Characteristics of Screen Media Use Associated With Higher BMI in Young Adolescents
Characteristics of Screen Media Use Associated With Higher BMI in Young Adolescents
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DOI：
10.1542/peds.2012-1197
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发表时间：
2013-05-01
期刊：
影响因子：
8
通讯作者：
Rich, Michael
中科院分区：
文献类型：
--
作者：
Bickham, David S.;Blood, Emily A.;Rich, Michael
目的：本研究探讨青少年使用屏幕媒体的特征与他们的BMI之间的关系。通过研究BMI与使用3种屏幕媒体的时间和注意力分配水平之间的关系，我们试图帮助理解媒体使用和肥胖之间的联系机制。方法：我们测量了91名13- 15岁青少年的身高和体重，并计算了他们的bmi。在一周的时间里，参与者完成了工作日和周六24小时的时间使用日记，报告了他们花在电视、电脑和视频游戏上的时间。参与者携带手持电脑，每天通过填写屏幕上的调查问卷来回答4到7个随机信号，报告他们对第一、第二和第三关注的活动。结果：较高的主要关注电视的比例与较高的BMI呈正相关。第25和75百分位对电视的关注之间的差异相当于BMI指数估计为+2.4点。看电视的时间与身体质量指数无关。使用电子游戏或电脑的时间长短和关注程度都与BMI无关。结论：这些发现支持了这样一种观点，即看电视是肥胖风险增加的关键因素。机制可能包括电视广告影响人们对高能量、营养问题食品的偏好，以及/或在看电视时分心进食。干扰这些过程的干预措施可能对减少屏幕媒体使用者的肥胖有效。
OBJECTIVES: This study investigates how characteristics of young adolescents' screen media use are associated with their BMI. By examining relationships between BMI and both time spent using each of 3 screen media and level of attention allocated to use, we sought to contribute to the understanding of mechanisms linking media use and obesity.METHODS: We measured heights and weights of 91 13- to 15-year-olds and calculated their BMIs. Over 1 week, participants completed a weekday and a Saturday 24-hour time-use diary in which they reported the amount of time they spent using TV, computers, and video games. Participants carried handheld computers and responded to 4 to 7 random signals per day by completing onscreen questionnaires reporting activities to which they were paying primary, secondary, and tertiary attention.RESULTS: Higher proportions of primary attention to TV were positively associated with higher BMI. The difference between 25th and 75th percentiles of attention to TV corresponded to an estimated +2.4 BMI points. Time spent watching television was unrelated to BMI. Neither duration of use nor extent of attention paid to video games or computers was associated with BMI.CONCLUSIONS: These findings support the notion that attention to TV is a key element of the increased obesity risk associated with TV viewing. Mechanisms may include the influence of TV commercials on preferences for energy-dense, nutritionally questionable foods and/or eating while distracted by TV. Interventions that interrupt these processes may be effective in decreasing obesity among screen media users.