Study on the Relationship between Prevalence of Diabetes and Body Mass Index and Waist Circumference in Da Yao County of Yunnan Province

［Abstract］Objective　To analyze the relationship between prevalence of diabetes and body mass index （BMI） and waist circumference（WC）in rural Yunnan Province. Methods　Multistage stratified random sampling method was used to select representative sample of 2 479 rural residents aged 35 years and over from Da Yao County. Each participant received questionnaire interview and physical examination. Results The overall prevalence of diabetes was 6.1%，and was 7.1% for males，5.1% for females in the study region. Males had higher prevalence of diabetes than females（P＜0.05）. Prevalence of diabetes increased with age，whereas decreased when income rising（P＜0.01）. Prevalence rates of low body weight and central obesity were higher in women than in men （P＜0.01），and decreased with income（P＜0.01）. The risk of diabetes increased with BMI and WC（P＜0.01）.Obese and central obese people had 2.285 and 2.98 times higher risk of being diabetic than their counterparts. Conclusion It is necessary to take measures to reduce prevalence of both obesity and central obesity，so as to decrease the occurrence of diabetes.