COE) parameters were analyzed with paired and unpaired t tests with an alpha of 0.05. RESULTS Preoperatively, ASD patients demonstrated more COG (P=0.0244) and sagittal and coronal head (P<0.05) sway than healthy controls. Postoperatively, ASD patients exhibited less COP (P=0.0308), COG (P=0.0276) and head (P=0.0345) sway. Compared to healthy controls, ASD patients postoperatively exhibited similar postural stability, aside from COP and COG sway amplitudes (P<0.05), and coronal head sway (P=0.0309). Pelvic incidence-lumbar lordosis and sagittal vertical axis improved from 16.2° to 4.8° (P<0.01) and 82.2 to 22.5 mm (P<0.01), respectively. CONCLUSION We report a novel early improvement in postural stability, comparable to healthy controls, following ASD correction that may be related to improved spinopelvic alignment. Force plate evaluation may be a useful tool for ASD patients postoperatively. Future clinical trials assessing the impact of postural stability on clinical and radiographic outcomes are warranted.
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11
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Gomez-Rice A, Capdevila-Bayo M, Núñez-Pereira S, Haddad S, Vila-Casademunt A, Pérez-Grueso F, Kleinstück F, Obeid I, Alanay A, Pellise F, Pizones J. A 5-year follow-up of the effect of corrective surgery in young adults with idiopathic scoliosis. Spine Deform 2023; 11:605-615. [PMID: 36607558 DOI: 10.1007/s43390-023-00642-9] [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: 07/09/2022] [Accepted: 12/31/2022] [Indexed: 01/07/2023]
Abstract
PURPOSE The purpose of this study was to determine mid-long-term outcomes (5 years) following surgery for young adult idiopathic scoliosis (YAdIS). METHODS This is a retrospective review of a prospective, multicenter adult deformity database including patients operated on idiopathic scoliosis by a single posterior approach, age at surgery between 19 and 29 (considered young adults), and 5-year follow-up. Demographic, radiographic and PROMS were analyzed preoperatively, at 2 years and at final follow-up. RESULTS Forty-two patients were included. Mean preoperative major curve angle was 59.65 ± 18.94. Main coronal curve initial correction was 56.38%, with 6% loss at 5 years. From baseline to 5 years after surgery, there was improvement in all PROMs (P < 0.004)-especially self-image-, except NRS-leg pain. This improvement was present at 6 months for all PROMs except for functional outcomes (SRS-Function and ODI) in which the improvement took place between 6 months and 2 years. In the 2- to 5-year follow-up period, no significant changes were seen in any PROMs. The percentage of patients reaching MCID from baseline at 5 years was: 75% for SRS-image, 45% for SRS-pain, 47.5% for SRS-function, 51.3% for SRS-mental, 42.5% for SRS-total and 15.4% for ODI. Patients reaching PASS at 5 years were: 88.1% for SRS-image, 81% for SRS-pain, 92.9% for SRS-function, 57.1% for SRS-mental, 88.1% for SRS-total, 92.7% for ODI and 69% for NRS pain. 11 minor and 4 major complications were identified. CONCLUSION YAdIS surgery resulted in an early and significant improvement in PROMs, especially for self-image, significantly reaching MCID and PASS thresholds. These results were maintained during long-term (5-year) follow-up.
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Affiliation(s)
- Alejandro Gomez-Rice
- Hospital Universitario Ramón y Cajal, Carretera de Colmenar Viejo Km 9, 100, 28034, Madrid, Spain.
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12
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Zuckerman SL, Lai CS, Shen Y, Cerpa M, Lee NJ, Kerolus MG, Ha AS, Buchanan IA, Devin CJ, Lehman RA, Lenke LG. Do Adult Spinal Deformity Patients Undergoing Surgery Continue to Improve From 1-Year to 2-Years Postoperative? Global Spine J 2021; 13:1080-1088. [PMID: 34036834 DOI: 10.1177/21925682211019352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Evaluate clinical improvement as measured by patient-reported outcomes (PROs) during the 1 to 2-year interval. STUDY DESIGN Retrospective Cohort. METHODS A single-institution registry of ASD patients undergoing surgery was queried for patients with ≥6 level fusions. Demographics and radiographic variables were collected. PROs collected were the ODI and SRS-22r scores at: preoperative, 1-year and 2-years. Outcome measures of clinical improvement during the 1-2 year time interval were: 1) group medians, 2) percent minimum clinically important difference (MCID), and 3) percent minimal symptom scale (MSS)(ODI < 20 or SRS-pain + function >8). Wilcoxon rank-sum tests, chi-squared tests, Kruskal-Wallis tests, and logistic regression were performed. RESULTS 157 patients undergoing ASD surgery with minimum of 1-year follow-up were included. Mean age was 53.2 and mean instrumented levels was 13.1. Preoperative alignment was: Neutral Alignment (NA) 49%, Coronal Malalignment (CM) 17%, Sagittal Malalignment (SM 17%), and Combined Coronal/Sagittal Malalignment (CCSM) 18%. Preoperative to 1-year, and preoperative to 2-years, all ODI/SRS-22r significantly improved (P < .001). In all patients, the only significant improvement in PROs between 1-and 2-year postoperative were those reaching ODI MCID (69% 1-year vs. 84% 2-years; P < .001). Subgroup analysis: ≥55 years had an improved median ODI (18 vs. 8; P = .047) and an improved percent achieving ODI MCID (73% vs. 84%, P = .048). CCSM patients experienced significant improvement in SRS-appearance score (75% vs. 100%; P = .050), along with those with severe preoperative SM >7.5 cm (73% vs. 100%; P = .032). CONCLUSIONS Most ASD patients experience the majority of PRO improvement by 1-year postoperative. However, subsets of patients that may continue to improve up to 2-years postoperative include patients ≥55 years, combined coronal/sagittal malalignment, and those with severe sagittal malalignment ≥7.5 cm.
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Affiliation(s)
- Scott L Zuckerman
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA.,Department of Neurological Surgery, 12328Vanderbilt University Medical Center, Nashville, TN, USA
| | - Christopher S Lai
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Yong Shen
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Meghan Cerpa
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Nathan J Lee
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Mena G Kerolus
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Alex S Ha
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Ian A Buchanan
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Clinton J Devin
- Steamboat Orthopaedic and Spine Institute, Steamboat Springs, CO, USA
| | - Ronald A Lehman
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
| | - Lawrence G Lenke
- Department of Orthopaedic Surgery, 21611Columbia University Medical Center, The Och Spine Hospital at New York Presbyterian, New York, NY, USA
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