Abstract
BACKGROUND CONTEXT Previous research has demonstrated short term benefit in radiographic and clinical outcomes using minimally invasive (cMIS) and Hybrid techniques to correct adult spinal deformity (ASD). However, it is not known if these benefits are maintained over longer periods of time. PURPOSE Evaluate the durability of radiologic and clinical outcomes in cMIS and Hybrid correction of ASD. STUDY DESIGN/SETTING Multicenter retrospective review of ASD database PATIENT SAMPLE A total of 197 (99%) patients were evaluated at 2 years and 96 (49%) patients had 3 year data available. Inclusion criteria were age ≥18 years, and one of the following: coronal cobb>20°, SVA>5cm, PT>20°, PI-LL >10°. OUTCOME MEASURES Adjusting for age and preoperative Cobb angle, radiographic, clinical outcomes and complications were assessed at 2 and 3 years postoperatively. METHODS A retrospective data base was analyzed using paired t-test and Mann-Whitney U analysis for continuous variables and Chi-Square analysis for categorical variables RESULTS A total of 197 (99%) patients were evaluated at 2 years and 96 (49%) patients had 3-year data available. When analyzing the latest data available, cMIS corrected the Cobb angle greater than Hybrid technique (18.3 vs 15.2, p CONCLUSIONS In this retrospective review of a large database of patients undergoing minimally invasive and Hybrid surgery for ASD, both techniques significantly improved radiographic parameters, and this was maintained through 2 and 3 years. When controlling for age and pre-operative Cobb angle, cMIS improved Cobb angle slightly more than Hybrid technique. Although back pain and ODI were significantly more improved using cMIS technique at 2 years, this difference was no longer significant by 3 years. Complications were significantly less frequent using cMIS than Hybrid technique. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.
Published Version
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