Spino‐Pelvic Alignment and Surgical Outcomes in Chinese Elderly With Lumbar Stenosis Syndrome: A Prospective Study

Objective This study aimed to systematically identify and quantify the acceptable spino‐pelvic parameters for Chinese elderly patients with lumbar stenosis syndrome (LSS) following surgical treatment. Method A prospective study of 165 LSS cases from July 2018 to June 2020 evaluated spino‐pelvic alignment using PI, LL, PT, and SVA, categorized by SRS‐Schwab classification. Quality of life was assessed via the Oswestry disability index (ODI), and parameter thresholds were determined by AICc and ROC analysis. Results No significant change in radiological parameters was observed postsurgery. However, clinical outcomes improved with lower grades of PI‐LL and PT. The mean threshold for PI‐LL and PT at baseline was 18.8° and 26.1°, respectively. At the endpoint, PI‐LL was 17.7°, and PT was 26.1°, indicating optimal ranges for surgery. Conclusion Spino‐pelvic alignment significantly correlates with quality of life in elderly LSS patients. The study suggests that PI‐LL and PT should be maintained within 17.7° and 26.1°, respectively, for optimal surgical outcomes.