Association among sleep duration, screen time and childhood obesity in school-aged children

LIN Li-zi; GAO Ai-yu; WANG Di; CHENG Yu; CHENG Lan; LI Qin; WANG Hai-jun

doi:10.11852/zgetbjzz2018-26-09-06

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Chinese Journal of Child Health Care ›› 2018, Vol. 26 ›› Issue (9) : 948-951. DOI: 10.11852/zgetbjzz2018-26-09-06

Association among sleep duration, screen time and childhood obesity in school-aged children

LIN Li-zi¹, GAO Ai-yu², WANG Di¹, CHENG Yu¹, CHENG Lan¹, LI Qin¹, WANG Hai-jun¹

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Abstract

Objective To analyze the association among sleep duration (SD), screen time (ST) and childhood obesity in school-aged children, in order to provide evidence for prevention and control of childhood obesity. Methods Custer random sampling was used to recruit 1 889 students from three to five grades in twelve schools of a district in Beijing in September 2013, and the participants were divided into obese and non-obese groups by Chinese standard. Questionnaires were used to require SD, ST and other obesity related factors. The generalized linear mixed model was used to analyze the effect of SD and ST on childhood obesity in school-aged children. Results Totally 27.83% and 77.08% of students could reach the recommended standards of SD and ST. The rate of obesity in children whose SD ≥9 hours/day and ＜9 hours/day, and whose ST ＜2 hours/day and ≥2 hours/day were 19.46% vs 25.88%, and 18.09% vs 29.29% respectively, and the differences were statistically significant (χ²=6.83 and 23.35,all P<0.01). Students were divided into four groups according to the combination of SD (9 hours/day) and ST (2 hours/day).The difference on the obesity rate of the four groups was significant (χ²=28.51,P<0.01). After adjustment for other obesity related factors, children with SD ≥9 hours/day and ST ＜2 hours/day had lower obesity rate than those with SD ＜9 hours/day and ST ≥2 hours/day (OR=0.48,95%CI:0.28~0.81,P =0.011). Conclusions Only 27.83% of students from three to five grades reaches the Chinese standard of SD. Students with SD ≥9 hours/day and ST ＜2 hours/day are less likely to develop obesity. So management of SD and ST is in urgent need in the interventions of childhood obesity.

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obesity / sleep duration / screen time / children

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LIN Li-zi, GAO Ai-yu, WANG Di, CHENG Yu, CHENG Lan, LI Qin, WANG Hai-jun. Association among sleep duration, screen time and childhood obesity in school-aged children[J]. Chinese Journal of Child Health Care. 2018, 26(9): 948-951 https://doi.org/10.11852/zgetbjzz2018-26-09-06

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