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Article Abstract
Background: A critical aspect of adult spinal deformity (ASD) surgery is selection of the upper instrumented vertebra (UIV) in the lower thoracic (LT) or upper thoracic (UT) spine. This study compares reoperation rates among patients fused to the UT and LT spine.
Methods: A retrospective analysis was conducted using PearlDiver, a national insurance claims database. ASD patients who underwent thoracolumbar fusion with pelvic fixation spanning at least 7 segments were included. The primary outcome was reoperation rates at 1-, 2-, and 5-years. Demographic and clinical data were analyzed using logistic regression and Kaplan-Meier survival analysis.
Results: 7,300 patients were included, 6,124 undergoing 7-12 segments of instrumentation and 1,176 undergoing 13 + segments. Unmatched analysis revealed significantly greater osteoporosis (18.8 % vs 13.3 %, p < 0.001) and osteopenia (27.0 % vs 20.9 %, p < 0.001) in the 13 + segment group. Curve morphology significantly differed on unmatched analysis, with the 13+ segment group demonstrating greater rates of scoliosis, kyphosis, and sagittal plane deformity. 1,028 patients were included in a 1:1 matched analysis. Overall reoperation rate in matched cohorts were 25.9 % and 25.5 % for 7-12 segments and 13+ segments, respectively. No significant difference was found in reoperation rates at 1-, 2-, and 5- years in unmatched and matched cohorts. Kaplan-Meier analysis revealed similar reoperation-free probabilities between both cohorts.
Conclusion: This study found no significant difference in reoperation rates between patients with 7-12 and 13+ segments of spinal instrumentation. Kaplan-Meier survival analysis supports these findings. Further research is needed to explore other factors and surgical techniques contributing to reoperation rates and long-term outcomes.
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| http://dx.doi.org/10.1016/j.jocn.2025.111391 | DOI Listing |
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