Comparable 2-year functional outcomes following vertebroplasty for thoracic and lumbar osteoporotic vertebral compression fractures: a retrospective cohort study

Abstract

Study Design Retrospective cohort study. Purpose To compare short- and medium-term patient-reported outcome measures (PROMs) between thoracic and lumbar percutaneous vertebroplasty (PVP) cohorts for osteoporotic vertebral compression fractures (OVCFs). Overview of Literature PVP is well-established for pain relief in OVCF; however, whether clinical outcomes vary by the anatomical location of the treated vertebrae, remains unclear. Methods Ninety patients who underwent PVP between January 2010 and August 2022 with complete 2-year PROM follow-up were included and stratified into thoracic (n=33) and lumbar (n=57) cohorts. Outcomes included the Oswestry Disability Index (ODI), North American Spine Society (NASS) Neurogenic Symptom score, Visual Analog Scale (VAS) pain score, and Short Form-36 (SF-36) domains. Between-group comparisons were assessed using Wilcoxon rank-sum tests, and effect sizes were summarized using Cliff’s delta. Minimal clinically important difference (MCID) achievement was assessed for ODI, VAS Back Pain, and VAS Leg Pain. Multivariable linear regression examined the independent effect of vertebral region after adjustment for age, sex, race, number of vertebral levels treated, and baseline PROMs, with Benjamini-Hochberg false-discovery-rate (FDR) correction applied for multiple comparisons. Results The mean age was 76.4±8.5 years, and 83.3% of patients were female. No significant between-group differences were observed in ODI, NASS score, VAS pain score, or any SF-36 domain at 6 months or 2 years (p>0.05). MCID achievement rates for ODI and VAS Back Pain were high and comparable between groups at both follow-up points, exceeding 87%. On adjusted regression, the vertebral region was not an independent predictor of any postoperative PROM after FDR correction. Conclusions Thoracic and lumbar vertebroplasty yielded comparable 2-year PROMs with no statistically significant differences detected between cohorts. These findings suggest that the vertebral region may not be a major determinant of patient-reported recovery following vertebroplasty for OVCFs. However, residual confounding, attrition, and absent radiographic variables preclude definitive conclusions regarding clinical equivalence.