Wang Lu, Jansen Wilma, Boere-Boonekamp Magda M, Vlasblom Eline, L'Hoir Monique P, Beltman Maaike, van Grieken Amy, Raat Hein
Department of Public Health, Erasmus University Medical Center, Rotterdam, The Netherlands.
Department of youth and education, City of Rotterdam, Rotterdam, The Netherlands.
Pediatr Obes. 2019 Jun;14(6):e12506. doi: 10.1111/ijpo.12506. Epub 2019 Jan 18.
Relatively, few longitudinal studies have evaluated the association between sleep and body mass index (BMI) among younger children. In addition, few studies have evaluated the bidirectional longitudinal association between sleep duration and child BMI.
The objective of the study is to determine in children aged 6 to 36 months (1) the cross-sectional association of sleep duration and sleep problems with child BMI z score, (2) whether sleep duration predicts changes in child BMI z score, and (3) and whether BMI z score can predict changes in child sleep duration.
This study used longitudinal data from the BeeBOFT study (N = 2308). Child sleep duration and sleep problems (indicated by night awakenings and sleep-onset latency) were parent reported, and child BMI was measured using a standardized protocol by trained healthcare professionals at approximately 6, 14, and 36 months of age. Linear mixed models and linear regression models were applied to assess the cross-sectional and bidirectional longitudinal associations between sleep and BMI z scores.
Cross sectionally, shorter sleep duration was associated with higher BMI z scores at 14 (β = -0.034, P < 0.05) and 36 months (β = -0.045, P < 0.05). Sleep duration at 6 or 14 months did not predict BMI z score at either 14 or 36 months. Higher BMI z scores at 6 months predicted shorter sleep duration (hours) at 14 months (β = -0.129, P < 0.001). No association was found between sleep problems and child BMI z scores.
Cross-sectional associations between shorter sleep duration and higher BMI z score emerged in early childhood (age 14 and 36 mo). Higher BMI z scores may precede shorter sleep duration but not vice versa.
相对而言，很少有纵向研究评估年幼儿童睡眠与体重指数（BMI）之间的关联。此外，很少有研究评估睡眠时间与儿童BMI之间的双向纵向关联。
本研究的目的是确定6至36个月大的儿童中：（1）睡眠时间和睡眠问题与儿童BMI z评分的横断面关联；（2）睡眠时间是否能预测儿童BMI z评分的变化；（3）BMI z评分是否能预测儿童睡眠时间的变化。
本研究使用了来自BeeBOFT研究的纵向数据（N = 2308）。儿童睡眠时间和睡眠问题（通过夜间觉醒和入睡潜伏期表示）由家长报告，儿童BMI由经过培训的医疗保健专业人员在大约6、14和36个月大时使用标准化方案进行测量。应用线性混合模型和线性回归模型来评估睡眠与BMI z评分之间的横断面和双向纵向关联。
横断面分析显示，睡眠时间较短与14个月时较高的BMI z评分相关（β = -0.034，P < 0.05）以及36个月时较高的BMI z评分相关（β = -0.045，P < 0.05）。6个月或14个月时的睡眠时间并不能预测14个月或36个月时的BMI z评分。6个月时较高的BMI z评分预测14个月时较短的睡眠时间（小时）（β = -0.129，P < 0.001）。未发现睡眠问题与儿童BMI z评分之间存在关联。
在幼儿期（14和36个月龄）出现了睡眠时间较短与较高BMI z评分之间的横断面关联。较高的BMI z评分可能先于较短的睡眠时间出现，但反之则不然。
