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Research Paper|Volume 11, Issue 7|pp 2127—2137

Synergistic interaction between bedtime and eating speed in predicting overweight and obesity in Chinese preschool-aged children

Shufang Liu1,2, Jiachen Zhang1,2, Jia Ma1,2, Yu Shang3, Yanyan Ma3, Xinzhu Zhang1,2,4, Shunan Wang1,2, Yuan Yuan1,2, Xiangling Deng1,2, Wenquan Niu5, Zhixin Zhang2
  • 1Beijing University of Chinese Medicine, Beijing, China
  • 2Department of Pediatrics, China-Japan Friendship Hospital, Beijing, China
  • 3Department of Pediatrics, Beijing Chaoyang District Maternal and Child Health Care Hospital, Beijing, China
  • 4Beijing Hospital of Traditional Chinese Medicine, Beijing, China
  • 5Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, China
Received: January 17, 2019Accepted: April 3, 2019Published: April 12, 2019
https://doi.org/10.18632/aging.101906

Copyright: Liu et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

This study aimed to examine the association of late bedtime and fast eating speed, both individually and interactively, in predicting overweight and obesity in Chinese preschool-aged children. This was a cross-sectional survey among children aged 3–6 years. Overweight and obesity is defined according to the WHO, IOTF, and China criteria, respectively. Total 1123 preschool-aged children were analyzed. After multivariable adjustment, late bedtime after 11:00 pm and fast eating speed increased the risk of overweight and obesity significantly under the WHO (odds ratio [OR]=1.92 and 1.37, 95% confidence interval [CI]: 1.31–2.80 and 1.00–1.88), IOTF (OR=1.47 and 1.46; 95% CI: 1.00–2.15 and 1.07–2.00), and China (OR=1.66 and 1.39; 95% CI: 1.20–2.29 and 1.07–1.80) criteria. Relative to bedtime before 11:00 pm and eating speed ≥30 min, there was a graded increase with presence of either bedtime after 11:00 pm or eating speed 15-30 min and <15 min. Particularly, the presence of both bedtime after 11:00 and eating speed <15 min yielded the largest OR under the WHO (adjusted OR, 95% CI: 3.98, 1.27–12.51), IOTF (3.59, 1.12–11.50), and China (4.84, 1.71–13.69) criteria. Taken together, our findings indicate a synergistic interaction between bedtime and eating speed in predicting overweight and obesity in Chinese preschool-aged children.