Manios Y, Androutsos O, Moschonis G, Birbilis M, Maragkopoulou K, Giannopoulou A, Argyri E, Kourlaba G
Department of Nutrition and Dietetics, Harokopio University of Athens, Athens, Greece -
J Sports Med Phys Fitness. 2013 Oct;53(5):502-8.
The aim of this paper was to evaluate the criterion validity of the Physical Activity Questionnaire for Schoolchildren (PAQ-S).
The current study is a subcohort of the Healthy Growth Study, a large-scale cross-sectional study. 202 schoolchildren aged 9-13 years from Greece completed the PAQ-S and wore an accelerometer for 4 consecutive days. Time spent moderate (MPA), moderate to vigorous (MVPA) and vigorous (VPA) physical activity was calculated based on PAQ-S and accelerometer data.
The average time spent on MPA and MVPA as derived from PAQ-S and from accelerometers were significantly moderately correlated (r=0.462, P<0.001 and r=0.483, P<0.001, respectively). No significant correlation was detected between PAQ-S and accelerometer-measured time spent performing VPA (rho=0.150, P=0.057). Intraclass Correlation Coefficient (ICC) indicated a moderate agreement between PAQ-S and accelerometer in estimating MPA (ICC=0.592, P<0.001) and MVPA (ICC=0.581, P<0.001). Bland-Altman analysis revealed a small mean difference (the "bias"), between the two methods, in estimating MPA, although this difference was found to be significantly higher than zero ("bias"=27.4% of the accelerometer-measured mean score, P=0.006). On the other hand, Bland-Altman analysis revealed a large mean difference in estimating MVPA and VPA ("bias"=84.2% and 357% of the accelerometer-measured mean score for MVPA and VPA, respectively and P<0.001). The high correlation coefficient between the average and difference values between all physical activity scores derived from accelerometers and PAQ-S, indicate a systematic overestimation of physical activity time with increasing physical activity for PAQ-S.
The validity of PAQ-S for the estimation of MPA and MVPA was found to be slightly similar self-reported measures for schoolchildren. Therefore, this questionnaire could be used as a tool for physical activity assessment in large population studies.
本文旨在评估儿童身体活动问卷（PAQ-S）的标准效度。
本研究是健康成长研究的一个子队列，这是一项大规模横断面研究。来自希腊的202名9至13岁的学童完成了PAQ-S，并连续4天佩戴加速度计。根据PAQ-S和加速度计数据计算中度（MPA）、中度至剧烈（MVPA）和剧烈（VPA）身体活动所花费的时间。
PAQ-S和加速度计得出的MPA和MVPA平均花费时间呈显著中度相关（分别为r = 0.462，P < 0.001和r = 0.483，P < 0.001）。未检测到PAQ-S与加速度计测量的VPA执行时间之间存在显著相关性（rho = 0.150，P = 0.057）。组内相关系数（ICC）表明PAQ-S与加速度计在估计MPA（ICC = 0.592，P < 0.001）和MVPA（ICC = 0.581，P < 0.001）方面具有中度一致性。Bland-Altman分析显示，在估计MPA时，两种方法之间存在较小的平均差异（“偏差”），尽管发现这种差异显著高于零（“偏差”=加速度计测量平均得分的27.4%，P = 0.006）。另一方面，Bland-Altman分析显示，在估计MVPA和VPA时存在较大的平均差异（“偏差”分别为加速度计测量的MVPA和VPA平均得分的84.2%和357%，P < 0.001）。加速度计和PAQ-S得出的所有身体活动得分的平均值与差值之间的高相关系数表明，随着PAQ-S身体活动量增加，其对身体活动时间存在系统性高估。
发现PAQ-S在估计MPA和MVPA方面的效度与学童自我报告的类似测量方法略有相似。因此，该问卷可作为大规模人群研究中身体活动评估的工具。
