RESUMO
Objective·To describe the current status and explore the associated factors of sedentary behaviors among children and adolescents residing in Chongqing area.Methods·By random stratified and cluster sampling,a total of 9 596 students aged from 6 to 18 years old in Chongqing urban districts together with their parents were enrolled through a questionnaire.Mann-Whitney U test and Kruskal-Wallis H test were used to compare the difference among groups,and the binary Logistic regression model was used to explore the factors that influenced the prevalence of average time of homework＞2 h/d and screen time＞2 h/d.Results·The average time of sedentary behaviors in school days was 2.82 h/d,and the rate of sedentary behaviors＞2 h/d was 74.1％.The rate of boys (75.3％) was significantly higher than that of girls (72.7％) (x2=8.333,P=0.000).Logistic regression analysis showed that junior and senior students were the common risk factors for both homework and screen time＞2 h/d;on the contrary,extracurricular sports never being occupied could be the common protective factors.In addition,being girls (OR=1.187,95％ CI 1.048-1.299) and parents' sedentary time＞2 h/d (OR=1.529,95％ CI 1.303-1.794) could be the risk factors for homework time＞2 h/d.Non-only child (OR=1.194,95％ CI 1.066-1.320),no family rules on screen time (OR=1.193,95％ CI 1.062-1.388),and having a TV set at home (OR=1.330,95％ CI 1.147-1.472) could be the risk factors for screen time＞2 h/d.Conclusion·The status quo of sedentary behaviors among students in Chongqing area is not quite well.School's policy on extracurricular sports and home screen environment may be the mainly modifiable influencing factors.