Timperio A, Salmon J, Crawford D
Centre for Physical Activity and Nutrition Research, School of Health Sciences, Deakin University, Victoria, Australia.
J Sci Med Sport. 2003 Dec;6(4):477-91. doi: 10.1016/s1440-2440(03)80273-6.
This study examined the validity and reliability of survey items measuring one-week recall of physical activity (PA) and examined differences by weight status. A sub-aim of the study was to objectively assess the intensity of activity that most closely matches self-report. A questionnaire was administered to adults twice, three days apart. It was again administered after subjects wore a MTI/CSA accelerometer for seven days (n = 118). Several metabolic equivalent (MET) thresholds were applied to the accelerometer data. Agreement between test and re-test estimates of sufficient physical activity for health benefits (150 min/week) was high (% agreement > 90%). Correlations (rho) between total reported PA (mins/day) and accelerometer data were 0.29 (p < 0.05) among men and 0.25 (p < 0.05) among women. Among men, self-reported duration of moderate PA (3-5.9 METS) and accelerometer data were significantly correlated (rho = 0.40, p < 0.01), with no differences by weight status. Among women, a significant relationship was found only for those who were not overweight (rho = 0.52, p < 0.001). A significant correlation between self-reported duration of vigorous PA (6+ METS) and accelerometer data was only found for overweight men (rho = 0.40, p < 0.05). When lower MET thresholds were applied to the accelerometer data, women's reported duration of moderate-intensity PA was most strongly correlated with moderate PA (accelerometer) defined as 2.0-5.9 METS (rho = 0.39, p < 0.01). The recall instrument provides a consistent measure of physical activity and validation coefficients were similar to those obtained for other physical activity recall questionnaires. However, the ability to measure PA by self-report may vary by weight status.
本研究检验了测量一周体力活动（PA）回忆情况的调查问卷项目的有效性和可靠性，并考察了不同体重状况下的差异。该研究的一个次要目标是客观评估与自我报告最相符的活动强度。对成年人进行了两次问卷调查，间隔三天。在受试者佩戴MTI/CSA加速度计七天后（n = 118）再次进行问卷调查。对加速度计数据应用了多个代谢当量（MET）阈值。健康获益所需的充足体力活动（每周150分钟）的重测估计值之间的一致性较高（一致性百分比>90%）。男性中，报告的总PA（分钟/天）与加速度计数据之间的相关性（rho）为0.29（p < 0.05），女性中为0.25（p < 0.05）。在男性中，自我报告的中等强度PA（3 - 5.9 METS）持续时间与加速度计数据显著相关（rho = 0.40，p < 0.01），且不受体重状况影响。在女性中，仅在非超重女性中发现显著关系（rho = 0.52，p < 0.001）。仅在超重男性中发现自我报告的剧烈PA（6 + METS）持续时间与加速度计数据之间存在显著相关性（rho = 0.40, p < 0.05）。当对加速度计数据应用较低的MET阈值时，女性报告的中等强度PA持续时间与定义为2.0 - 5.9 METS的中等PA（加速度计测量）相关性最强（rho = 0.39，p < 0.01）。该回忆工具提供了一致的体力活动测量方法，验证系数与其他体力活动回忆调查问卷所得系数相似。然而，通过自我报告测量PA的能力可能因体重状况而异。
