Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, 9000 Ghent, Belgium.
Int J Behav Nutr Phys Act. 2010 May 26;7(1):48. doi: 10.1186/1479-5868-7-48.
A questionnaire to assess physical activity related environmental factors in the European population (a 49-item and an 11-item version) was created as part of the framework of the EU-funded project "Instruments for Assessing Levels of PHysical Activity and fitness (ALPHA)". This paper reports on the development and assessment of the questionnaire's test-retest stability, predictive validity, and applicability to European adults.
The first pilot test was conducted in Belgium, France and the UK. In total 190 adults completed both forms of the ALPHA questionnaire twice with a one-week interval. Physical activity was concurrently measured (i) by administration of the long version of the International Physical Activity Questionnaire (IPAQ) by interview and (ii) by accelerometry (Actigraph device). After adaptations, the second field test took place in Belgium, the UK and Austria; 166 adults completed the adapted questionnaire at two time points, with minimum one-week interval. In both field studies intraclass correlation coefficients (ICC) and proportion of agreement were computed to assess the stability of the two test scores. Predictive validity was examined in the first field test by correlating the results of the questionnaires with physical activity data from accelerometry and long IPAQ-last 7 days.
The reliability scores of the ALPHA questionnaire were moderate-to good in the first field testing (ICC range 0.66 - 0.86) and good in the second field testing (ICC range 0.71 - 0.87). The proportion of agreement for the ALPHA short increased significantly from the first (range 50 - 83%) to the second field testing (range 85 - 95%). Environmental scales from both versions of the ALPHA questionnaire were significantly associated with self-reported minutes of transport-related walking, and objectively measured low intensity physical activity levels, particularly in women. Both versions were easily administered with an average completion time of six minutes for the 49-item version and less than two minutes for the short version.
The ALPHA questionnaire is an instrument to measure environmental perceptions in relation to physical activity. It appears to have good reliability and predictive validity. The questionnaire is now available to other researchers to investigate its usefulness and applicability across Europe.
作为欧盟资助项目“评估身体活动和健身水平的工具（ALPHA）”框架的一部分，创建了一份评估欧洲人群与身体活动相关的环境因素的问卷（49 项和 11 项版本）。本文报告了问卷重测稳定性、预测效度以及对欧洲成年人适用性的开发和评估。
第一次试点测试在比利时、法国和英国进行。共有 190 名成年人在一周的间隔内两次完成了 ALPHA 问卷的两种形式。同时通过（i）通过访谈管理国际体力活动问卷（IPAQ）的长版本和（ii）通过加速度计（Actigraph 设备）来测量体力活动。经过调整后，第二次现场测试在比利时、英国和奥地利进行；166 名成年人在两个时间点完成了适应性问卷，间隔至少一周。在这两项现场研究中，计算了组内相关系数（ICC）和一致性比例，以评估两个测试分数的稳定性。在第一次现场测试中，通过将问卷的结果与加速度计和 IPAQ-最后 7 天的体力活动数据相关联，来检验预测效度。
在第一次现场测试中，ALPHA 问卷的可靠性得分中等至良好（ICC 范围 0.66-0.86），在第二次现场测试中良好（ICC 范围 0.71-0.87）。ALPHA 短问卷的一致性比例从第一次（范围 50-83%）到第二次现场测试（范围 85-95%）显著增加。两种版本的 ALPHA 问卷的环境量表均与自我报告的与交通相关的步行分钟数以及客观测量的低强度体力活动水平显著相关，尤其是女性。两种版本都很容易管理，49 项版本的平均完成时间为六分钟，短版本不到两分钟。
ALPHA 问卷是一种用于测量与身体活动相关的环境感知的工具。它似乎具有良好的可靠性和预测效度。该问卷现已提供给其他研究人员，以在欧洲范围内研究其有用性和适用性。
