Basterfield L, Adamson A J, Parkinson K N, Maute U, Li P X, Reilly J J
Human Nutrition Research Centre, School of Clinical Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.
Arch Dis Child. 2008 Dec;93(12):1054-8. doi: 10.1136/adc.2007.135905. Epub 2008 Sep 9.
Public health surveillance of physical activity in children in the UK depends on a parent-reported physical activity questionnaire which has not been validated. We aimed to validate this questionnaire against measurement of physical activity using accelerometry in 6-7-year-old children.
In 130 children aged 6-7 years (64 boys, 66 girls) we estimated habitual moderate-vigorous intensity physical activity (MVPA) using the Health Survey for England parent-report questionnaire for physical activity. For the same time period and the same children, we measured MVPA objectively using 7-day accelerometry with the Actigraph accelerometer.
The questionnaire over-estimated MVPA significantly (paired t test, p<0.01). Mean error (bias) when using the questionnaire was 122 min/day (95% CI 124 to 169). Mean time spent in MVPA was 146 min/day (95% CI 124 to 169) using the questionnaire and 24 min/day (95% CI 22 to 26) using the accelerometer. Rank order correlations between MVPA measured by accelerometer and estimated by the questionnaire were not statistically significant.
Public health surveillance of physical activity should not rely on this questionnaire. Levels of habitual physical activity in children are likely to be substantially lower than those reported in UK health surveys.
英国儿童身体活动的公共卫生监测依赖于一份未经验证的家长报告的身体活动问卷。我们旨在针对使用加速度计测量6至7岁儿童的身体活动情况，对该问卷进行验证。
在130名6至7岁的儿童（64名男孩，66名女孩）中，我们使用英国健康调查中家长报告的身体活动问卷来估计习惯性中等到剧烈强度身体活动（MVPA）。对于同一时间段的同一批儿童，我们使用Actigraph加速度计通过7天的加速度测量法客观地测量MVPA。
该问卷显著高估了MVPA（配对t检验，p<0.01）。使用该问卷时的平均误差（偏差）为122分钟/天（95%置信区间124至169）。使用问卷时，MVPA的平均时长为146分钟/天（95%置信区间124至169），而使用加速度计时为24分钟/天（95%置信区间22至26）。加速度计测量的MVPA与问卷估计的MVPA之间的等级顺序相关性无统计学意义。
身体活动的公共卫生监测不应依赖于这份问卷。儿童习惯性身体活动水平可能远低于英国健康调查中报告的水平。
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