METHODS:
A cross-sectional analysis was conducted using data from a baseline survey from an on-going cohort study of 61 500 men between 40 - 74 of age in urban Shanghai. Study subjects were recruited from 8 communities of an urban district in Shanghai during 2002 to 2006. General obesity was measured by body mass index (BMI >/= 28) and, central obesity by waist to hip ratio (WHR >/= 0.9). Unconditional logistic regression model was used to estimate the odds ratio and 95% confidence interval of chronic diseases associated with obesity after adjustment for potential confounding factors