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[目的]分析上海市初中学段青少年屏前时间与肥胖的关系,为开展干预提供依据。[方法]采取二阶段随机抽样的方法。2011年抽取上海市9所中学初中部的学生及其家长为研究对象,共收到有效问卷为4 196份,利用体检信息进行营养状况评价。观察其屏前时间,并采用二分类logistic回归,分析过长屏前时间与肥胖的关系。[结果]51.5%的学生有过长屏前时间。在控制了年龄、性别、膳食行为、睡眠、体力活动、出生体质量和父母的营养状况后,过长屏前时间与肥胖相关,非过长屏前时间相对于过长时间的OR值为0.779。[结论]过长的屏前时间是青少年肥胖的影响因素,需要进一步开展对过长屏前行为影响因素的研究,为开展干预工作提供证据。
[Objective] To analyze the relationship between screen-time and obesity among young people in junior high school in Shanghai and provide the basis for intervention. [Methods] A two-stage random sampling method was adopted. In 2011, a total of 4 196 valid questionnaires were collected from 9 middle school students and their parents in Shanghai. Nutritional status was evaluated using the physical examination information. Observe the screen time, and the use of binary logistic regression analysis of the relationship between long screen time and obesity. [Results] 51.5% of the students had long time in front of the screen. After controlling for age, sex, dietary behaviors, sleep, physical activity, birth weight, and parental nutritional status, the long-ago screen time was associated with obesity. The odds ratio for non-too long screen time versus excessive time was 0.779 . [Conclusion] Excessive screen time is the influencing factor of adolescent obesity. It is necessary to further study the influential factors of pre-screen behavior and provide evidence for the intervention.