Lane Aoife, Harrison Michael, Murphy Niamh
Dept of Health, Sport, and Exercise Science, Waterford Institute of Technology, Waterford, Ireland.
J Phys Act Health. 2014 Jul;11(5):985-91. doi: 10.1123/jpah.2012-0182. Epub 2013 Jun 24.
Independent associations between screen time (ST)/physical activity (PA) and overweight (OW)/obesity have been demonstrated but little research exists on the role of ST among sufficiently active children.
To examine the combined influence of ST and PA on risk of OW/obesity in a nationally representative sample of 9-year-old Irish children.
The sample in this cross sectional analysis contained 8568 children. Self-report parent data were used to group children into ST and PA categories and related to OW/obesity using forced entry logistic regression.
High ST (> 3 hours/day), bedroom TV and mobile phone ownership increased risk of OW/obesity in high and low active children (P < .05). Low PA (<9 bouts fortnightly) was also associated with OW/obesity. In combined analyses, OW/obesity was lowest in the reference low ST/high PA group with ORs of 1.38, 1.63, and 2.07, respectively, in the low ST/low PA, high ST/high PA, and high ST/low PA groups. Access to electronic media, low socioeconomic status, parental obesity, and not engaging in sports were all related to high ST (P < .05).
This study supports findings that ST is associated with OW/Obesity demonstrating this separately in high and low active children.
已有研究表明屏幕时间（ST）/身体活动（PA）与超重（OW）/肥胖之间存在独立关联，但关于ST在运动量充足的儿童中的作用的研究较少。
在具有全国代表性的9岁爱尔兰儿童样本中，研究ST和PA对OW/肥胖风险的综合影响。
该横断面分析样本包含8568名儿童。使用家长自报数据将儿童分为ST和PA类别，并通过强制进入逻辑回归分析与OW/肥胖的关系。
高ST（>3小时/天）、卧室拥有电视和手机会增加运动量高和低的儿童患OW/肥胖的风险（P<.05）。低PA（<每两周9次）也与OW/肥胖有关。在综合分析中，参考的低ST/高PA组中OW/肥胖发生率最低，低ST/低PA、高ST/高PA和高ST/低PA组的比值比分别为1.38、1.63和2.07。使用电子媒体、低社会经济地位、父母肥胖以及不参加体育运动均与高ST有关（P<.05）。
本研究支持ST与OW/肥胖有关的研究结果，并分别在运动量高和低的儿童中证实了这一点。
