Objective:To explore risk factors on two weeks prevalence of chongqing city residents over 15

then to provide evidence for government decision-making and methodologic reference for similar research.Methods:Basing on western expending data of the fourth national health service survey in chongqing

risk factors of city residents’two weeks prevalence were sreened by desciptive analysis and bi-level logistic regression model.Results:Hierarchical structure was found in two weeks prevalence of chongqing city residents

and difference exist among different street.Age

marriage

education

medical insurance and ecomonic condition were risk factors of the study subjects.Conclusion:Street enviorment’s effect to resident’s two weeks prevalence should not be ignored.Analysizing resident’s health service survey data by cluster sampling with multilevel model

more information can be gained.