摘要
Objective This study aims to explore trends in sedentary behavior among Chinese children aged 6–17 years per demographic and social characteristics.Methods A total of 4,341 children aged 6–17 years who participated in the China Health and Nutrition Survey from 2004 to 2015 were included.Repeated measures from mixed-effects models were applied to test trends in sedentary behaviors,which were further analyzed after applying stratification according to gender,age,urbanization level,residential area,and region.Random-effects ordinal regression models were used to examine the trends at sedentary levels.Results From 2004 to 2015,sedentary time among children aged 6–17 years increased from 23.9±0.6 h/week to 25.7±0.6 h/week(P<0.001).Increases of 3.1 h/week(P<0.001),2.3 h/week(P=0.012),and 1.3 h/week(P=0.042)were found among the low-,medium-,and high-urbanization groups respectively and increased by 2.0 h/week(P<0.001)and 1.3 h/week(P=0.002)among rural and urban children,respectively.The proportion of Chinese children with average daily screen time below 2 hours declined by 10.2%(OR=0.51,95%CI:0.42–0.63,P<0.001);a decreasing trend was observed in both boys and girls.Conclusions Sedentary time among Chinese children aged 6–17 years showed an upward trend from 2004 to 2015,especially among children residing in rural areas and regions with low urbanization levels.
基金
the National Scientific and Technological Basic Resources Investigation Program Research and application of nutrition and health system for children aged 0-18 years in Chinaw[2017FY101100].
