Purslow Lisa R, van Jaarsveld Cornelia H M, Semmler Claudia, Wardle Jane
University College London, London, UK.
Prev Med. 2009 Aug;49(1):28-31. doi: 10.1016/j.ypmed.2009.04.010. Epub 2009 May 4.
To determine whether parental reports of children's physical activity are stable over time and correlate with objectively-measured physical activity.
Participants were 322 twin children from a large UK twin cohort. When the children were aged 4 (1999) and 11 (2006), mothers rated their activity levels using four different measures. These included children's enjoyment of active pastimes, their habitual activity level, their activity compared with others of the same age and sex and a standard scale for 'fidgetiness'. Children wore an Actigraph (model 7164) for 7 consecutive days at the 11 year follow up from which total physical activity was calculated.
From age 4 to 11 amount and enjoyment of physical activity declined, but significant temporal correlations over the 7 year interval (range r=0.19 to 0.52) suggested that relative activity level was maintained. Habitual physical activity level, enjoyment of activity and fidgetiness at age 11 were all significantly associated with activity counts (all p values<0.05).
These results indicate that parental ratings can be valid indicators of children's physical activity, and that children who are perceived to be more active at 4 years are still more active at 11 years.
确定父母对孩子身体活动情况的报告随时间推移是否稳定，以及是否与客观测量的身体活动相关。
参与者为来自英国一个大型双胞胎队列的322名双胞胎儿童。当孩子4岁（1999年）和11岁（2006年）时，母亲们使用四种不同的测量方法对他们的活动水平进行评分。这些方法包括孩子对积极消遣活动的喜爱程度、他们的习惯性活动水平、与同年龄和性别的其他孩子相比的活动情况以及一个“坐立不安”的标准量表。在11岁随访时，孩子们连续7天佩戴活动记录仪（型号7164），由此计算出总的身体活动量。
从4岁到11岁，身体活动的量和喜爱程度有所下降，但在7年的时间间隔内存在显著的时间相关性（范围r = 0.19至0.52），这表明相对活动水平得以维持。11岁时的习惯性身体活动水平、对活动的喜爱程度和坐立不安程度均与活动计数显著相关（所有p值<0.05）。
这些结果表明，父母的评分可以作为孩子身体活动的有效指标，并且在4岁时被认为更活跃的孩子在11岁时仍然更活跃。
