The association between body roundness index and osteoporosis in older patients: a cross-sectional study based on a comprehensive geriatric assessment

This cross-sectional study identifies BRI as an independent anthropometric predictor of osteoporosis in older adults (age ≥ 60 years), characterized by a nonlinear J-shaped dose-response pattern. The observed break-point (BRI = 4.67) suggests a critical threshold for accelerated osteoporotic risk. The robustness of associations across heterogeneous subpopulations, persisting after comprehensive confounder adjustment, positions BRI as a novel and clinically relevant biomarker for osteoporosis risk stratification in geriatric populations.