Objective To know about the status of obesity in 20-45 years old persons in Shanghai and find the different behaviors and practice related overweight and obesity among the characteristic persons.Methods A systematic random sampling method was applied to select 1000 adults in 18 districts in Shanghai.This survey was a transverse section survey. The survey was done by tospective questionnaire by telephone, Door-to-door and Intercept Interview, while the height, weight, diet pattern and nutrition struc...