A Study On Prevalence Rate And Risk Factors Of Overweight, Obesity And Abdominal Obesity

Objective:To investigate the prevalence rates, epidemic characters and risk factors of overweight, obesity and abdominal obesity, and to explore the relations of them with hypertension and type2diabetes.Methods:A cross-sectional study was conducted in Tianjin from June to July in2005. The multi-phasic stratified cluster sampling method was adapted.7567sujects aged≥20years and having lived in Tianjin over5years were selected as survey sample. Information was collected through face-to-face interview, physical examination and laboratory test. The overweight and obesity were diagnosed according to the diagnostic criteria of the Prevention and Control Guide of Overweight and Obesity in Chinese adult. Univariate and multivariate logistic regression were used to analyse odds ratio (OR) and its95percent of confidence interval (95%CI) of overweight,, obesity and abdominal obesity in relation to related factors after adjusting for other potential confounders.Results:Of7567subjects,2783were overweight.1010were obesity, and3475were abdominal obesity, the prevalence of overweight, obesity and abdominal obesity were36.8%,13.3%and45.9%respectively. The results of multivariate logistic regression analysis showed that the risk factors for overweight are age (OR=1.117,95%CI:1.076-1.160), family history of diabetes (OR=1.605,95%CI:1.240-2.079), while female (OR=0.733,95%CI:0.696-0.860) decreased prevalence of overweight; and age (OR=1.114,95%CI:1.057-1.175), family history of diabetes (OR=1.682,95%CI:1.195～2.365), staple food intake (OR=1.132,95%CI:1.043-1.228). vegetable intake (OR=1.080,95%CI:1.005-1.160), irregular breakfast (OR=1.365,95%CI:1.038-1.793) increased the prevalence of obesity; age (OR=1.185,95%CI:1.142-1.230), alcohol drinking (OR=1.251,95%CI:1.102-1.419). vegetable intake (OR=1.103,95%CI:1.053-1.156). family history of diabetes (OR=2.178.95%CI:1.684-1.816). irregular breakfast (OR=1.408.95%CI:1.152-1.722) and history of stress events (OR=1.506,95%CI:1.171-1.936) were risk factors for abdominal obesity, while female (OR=0.422.95%CI:0.374-0.476) and no-manual labor were the protective factor for it. However, no association was found between physical exercise and overweight, obesity and abdominal obesity. Furthermore, the results of logistic regression analyses showed that the ORs (95%CIs) of hypertension in relation to overweight, obesity and abdominal obesity were1.484(1.275-1.726),1.825(1.502-2.217) and3.008(2.617-3.458) respectively, and those of type2diabetes were1.797(1.498-2.155),2.887(2.325-3.585) and4.409(3.667-5.300).Conclusions:The prevalence of overweight, obesity and abdominal obesity were36.8%,13.3%and45.9%respectively. Overweight, obesity and abdominal obesity have similare risk factors. Age, gender and family history of diabetes may relate to overweight; age, family history of diabetes, staple food intake and irregular breakfast and smoking may relate to obesity; age, gender, no-manual labor, alcohol drinking, family history of diabetes, vegetable intake, irregular breakfast, and history of stress events may relate to abdominal obesity. But no relations were found between physical exercise and overweight, obesity or abdominal obesity. Overweight, obesity and abdominal obesity were relation to hypertension and type2diabetes.