Yongjie Chen1, Yu Yang1, Huan Jiang2, Xuan Liang1, Yuan Wang1, Wenli Lu1. 1. Department of Epidemiology and Statistics, School of Public Health, Tianjin Medical University, Tianjin, China. 2. Humanities and Social Sciences College, Harbin Medical University, Harbin, Heilongjiang Province, China.
Abstract
OBJECTIVE: This study aimed to examine the associations of BMI and waist circumference with all-cause mortality in a general adult population from the China Health and Nutrition Survey. METHODS: Based on the World Health Organization recommendations, the general adult population was divided into underweight (BMI < 18.5 kg/m2 ), normal weight (18.5 kg/m2 ≤ BMI < 23.0 kg/m2 ), overweight (23 kg/m2 ≤ BMI < 27.5 kg/m2 ), and obesity (BMI ≥ 27.5 kg/m2 ), as well as abdominal obesity (waist circumference value ≥ 90 cm for males and ≥ 80 cm for females). RESULTS: Overweight was associated with lower all-cause mortality in the 18- to 29-year-old and 30- to 39-year-old subgroups in males (P = 0.0490 and 0.0234; hazard ratio: 0.136 and 0.462, respectively), and underweight had the opposite association in the 50- to 59-year-old and ≥ 60-year-old subgroups in males (P = 0.0074 and 0.0398, respectively) and in all subgroups in females except the 30- to 39-year-old and 50- to 59-year-old groups (P = 0.0786 and 0.0538, respectively). Abdominal obesity was associated with lower all-cause mortality in ≥ 60-year-old females (P = 0.0071). CONCLUSIONS: Overweight was associated with lower all-cause mortality in young males and middle-aged females, but underweight demonstrated the opposite association in all elderly participants. Abdominal obesity could decrease all-cause mortality in elderly females.
OBJECTIVE: This study aimed to examine the associations of BMI and waist circumference with all-cause mortality in a general adult population from the China Health and Nutrition Survey. METHODS: Based on the World Health Organization recommendations, the general adult population was divided into underweight (BMI < 18.5 kg/m2 ), normal weight (18.5 kg/m2 ≤ BMI < 23.0 kg/m2 ), overweight (23 kg/m2 ≤ BMI < 27.5 kg/m2 ), and obesity (BMI ≥ 27.5 kg/m2 ), as well as abdominal obesity (waist circumference value ≥ 90 cm for males and ≥ 80 cm for females). RESULTS: Overweight was associated with lower all-cause mortality in the 18- to 29-year-old and 30- to 39-year-old subgroups in males (P = 0.0490 and 0.0234; hazard ratio: 0.136 and 0.462, respectively), and underweight had the opposite association in the 50- to 59-year-old and ≥ 60-year-old subgroups in males (P = 0.0074 and 0.0398, respectively) and in all subgroups in females except the 30- to 39-year-old and 50- to 59-year-old groups (P = 0.0786 and 0.0538, respectively). Abdominal obesity was associated with lower all-cause mortality in ≥ 60-year-old females (P = 0.0071). CONCLUSIONS: Overweight was associated with lower all-cause mortality in young males and middle-aged females, but underweight demonstrated the opposite association in all elderly participants. Abdominal obesity could decrease all-cause mortality in elderly females.