Body mass index, waist circumference, and cardiometabolic risk factors in young and middle-aged Chinese women

Aug 31, 2010Journal of Zhejiang University. Science. B

Body weight, waist size, and heart-related health risks in young and middle-aged Chinese women

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Abstract

The prevalence of overweight/obesity was 32.4% in middle-aged women compared to 12.0% in young women.

Abdominal obesity was found in 60.3% of middle-aged women, significantly higher than the 36.2% in young women.
Both body mass index (BMI) and waist circumference (WC) showed significant correlations with various cardiometabolic risk factors in both age groups.
After adjusting for age, BMI remained significantly associated with all measured cardiometabolic variables in both young and middle-aged women.
WC was significantly correlated with triglycerides, fasting blood glucose, insulin resistance, and high-density lipoprotein cholesterol in young women, and with triglycerides, insulin resistance, and high-density lipoprotein cholesterol in middle-aged women.
BMI was identified as a better predictor of cardiovascular disease and diabetes compared to WC in both age groups.

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OBJECTIVE: To assess the associations between body mass index (BMI), waist circumference (WC), and cardiometabolic risk factors in young and middle-aged Chinese women.

METHODS: A total of 3011 women (1938 young women, 1073 middle-aged women), who visited our health care center for a related health checkup, were eligible for study. BMI and WC were measured. The subjects were divided into normal and overweight/obesity groups based on BMI, and normal and abdominal obesity groups based on WC. Cardiometabolic variables included triglyceride (TG), high density lipoprotein cholesterol (HDL-C), fasting blood glucose (FBG), homeostasis model assessment of insulin resistance (HOMA-IR), and blood pressure (BP).

RESULTS: The prevalence of overweight/obesity was significantly higher in middle-aged women (32.4%) than in young women (12.0%). The prevalence of abdominal obesity was also higher in middle-aged women (60.3%) than in young women (36.2%). There were significant differences in the comparison of all related cardiometabolic variables between different BMI (or WC) categories in young and middle- aged women groups, respectively. After adjustment for age, partial correlation analysis indicated that both BMI and WC were correlated significantly with all related cardiometabolic variables. After adjustment for age and WC, although the correlation coefficient r' was attenuated, BMI was still correlated significantly with all related cardiometabolic variables in young and middle-aged women. After adjustment for age and BMI, partial correlation analysis showed that WC was correlated significantly with TG, FBG, HOMA-IR, and HDL-C in young women and significantly with TG, HOMA-IR, and HDL-C in middle-aged women.

CONCLUSIONS: The prevalence of overweight/obesity and abdominal obesity was high in Chinese young and middle-aged women. BMI was a better predictor of cardiovascular disease and diabetes than WC in young and middle-aged women, and moreover, measurement of both WC and BMI may be a better predictor of cardiovascular disease and diabetes mellitus than BMI or WC alone.

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Body mass index, waist circumference, and cardiometabolic risk factors in young and middle-aged Chinese women

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