【摘要】 目的分析安徽省中小学生睡眠时间随年龄变化特征,为探讨中小学生睡眠时间与体质量指数(BMI)的关联提供基础数据。方法以安徽省2014年全国学生体质与健康调研的7 974名中小学生为研究对象,测量身高和体重,计算体质量指数。问卷调查获得睡眠状况。采用多因素线性回归分析睡眠时间与BMI-Z分(Z-BMI)的关联性。结果中小学生睡眠时间随年龄的增加而减少。9~11岁、12~14岁、15~18岁学生中每天睡眠时间超过8 h的比例分别为73%,34.6%,3.3%。9~11岁、12~14岁、15~18岁学生中睡眠时间符合国家卫生标准的比例分别为3.3%,8.4%,3.3%,各年龄组睡眠时间充足率女生均低于男生,差异均有统计学意义(χ2值分别为5.218,3.876,22.702,P值均<0.05)。15~18岁组男女生睡眠时间与Z-BMI呈负关联(β=-0.070,P<0.05),且两者关联在男生中存在剂量反应关系。12~14岁组女生,随睡眠时间增加Z-BMI降低(β=0.073,P<0.05);分组分析显示,与睡眠时间小于7 h组相比,睡眠≥8 h组Z-BMI降低(β=-0.229,P<0.05)。结论睡眠时间不足在安徽省中小学生中十分普遍,睡眠时间不足可能增加Z-BMI增高的风险。更多还原

【Abstract】 Objective To investigate sleep duration pattern with age and its relation with BMI Z scores in primary and middle school students in Anhui Province. Methods This study was based on data from 2014 Report on Chinese Students Physical Health. Data from 7 974 children and adolescents aged 9-18 years were included. Height and weight were measured. Body mass index( BMI) was calculated. Information on sleep duration was occurred with self-reported questionnaire. Sleep duration and BMI-Z scores after adjustment for potential confounding variables with multiple linear regressions. Results Sleep duration decrease with the increase of age. The proportion of students aged 9-11 years, 12-14 years and 15-18 years with sleep duration more than eight hours per day were 73%, 34.6% and 3.3%, respectively. The proportion of students aged 9- 11 years, 12- 14 years and 15- 18 years with sleep duration met the national guideline were 3.3%, 8.4% and 3.3%, respectively. Sleep duration in girls is higher than boys in all groups. The differences were statistically significant( P<0.05). Compared with 2010 results in Anhui Province, sleep duration among primary and middle school students is decreasing( P<0.05).There is negative association between sleep duration and BMI-Z scores in students aged 15-18 years, with a dose-response relation in boys. Girls between 12 and 14 years old had lower Z-BMI with longer sleep duration. Hierarchical analysis indicated that compared with students sleeping less than 7 hours, students sleeping more than 8 hours had a lower Z-BMI. Conclusion Insufficient sleep duration is common among children and adolescents in Anhui Province, which increases the risk of overweight and obesity.更多还原