Inverse association between body mass index and all-cause mortality in rural chinese adults: 15-year follow-up of the Anqing cohort study.

Objective: To investigate the association between body mass index (BMI) and all-cause mortality in a Chinese rural population.

Design: Prospective cohort study.

Setting: This study was conducted from 2003 to 2018 in Anqing, Anhui Province, China.