Pols M A, Peeters P H, Bueno-De-Mesquita H B, Ocké M C, Wentink C A, Kemper H C, Collette H J
Department of Epidemiology, Faculty of Medicine, University of Utrecht, The Netherlands.
Int J Epidemiol. 1995 Apr;24(2):381-8. doi: 10.1093/ije/24.2.381.
In a pilot study for the European Prospective Investigation into Cancer and Nutrition (EPIC) a modification of the Baecke questionnaire on physical activity was tested for repeatability and relative validity in a population of 134 men and women aged 20-70 years.
For the assessment of repeatability Pearson's correlation coefficients and percentages of agreement after classification in tertiles were computed between administrations of the questionnaire at baseline, and after 5 and 11 months. Relative validity was determined by comparing the questionnaire to a four times repeated 3-day activity diary.
Repeatability after 5 and 11 months was good, with test-retest correlation coefficients between 0.65 and 0.89 for main sections of the questionnaire. The percentages of agreement, exceeding chance (Cohen's kappa) were 57% and 56% for men (at 5 and 11 months respectively) and 41% and 46% for women. The correlations with the diaries were 0.56 in men and 0.44 in women. Agreement apart from chance between classification in tertiles for both methods was 35% for men and 10% for women.
These data show that repeatability is good and relative validity as compared to an activity diary is moderate but well within the range of values found in other studies. The questionnaire is more valid in men than in women.
在欧洲癌症与营养前瞻性调查（EPIC）的一项试点研究中，对一份关于体力活动的贝克问卷进行了修改，并在134名年龄在20至70岁之间的男性和女性群体中测试了其重复性和相对效度。
为评估重复性，计算了基线时、5个月后和11个月后问卷两次施测之间的皮尔逊相关系数以及按三分位数分类后的一致百分比。通过将问卷与一份重复四次的为期3天的活动日记进行比较来确定相对效度。
5个月和11个月后的重复性良好，问卷主要部分的重测相关系数在0.65至0.89之间。男性（分别在5个月和11个月时）超过机遇的一致百分比（科恩kappa系数）为57%和56%，女性为41%和46%。与日记的相关性男性为0.56，女性为0.44。两种方法按三分位数分类后除机遇外的一致性男性为35%，女性为10%。
这些数据表明重复性良好，与活动日记相比相对效度中等，但完全在其他研究发现的值范围内。该问卷在男性中比在女性中更有效。
