青少年睡眠时间静态活动与超重肥胖的关系

目的 探讨中小学生睡眠时间、静态活动与超重肥胖的关系,为制定预防和干预青少年肥胖策略提供依据.方法 采用自行编制的“学生营养状况及饮食行为调查表”,对多阶段分层整群抽取的湖北省3 182名城乡中小学生进行睡眠时间、静态活动调查,并在现场测量身高、体重等指标,分析睡眠时间与静态活动对超重肥胖的影响.结果 中小学生超重肥胖检出率为11.7％,其中男生为14.8％,女生为8.5％,男生超重肥胖检出率显著高于女生(x2=30.49,P＜0.05)；小学生超重检出率显著高于中学生(x2=72.40,P＜o.05).调查前的过去7d里,小学生睡眠不足1 003例,占98.9％；中学生睡眠不足1 659例,占76.5％,差异有统计学意义(x2=253.40,P＜0.05).小学生各项静态活动平均每天≥2 h的分别为看电视(13.6％)、上网(33.7％),中学生分别为看电视(13.5％)、上网(23.5％),中、小学生之间差异均有统计学意义(P值均＜0.05).睡眠不足、看电视和上网时间均≥2 h的学生超重肥胖率分别为12.3％,13.0％和15.8％.Logistic回归分析显示,上网时间长(≥2 h)的学生发生超重肥胖的危险性是上网时间短(＜2 h)学生的1.393倍(P＜0.05).结论 长时间上网为中小学生超重肥胖的独立危险因素.

Relationship of sleep duration and sedentary behavior with overweight and obesity in adolescents

Objective To explore the relation of sleep duration and sedentary behavior with overweight and obesity in adolescents for developing prevention and intervention strategies for adolescent obesity.Methods A cross-sectional study on sleep duration and sedentary behavior was conducted by self-designed questionnaire in 3 182 adolescents from primary and middle school students in four regions in Hubei Province.Weight and height were measured to analyze the impact of sedentary behavior to overweight and obesity.Results The total prevalence of overweight and obesity was 11.7%,of which,14.8% were boys and 8.5% were girls,the difference of prevalence between boys and girls was statistically significant(χ2=30.49,P<0.05).There was significant difference on the prevalence of overweight and obesity in primary school students(χ2=72.40,P<0.05).The proportion of insufficient sleep in primary school students(98.9%) was significantly higher than that in middle school students(76.5%)(χ2=253.40,P<0.05).The incidence of average television-viewing time≥2 h and online time≥2 h were 13.5% and 23.5% in middle school students,13.6% and 33.7% in primary school students,respectively,they were all statistically different in different age groups.The prevalence of overweight and obesity among those students of insufficient sleep,television-viewing time≥2 h and online time≥2 h was 12.3%,13.0% and 15.8%,respectively.Logistic regression analysis revealed the risks of overweight and obesity prevalence of students who spent more time on Internet(≥2 h) was 1.393 times more than the ones who spent less time on Internet(<2 h).Conclusion Get online for long is an independent risk factor of overweight and obesity among adolescents.