一份简短的自我报告身体活动问卷的收敛效度。
Convergent validity of a brief self-reported physical activity questionnaire.
作者信息
Gabriel Kelley Pettee, Sidney Stephen, Jacobs David R, Quesenberry Charles P, Reis Jared P, Jiang Sheng-Fang, Sternfeld Barbara
机构信息
1Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas Health Science Center at Houston, Austin, TX; 2Division of Research, Kaiser Permanente Northern California, Oakland, CA; 3Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN; and 4Division of Cardiovascular Sciences, Program in Prevention and Population Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD.
出版信息
Med Sci Sports Exerc. 2014 Aug;46(8):1570-7. doi: 10.1249/MSS.0000000000000278.
PURPOSE
The objective of this study is to determine whether summary estimates of a self-report physical activity questionnaire that does not specifically assess frequency or duration (the Coronary Artery Risk Development in Young Adults (CARDIA) physical activity history (PAH)) differs from the summary estimates of one that does (CARDIA Supplemental Questionnaire).
METHODS
After the year 25 examination (2010-2011), 203 CARDIA black and white men and women (age 50.3 ± 3.6 yr) at the Oakland, CA, site participated in this comparison study. The between-questionnaire association and agreement were determined for continuous and categorical estimates on the basis of 1) quartiles and 2) meeting 2008 physical activity guidelines. Differences in participant characteristics by concordance/discordance status were also examined. Finally, receiver operating characteristic curves were computed to determine the accuracy of the PAH compared with the supplemental questionnaire.
RESULTS
Reported physical activity levels were high and varied significantly by race and sex (all P < 0.01). Between-questionnaire estimates were significantly correlated (rho = 0.75 to 0.90, all P < 0.001) and had high agreement (κ = 0.51 to 0.80) across all race/sex groups. A higher proportion of women than men were classified as concordant by quartile of vigorous intensity (P = 0.001), but no other participant characteristics were associated with concordant/discordant quartile ranking. Participants classified as concordant on the basis of physical activity guidelines had lower body mass index than those classified as discordant (both P < 0.05). The area under the curve was 0.95, suggesting that the PAH has high accuracy for classifying individuals as meeting physical activity guidelines.
CONCLUSIONS
Although it is inconvenient that the PAH is not expressed in more standard units, these findings support the practice of not directly assessing frequency and duration, which are frequent sources of reporting error.
目的
本研究的目的是确定一份未专门评估频率或持续时间的自我报告体力活动问卷（青年成人冠状动脉风险发展研究（CARDIA）体力活动史（PAH））的汇总估计值是否与一份专门评估频率或持续时间的问卷（CARDIA补充问卷）的汇总估计值不同。
方法
在25岁检查（2010 - 2011年）后，加利福尼亚州奥克兰市研究点的203名CARDIA研究中的黑人和白人男性及女性（年龄50.3±3.6岁）参与了这项比较研究。基于以下两点确定问卷间的关联和一致性：1）四分位数；2）是否符合2008年体力活动指南对连续和分类估计值进行分析，并检查了根据一致性/不一致性状态划分的参与者特征差异；最后，计算受试者工作特征曲线以确定PAH相对于补充问卷的准确性。
结果
报告的体力活动水平较高且因种族和性别存在显著差异（所有P < 0.01）。问卷间的估计值显著相关（rho = 0.75至0.90，所有P < 0.001），并且在所有种族/性别组中具有高度一致性（κ = 0.51至0.80）。按剧烈强度四分位数分类时，女性被归类为一致的比例高于男性（P = 0.001），但没有其他参与者特征与四分位数的一致/不一致排名相关。根据体力活动指南被归类为一致的参与者的体重指数低于被归类为不一致的参与者（两者P < 0.05）；曲线下面积为0.95，表示PAH在将个体分类为符合体力活动指南方面具有较高准确性。
结论
尽管PAH未以更标准的单位表示不太方便，但这些发现支持不直接评估频率和持续时间的做法，因为频率和持续时间是报告误差的常见来源。
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