Downing Katherine L, Hinkley Trina, Hesketh Kylie D
Centre for Physical Activity and Nutrition Research, Deakin University, Burwood, VIC, Australia.
J Phys Act Health. 2015 Apr;12(4):515-21. doi: 10.1123/jpah.2013-0427. Epub 2014 Aug 22.
There is little current understanding of the influences on sedentary behavior and screen time in preschool children. This study investigated socioeconomic position (SEP) and parental rules as potential correlates of preschool children's sedentary behavior and screen time.
Data from the Healthy Active Preschool Years (HAPPY) Study were used. Participating parents reported their child's usual weekly screen time and their rules to regulate their child's screen time. Children wore accelerometers for 8 days to objectively measure sedentary time.
Children whose parents limited television viewing spent significantly less time in that behavior and in total screen time; however, overall sedentary behavior was unaffected. An association between parents limiting computer/electronic game use and time spent on the computer was found for girls only. SEP was inversely associated with girls', but not boys', total screen time and television viewing.
As parental rules were generally associated with lower levels of screen time, intervention strategies could potentially encourage parents to set limits on, and switch off, screen devices. Intervention strategies should target preschool children across all SEP areas, as there was no difference by SEP in overall sedentary behavior or screen time for boys.
目前对于影响学龄前儿童久坐行为和屏幕使用时间的因素了解甚少。本研究调查了社会经济地位（SEP）和父母规定作为学龄前儿童久坐行为和屏幕使用时间的潜在相关因素。
使用了来自“健康活跃的学前岁月”（HAPPY）研究的数据。参与研究的父母报告了孩子通常每周的屏幕使用时间以及他们管理孩子屏幕使用时间的规定。孩子们佩戴加速度计8天以客观测量久坐时间。
父母限制孩子看电视的孩子在该行为和总屏幕使用时间上花费的时间明显更少；然而，总体久坐行为未受影响。仅在女孩中发现父母限制使用电脑/电子游戏与在电脑上花费的时间之间存在关联。SEP与女孩的总屏幕使用时间和看电视时间呈负相关，但与男孩无关。
由于父母规定通常与较低水平的屏幕使用时间相关，干预策略可能会鼓励父母对屏幕设备设置限制并关闭它们。干预策略应针对所有SEP领域的学龄前儿童，因为男孩在总体久坐行为或屏幕使用时间方面不存在SEP差异。
