Analysis on prevalence of physical activity time ＜ 1 hour and related factors in students aged 9-22 years in China, 2014 / 中华流行病学杂志

ABSTRACT

Objective To explore the prevalence of physical activity time ＜1 hour and related factors in students aged 9-22 years in China.Methods A total of 220 159 students (110 039 boys and 110 120 girls) aged 9-22 years who completed the questionnaire of physical activity and lifestyle behaviors were selected from "2014 National Physical Fitness and Health Surveillance" for the current study.All the participants were divided into 2 groups,i.e.physical activity time ＜ 1 hour and physical activity time ≥ 1 hour according the suggestion of Central Government,stratified by age and gender.x2 tests were used to compare the difference in the prevalence of physical activity time ＜ 1 hour between boys and girls in every age groups.Univariate and multivariate log-binomial regression models were used to explore the factors that influenced the prevalence of physical activity time ＜ 1 hour.Results The boy's prevalence of physical activity time ＜1 hour was 73.3％,with the lowest (57.0％) in 9-years-old group,and highest (82.5％) in 18 years old group.The girl's prevalence of physical activity time ＜ 1 hour was 79.1％,with the lowest (60.1％) in 9-years-old group,and highest (89.8％) in 21 years old group.Overall,The prevalence of physical activity time ＜ 1 hour was significantly higher in girls than in boys (P＜0.001),and the prevalence were significantly higher in girls than in boys in all the age groups (P＜0.001),and it was observed that the prevalence of physical activity ＜ 1 hour increased with age in both boys and girls (P＜0.001).Multivariate log-binomial regression model found that being girl (PR=1.05,95％CI1.05-1.06),parents' disliking children to participate physical activity (PR=1.08,95％CI1.07-1.09),heavy homework (PR=1.13,95％CI1.12-1.14),long homework time (PR=1.08,95％CI1.07-1.08),long time spending on electronic screen watching (PR=1.01,95％CI1.00-1.01) and disliking physical class (PR=1.11,95％CI1.10-1.12) could be the risk factors for physical activity time ＜ 1 hour,however,living in rural area (PR=0.99,95％CI0.98-0.99) and no supporting from parents for children to participate physical activity (PR=0.99,95％CI1.98-1.00) could be the protective factors,but no consistent association with the time of TV watching was observed (P=0.226).Conclusions The prevalence of physical activity time ＜ 1 hour was high in students aged 9-22 years in China.Female,parents;disliking children to participate physical activity,heavy homework,long homework time,long electronic screen watching time and disliking physical class might be the risk factors.