Body roundness index and its role in predicting COPD risk: insights from the English Longitudinal Study of Aging and the health and retirement study

This study demonstrates a significant association between the Body Roundness Index (BRI) and chronic obstructive pulmonary disease (COPD). The increase in BRI is significantly associated with both the incidence of COPD and newly diagnosed cases. Restricted cubic spline (RCS) analysis further reveals a "J-shaped" relationship between BRI and COPD, suggesting that BRI may serve as a potential predictive tool for COPD risk.