关键词: 超重肥胖, 睡眠时间, 学龄儿童

Abstract: Objective To investigate the influencing factors of night sleep time and its relationship with overweight and obesity in children, so as to provide scientific reference for taking interventions of overweight and obesity. Methods A total of 1 175 students from 8 schools(4 primary schools in urban and rural areas, respectively) in Fangshan District, Beijing, were recruited by a stratified cluster random sampling method in October 2012. The distribution characteristics of sleep time and its relationship with overweight and obesity were analyzed by using multivariate binary Logistic regression model. Results The sleep insufficiency rate of school-age children(<10 h/d) reached 68.5%. Demographic characteristics affected the sleep time of children, and urban students and boys had less sleep time (P<0.001).Body mass index(BMI) and the rates of obesity and overweight increased with the decreasing of sleep duration (P<0.01).The average daily sleep duration <9 h/d was a risk factor for overweight and obesity of school-age children. After the adjustment of gender, residence, family income, parents′ educational level, physical activity and sedentary behavior time, only the average daily sleep duration <9 h/d on weekends was associated with overweight and obesity of school-age children[OR=1.570 (1.074-2.295),P=0.02]. Conclusions Sleep insufficiency may be a risk factor for overweight and obesity in children, especially the average daily sleep duration of weekends. The prevalence of overweight and obesity should be prevented and controlled through targeted improvement of children′s sleep duration and lifestyle.

Key words: overweight and obesity, sleep duration, school-age children