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      A follow-up study on the correlation between sleep duration and body mass index in primary and middle school students in Zhejiang Province from 2017 to 2019


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          Objective To understand sleep behavior among primary and middle school students and its impact on overweight and obesity changes, to provide evidence for developing obesity prevention and controlling strategies in children and adolescents.

          Methods Primary and middle school students from three cities in Zhejiang Province who participated in questionnaire surveys and physical measurements in both 2017 and 2019 were selected. A follow-up dataset of 605 students was developed and the relationship between sleep duration and body mass index was analyzed.

          Results From 2017 to 2019, BMI- Z scores for male and female participants increased by 0.24 and 0.13, respectively. BMI- Z scores increased by 0.29 in students of 9-12 years old and increased by 0.11 and 0.25 in urban and rural students, respectively ( P<0.05). The prevalence of insufficient sleep duration increased from 37.0% to 41.8% simultaneously (χ 2 = 3.68, P =0.06). After adjusting for confounding factors, the BMI- Z score of students with insufficient sleep was 0.20 higher than those with sufficient sleep duration ( P<0.01). Compared with participants who had sufficient sleep duration from 2017 to 2019, participants whose sleep duration changed from sufficient to insufficient, and those who always had insufficient sleep duration increased by 0.23, respectively ( P<0.05).

          Conclusion Insufficient sleep duration is a risk factor for obesity. Shortened sleep duration is related to weight gain, and maintaining sufficient sleep duration may reduce the risk of obesity in children and adolescents.


          【摘要】 目的 了解睡眠行为及其变化对中小学生体重变化的影响, 为制定儿童青少年肥胖防控策略提供理论依据。 方法 选取来自“全国学生常见病和健康影响因素监测”浙江省 3 座城市中同时参与 2017 和 2019 年问卷调査和体格测量的 中小学生, 形成 605 人的追踪调査数据, 分析睡眠时长与体质量指数 (BMI) 的关联。 结果 2017—2019 年, 男、女生 BMI Z 评分分别升髙了 0.24 和 0.13, 9~12 岁学生的 BMI Z 评分升髙了 0.29, 城市和乡村学生 BMI Z 评分分别升髙了 0.11 和 0.25 ( P 值均<0.05); 同期睡眠不足总体检出率由 37.0% 增加到 41.8% (χ 2 = 3.68, P =0.06)。在调整混杂因素后, 睡眠不足学生 的 BMI Z 评分较睡眠充足学生髙 0.20 ( P<0.01); 与睡眠始终充足的学生相比, 2017—2019 年睡眠时长由充足变为不足、睡 眠始终不足的学生 BMI Z 评分均增加了 0.23 ( P 值均<0.05)。 结论 睡眠不足是肥胖的危险因素, 睡眠时长缩短的学生体 重增长明显, 增加睡眠时长可能降低学生远期肥胖风险。

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          Author and article information

          Chinese Journal of School Health
          Chinese Journal of School Health (China )
          01 June 2022
          01 June 2022
          : 43
          : 6
          : 847-850
          [1] 1School of Public Health, Peking University, Beijing (100191), China
          Author notes
          *Corresponding author: DONG Bin, E-mail: bindong@ 123456bjmu.edu.cn
          © 2022 Chinese Journal of School Health

          This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 Unported License (CC BY-NC 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See https://creativecommons.org/licenses/by-nc/4.0/.

          Self URI (journal-page): http://www.cjsh.org.cn
          Journal Article

          Ophthalmology & Optometry,Pediatrics,Nutrition & Dietetics,Clinical Psychology & Psychiatry,Public health
          Regression analysis,Sleep,Time,Students,Body mass index


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