综合干预对儿童视屏时间影响的研究OACSTPCD
Effect of comprehensive intervention on children's screen time
目的 分析综合干预项目(DECIDE-children)对儿童视屏时间的影响及可能的中介因素,为控制儿童视屏时间提供依据.方法 于2018年9月至2019年6月,在北京、山西、新疆的24所小学进行整群分层随机抽样,纳入1 392名四年级学生,以1∶1的比例分为干预组或对照组,干预组儿童开展为期一学年的饮食运动行为综合干预,对照组参加常规教学.使用基线和终期随访问卷调查儿童视屏时长和运动与视屏知识、家长对儿童视屏时间的限制相关指标.使用线性回归及广义线性回归模型进行关联研究,非参数百分位Bootstrap法检验中介效应,调整基线调查的年龄和性别.结果 在1 392名调查对象中,基线调查时视屏时间≥2h/d的儿童有289人(20.8％).与基线结果相比,终期干预组中家长限制儿童视屏时间不超过2h/d的比例、儿童的运动与视屏知识满分率增加大于对照组(ORadj=1.64、2.27);儿童视屏时间≥2h/d的比例减少大于对照组(ORadj=0.57)(均P＜0.05).中介效应检验结果显示,家长限制儿童视屏时间不超过2h/d的中介效应占总效应比例为4.01％,儿童运动与视屏知识满分的中介效应占比为11.40％(均P＜0.05).结论 该综合干预项目可以增加儿童视屏时间达到指南标准的比例,其中家长限制儿童视屏时间不超过2h/d和儿童的运动和视屏知识满分发挥了部分中介作用.
Objective To analyze effect of a comprehensive intervention project DECIDE-children on children's screen time and to explore potential mediating factors,so as to provide a basis for controlling children's screen time.Methods A cluster-stratified random sampling was conducted in 24 primary schools in Beijing,Shanxi Province and Xinjiang Uygur Autonomous Region.A total of 1 392 fourth-grade students were enrolled and they were divided into intervention group or control group at a 1:1 ratio.The children in the intervention group received a comprehensive intervention on diet and physical activities for one academic year,while those children in the control group remained to receive regular teaching activities.The data such as children's average daily screen time,knowledge about exercise and screen time,as well as parental limitations on children's screen time were collected by using a questionnaire at baseline and final follow-up survey.Linear regression and generalized linear regression models were applied for association analysis.The non-parametric percentile Bootstrap method was used to test mediating effects to adjust age and gender at baseline.Results At baseline,among the 1 392 study subjects,289 children(20.8% )had a daily screen time ≥ 2 hours.Compared to the baseline,at the final follow-up survey,the proportion of the parents who limited children's screen time less than 2h/d(ORadj=1.64,P=0.002)and the proportion of the children who achieved full scores in exercise and screen knowledge(ORadj=2.27,P＜0.001)in the intervention group increased greatly.And decrement in the proportion of the children with a screen time≥2h/d in the intervention group was greater than the control group(ORadj=0.57,P＜0.001).The mediating effect test shown that the mediating effect of parental limitations on children's screen time less than 2h/d accounted for 4.01% of total effect(P＜0.05),while the mediating effect of children's exercise and screen knowledge accounted for 11.40% of total effect(P＜0.05).Conclusion This comprehensive intervention project can improve the proportion of children with a daily screen time meeting the guideline recommendation,of which,parental limitations on children's daily screen time and children's knowledge of exercise and screen exert partial mediating roles in reducing children's screen time.
王璐;段宇祺;岳芷涵;吕瑾莨;王辉;王海俊
北京大学公共卫生学院妇幼卫生学系,北京 100191
预防医学
视屏时间家长限制儿童知识干预中介效应
screen timeparental limitationchildren knowledgeinterventionmediating effect
《中国妇幼健康研究》 2024 (007)
12-16 / 5
国家自然科学基金项目(81973053);国家重点研发计划项目(2016YFC1300204)
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