Abstract
Purpose
Predictors of marked improvement versus failure to improve following surgery for adult scoliosis have not been identified. Our objective was to identify factors that distinguish between patients with the best and worst outcomes following surgery for adult scoliosis.
Methods
This is a secondary analysis of a prospective, multicenter spinal deformity database. Inclusion criteria included: age 18–85, scoliosis (Cobb ≥ 30°), and 2-year follow-up. Based on the Oswestry Disability Index (ODI) and the SRS-22 at 2-year follow-up, patients with the best and worst outcomes were identified for younger (18–45) and older (46–85) adults with scoliosis. Clinical and radiographic factors were compared between patients with the best and worst outcomes.
Results
276 patients met inclusion criteria (89 younger and 187 older patients). Among younger patients, predictors of poor outcome included: depression/anxiety, smoking, narcotic medication use, older age, greater body mass index (BMI) and greater severity of pain prior to surgery. Among older patients, predictors of poor outcome included: depression/anxiety, narcotic medication use, greater BMI and greater severity of pain prior to surgery. None of the other baseline or peri-operative factors assessed distinguished the best and worst outcomes for younger or older patients, including severity of deformity, operative parameters, or the occurrence of complications.
Conclusions
Not all patients achieve favorable outcomes following surgery for adult scoliosis. Baseline and peri-operative factors distinguishing between patients with the best and worst outcomes were predominantly patient factors, including BMI, depression/anxiety, smoking, and pain severity; not comorbidities, severity of deformity, operative parameters, or complications.
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Acknowledgments
Funding for the Spinal Deformity Study Group provided by Medtronic.
Conflict of interest
The present study was performed through the Spinal Deformity Study Group, which received funding from Medtronic. Dr. Smith is a consultant for Medtronic, DePuy, and Biomet; has received honoraria for teaching from Medtronic, DePuy, Biomet, and Globus; and has received research study group support from Medtronic and DePuy. Dr. Shaffrey is a consultant for Biomet; receives royalties from Medtronic and Biomet; has received honoraria from DePuy; has received research support from NIH, US Department of Defense, AO, and NACTN; and has received fellowship support from AO. Dr. Glassman is a consultant for Medtronic; has received royalties from Medtronic; has received research funding from Medtronic and Norton Healthcare; is an employee of Norton Healthcare; and has received travel expenses from Stryker. Dr. Schwab is a shareholder in Nemaris, Inc; is a consultant for DePuy; is a consultant for Medtronic; has received research grant support from DePuy; and has received research grant support from Medtronic. Dr. Lafage is a shareholder in Nemaris, Inc. Dr. Bridwell is a consultant for DePuy.
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Smith, J.S., Shaffrey, C.I., Glassman, S.D. et al. Clinical and radiographic parameters that distinguish between the best and worst outcomes of scoliosis surgery for adults. Eur Spine J 22, 402–410 (2013). https://doi.org/10.1007/s00586-012-2547-x
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DOI: https://doi.org/10.1007/s00586-012-2547-x