Dept of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
J Phys Act Health. 2010 Jul;7(4):541-50. doi: 10.1123/jpah.7.4.541.
The aim of this study was to compare physical activity components in the long, self-administrated version of IPAQ with an accelerometer in a population sample.
In total 980 subjects (18-65 years) wore an accelerometer (Actigraph) for 7 consecutive days and thereafter filled in the IPAQ. Measures of total physical activity, time spent in moderate and in vigorous activity as well as time spent sitting as assessed by the IPAQ and the Actigraph were compared.
The results showed significant low to moderate correlations (Rs = 0.07-0.36) between the 2 instruments and significantly (P < .001) higher values for sitting and vigorous intensity physical activity from the IPAQ compared with the Actigraph. The higher the values reported by the IPAQ the bigger differences were seen between the instruments. Comparison between the tertiles of total physical activity by the 2 instruments showed significant overall association with consistent agreement in the low and the high tertiles.
The long form of IPAQ is a valid measure of physical activity in population research. However, the IPAQ likely overestimates actual physical activity as shown by its limited ability to classify adults into low and high categories of physical activity based on accelerometer data.
本研究旨在比较长的、自我管理的 IPAQ 版本与加速度计在人群样本中的体力活动成分。
共有 980 名受试者（18-65 岁）佩戴加速度计（Actigraph）连续 7 天，然后填写 IPAQ。比较 IPAQ 和 Actigraph 评估的总体力活动量、中强度和高强度活动时间以及久坐时间。
结果显示，两种仪器之间存在显著的低到中度相关性（Rs = 0.07-0.36），与 Actigraph 相比，IPAQ 报告的久坐和剧烈强度体力活动的数值显著更高（P <.001）。IPAQ 报告的值越高，两种仪器之间的差异就越大。两种仪器的总体力活动三分位数之间的比较显示出显著的总体关联，并且在低和高三分位数中具有一致的一致性。
长形式的 IPAQ 是人群研究中体力活动的有效测量工具。然而，IPAQ 可能高估了实际的体力活动，因为它根据加速度计数据将成年人分类为低和高体力活动类别的能力有限。
