Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas School of Public Health, Austin Regional Campus, University of Texas Administration Building (UTA), 1616 Guadalupe Street - Suite 6.338, Austin, TX 78701, USA.
Public Health Nutr. 2011 Mar;14(3):435-42. doi: 10.1017/S1368980010002612. Epub 2010 Sep 15.
To examine the reliability and convergent validity of physical activity (PA) and inactivity estimates obtained with the past-week Modifiable Activity Questionnaire (PWMAQ).
The PWMAQ, an interviewer-administered questionnaire, was administered twice, one week apart, during visits 3 and 4 of six total visits. Intra-class correlation coefficients (ICC) between administrations of the PWMAQ were used to assess the reliability of summary estimates. Spearman rank-order correlation coefficients (ρ) were used to examine the associations of PWMAQ summary estimates with temporally matched and averaged accelerometer data in all participants and then stratified by whether the data were reflective of usual PA.
Data were obtained from the Evaluation of Physical Activity Measures in Middle-Aged Women (PAW) study.
Sixty-six women, mean age 52·6 (sd 5·4) years.
The reliability of the PWMAQ physical inactivity estimate suggested substantial agreement over one week (ICC = 0·77, 95 % CI 0·57, 0·82; P < 0·0001). With the exception of light-intensity PA, the PWMAQ leisure PA estimate was significantly associated with averaged accelerometer data (ρ = 0·33-0·76; P < 0·05). For both temporally matched and averaged accelerometer data, correlation coefficients were higher between the PWMAQ estimate and moderate-walk- to vigorous-intensity PA in those who indicated that reported activity was reflective of usual PA; however, the association with moderate-lifestyle-intensity PA was higher in those reporting that data were not reflective.
The PWMAQ is a reliable and valid measure of leisure PA levels in middle-aged women and supports subsequent studies evaluating this questionnaire in other population subgroups.
检验过去一周可修正活动问卷（PWMAQ）获得的体力活动（PA）和不活动估计值的可靠性和聚合效度。
PWMAQ 是一种访员管理的问卷，在总共 6 次访视的第 3 和第 4 次访视期间，相隔一周进行两次测试。两次 PWMAQ 测试的组内相关系数（ICC）用于评估综合估计值的可靠性。Spearman 秩相关系数（ρ）用于检验 PWMAQ 综合估计值与所有参与者在时间上匹配和平均的加速度计数据的相关性，然后根据数据是否反映了通常的 PA 进行分层。
数据来自中年女性体力活动评估研究（PAW）。
66 名女性，平均年龄 52.6（标准差 5.4）岁。
PWMAQ 非体力活动估计值的可靠性表明在一周内具有实质性的一致性（ICC = 0.77，95%CI 0.57，0.82；P < 0.0001）。除了低强度 PA 外，PWMAQ 休闲 PA 估计值与平均加速度计数据显著相关（ρ = 0.33-0.76；P < 0.05）。对于时间匹配和平均加速度计数据，PWMAQ 估计值与报告活动反映通常 PA 的参与者的中等到剧烈强度步行 PA 之间的相关系数较高；然而，在报告数据不反映通常 PA 的参与者中，与中等生活方式强度 PA 的相关性更高。
PWMAQ 是一种可靠且有效的中年女性休闲 PA 水平测量工具，支持后续研究在其他人群亚组中评估该问卷。
