Ekelund Ulf, Sepp Hanna, Brage Sören, Becker Wulf, Jakes Rupert, Hennings Mark, Wareham Nicholas J
Medical Research Council Epidemiology Unit, Elsie Widdowson Laboratory, Fulbourn Road, Cambridge CB1 9NL, UK.
Public Health Nutr. 2006 Apr;9(2):258-65. doi: 10.1079/phn2005840.
To examine the validity of the short, last 7-day, self-administered form of the International Physical Activity Questionnaire (IPAQ).
All subjects wore an accelerometer for seven consecutive days and completed the IPAQ questionnaire on the eighth day. Criterion validity was assessed by linear regression analysis and by modified Bland-Altman analysis. Specificity and sensitivity were calculated for classifying respondents according to the physical activity guidelines of the American College of Sports Medicine/Centers for Disease Control and Prevention.
Workplaces in Uppsala, Sweden.
One hundred and eighty-five (87 males) participants, aged 20 to 69 years.
Total self-reported physical activity (PA) (MET-min day(-1)) was significantly correlated with average intensity of activity (counts min(-1)) from accelerometry (r = 0.34, P < 0.001). Gender, age, education and body mass index did not affect this relationship. Further, subcomponents of self-reported PA (time spent sitting, time in PA, time in moderate and vigorous activity (MVPA)) were significantly correlated with objectively measured PA (P < 0.05). Self-reported time in PA was significantly different from time measured by accelerometry (mean difference: -25.9 min day(-1); 95% limits of agreement: -172 to 120 min day(-1); P < 0.001). IPAQ identified 77% (specificity) of those who met the current PA guidelines of accumulating more than 30 min day(-1) in MVPA as determined by accelerometry, whereas only 45% (sensitivity) of those not meeting the guidelines were classified correctly.
Our results indicate that the short, last 7-days version of the IPAQ has acceptable criterion validity for use in Swedish adults. However, the IPAQ instrument significantly overestimated self-reported time spent in PA. The specificity to correctly classify people achieving current PA guidelines was acceptable, whereas the sensitivity was low.
检验国际体力活动问卷（IPAQ）简短的、最后7天的自我管理形式的有效性。
所有受试者连续7天佩戴加速度计，并在第8天完成IPAQ问卷。通过线性回归分析和改良的布兰德-奥特曼分析评估标准效度。根据美国运动医学学院/疾病控制与预防中心的体力活动指南对受访者进行分类，计算特异性和敏感性。
瑞典乌普萨拉的工作场所。
185名（87名男性）年龄在20至69岁之间的参与者。
自我报告的总体力活动（PA）（代谢当量-分钟/天（-1））与加速度计测量的平均活动强度（计数/分钟（-1））显著相关（r = 0.34，P < 0.001）。性别、年龄、教育程度和体重指数不影响这种关系。此外，自我报告的PA子成分（久坐时间、进行PA的时间、中等强度和剧烈强度活动（MVPA）的时间）与客观测量的PA显著相关（P < 0.05）。自我报告的进行PA的时间与加速度计测量的时间有显著差异（平均差异：-25.9分钟/天（-1）；95%一致性界限：-172至120分钟/天（-1）；P < 0.001）。IPAQ识别出77%（特异性）的人达到了当前PA指南中规定的每天累积MVPA超过30分钟的标准，这一标准是通过加速度计确定的，而在未达到指南标准的人群中，只有45%（敏感性）被正确分类。
我们的结果表明，IPAQ简短的、最后7天的版本在瑞典成年人中具有可接受的标准效度。然而，IPAQ工具显著高估了自我报告的进行PA的时间。正确分类达到当前PA指南标准的人的特异性是可以接受的，而敏感性较低。
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