Faculty of Health Sciences, School of Nursing, University of Namibia, Windhoek 10005, Namibia.
Physical Activity for Health Group, University of Strathclyde, Glasgow G1 1QE, Scotland.
J Public Health (Oxf). 2021 Dec 10;43(4):e706-e712. doi: 10.1093/pubmed/fdaa067.
Monitoring population-level physical activity is crucial for examining adherence to global guidelines and addressing obesity. This study validated self-reported moderate-to-vigorous physical activity (MVPA) against an accurate device-based method in Namibia.
Adolescent girls (n = 52, mean age 16.2 years [SD 1.6]) and adult women (n = 51, mean age 31.3 years [SD 4.7]) completed the PACE+/GPAQ self-report questionnaires and were asked to wear an Actigraph accelerometer for 7 days. Validity of self-reported MVPA was assessed using rank-order correlations between self-report and accelerometry, and classification ability of the questionnaires with Mann-Whitney tests, kappa's, sensitivity and specificity.
In the adolescents, Spearman's rank coefficients between self-reported MVPA (days/week) and accelerometry measured MVPA were positive but not significant (r = 0.240; P = 0.104). In the adults, self-reported MVPA (minutes/day) was moderately and significantly correlated with accelerometer-measured MVPA (r = 0.396; P = 0.008). In both groups, there was fair agreement between accelerometry and questionnaire-defined tertiles of MVPA (adolescents κ = 0.267; P = 0.010; adults κ = 0.284; P = 0.008), and measured MVPA was significantly higher in the individuals self-reporting higher MVPA than those reporting lower MVPA.
The PACE+ and GPAQ questionnaires have a degree of validity in adolescent girls and adult females in Namibia, though more suitable for population than individual level measurement.
监测人群水平的身体活动对于检查对全球指南的遵守情况和解决肥胖问题至关重要。本研究在纳米比亚验证了基于自我报告的中度至剧烈身体活动（MVPA）与准确的基于设备的方法。
青少年女孩（n=52，平均年龄 16.2 岁[SD 1.6]）和成年女性（n=51，平均年龄 31.3 岁[SD 4.7]）完成了 PACE+/GPAQ 自我报告问卷，并被要求佩戴 Actigraph 加速度计 7 天。使用自我报告和加速度计之间的等级相关系数评估自我报告的 MVPA 的有效性，并使用 Mann-Whitney 检验、kappa、灵敏度和特异性评估问卷的分类能力。
在青少年中，自我报告的 MVPA（天/周）与加速度计测量的 MVPA 之间的 Spearman 等级系数为正但不显著（r=0.240；P=0.104）。在成年人中，自我报告的 MVPA（分钟/天）与加速度计测量的 MVPA 中度且显著相关（r=0.396；P=0.008）。在两组中，加速度计和问卷定义的 MVPA 三分位数之间存在适度的一致性（青少年 κ=0.267；P=0.010；成年人 κ=0.284；P=0.008），并且自我报告较高 MVPA 的个体比报告较低 MVPA 的个体的测量 MVPA 明显更高。
PACE+和 GPAQ 问卷在纳米比亚的青少年女孩和成年女性中具有一定的有效性，尽管更适合于人群而不是个体水平的测量。
