学龄儿童睡眠时间与超重肥胖的相关性

Associations of sleep duration with overweight and obesity in school-age children

目的探究夜间睡眠时间的影响因素及其与儿童超重肥胖的关系,为学龄儿童超重肥胖干预措施及政策的制定提供科学依据。方法采用分层整群抽样方法,在北京市房山区城市和乡村各抽取4所小学,2012年10月对抽中学校的1175名小学生进行调查,通过多因素Logistic回归模型分析睡眠时间分布特征及其与超重肥胖的关系。结果学龄儿童睡眠不足(<10 h/d)率达68.5%,不同人口学特征影响儿童睡眠时间,城市学生、男生睡眠时间较少(P<0.001)。儿童体重指数(BMI)和超重肥胖率随睡眠时间的减少而增加(P<0.01)。日均睡眠时间<9 h/d组是学龄儿童超重肥胖的危险因素,调整性别、城乡、家庭收入、父母文化程度、体力活动和静态行为时间后,仅有周末日均睡眠时间<9 h/d组(OR=1.570,95%CI:1.074~2.295,P=0.02)与学龄儿童肥胖超重风险相关。结论睡眠不足可能是导致儿童超重肥胖的危险因素,尤其周末日均睡眠时间可能影响更大,应通过有针对性地改善儿童的睡眠时间和生活方式以预防和控制超重肥胖的流行。

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 1175 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.