Abstract: Objective To investigate the influence factors of body mass index (BMI) in elderly in Shanghai Dapuqiao community, thus providing a basis for further management and treatment of chronic diseases and health education in this regard.Methods Physical examination data were analyzed on a series of 2,106 elderly people over 65 by means of multiple stepwise regression in relation to relative factors influencing IBM in the elderly.MethodsAmong the 2,106 elderly people,624 had various physical indicators normal and no previous history of chronic diseases, accounting for 29.6%.As to the anomaly detection rates,the top five were in triglyceride(TG)(65.8%),waistline(63.9%),BMI(60.3%),blood pressure(BP)(52.5%),and total cholesterol(TC)(31.7%).Women were found to be higher than men in values of BMI,TC,TG,HDL-C,LDL-C,SBP.But men were higher than women in values of wasitline,UA and DBP.The positive detection results in different age groups were different with TG,LDL-C,UA.Through multiple stepwise regression analysis,BMI was found to be in positive correlation with sex,wasitline,TC,LDL-C,UA,and in negative correlation with age and HDL-C.Conclusion Hyperlipidemia, high blood pressure,overweight or obese were higher in detection rate among the elderly in Dapuqiao community. BMI was in relation with waistline, sex, blood lipid, age and UA. To investigate the basic health status of elderly people over 65 is important, which is of benefit to preventing and treating chronic disease in the community.