Data from: Validation of the Regicor short physical activity questionnaire for the adult population

Objective: To develop and validate a short questionnaire to estimate physical activity (PA) practice and sedentary behavior for the adult population.
Methods: The short questionnaire was developed using data from a cross-sectional population-based survey (n=6352) that included the Minnesota leisure-time PA questionnaire. Activities that explained a significant proportion of the variability of population PA practice were identified. Validation of the short questionnaire included a cross-sectional component to assess validity with respect to the data collected by accelerometers and a longitudinal component to assess reliability and sensitivity to detect changes (n=114, aged 35 to 74 years).
Results: Six types of activities that accounted for 87% of population variability in PA estimated with the Minnesota questionnaire were selected. The short questionnaire estimates energy expenditure in total PA and by intensity (light, moderate, vigorous), and includes 2 questions about sedentary behavior and a question about occupational PA. The short questionnaire showed high reliability, with intraclass correlation coefficients ranging between 0.79 to 0.95. The Spearman correlation coefficients between estimated energy expenditure obtained with the questionnaire and the number of steps detected by the accelerometer were as follows: 0.36 for total PA, 0.40 for moderate intensity, and 0.26 for vigorous intensity. The questionnaire was sensitive to detect changes in moderate and vigorous PA (correlation coefficients ranging from 0.26 to 0.34).
Conclusion: The REGICOR short questionnaire is reliable, valid, and sensitive to detect changes in moderate and vigorous PA. This questionnaire could be used in daily clinical practice and epidemiological studies.

研究目的：开发并验证一款简短问卷，用于估测成年人群的身体活动（physical activity, PA）水平与久坐行为。
研究方法：本简短问卷基于一项涵盖明尼苏达闲暇时间身体活动问卷（Minnesota leisure-time PA questionnaire）的基于人群的横断面调查数据（样本量n=6352）开发，筛选出了可解释人群身体活动水平变异性显著占比的活动项目。本次简短问卷的验证工作包含两个环节：其一为横断面验证环节，以加速度计（accelerometers）采集的数据作为效标评估问卷的效度；其二为纵向验证环节，用于评估问卷的信度与检测变化的敏感度，该纵向研究共纳入114名年龄介于35至74岁之间的受试者。
研究结果：最终筛选出6类活动，其可解释明尼苏达闲暇时间身体活动问卷所估测的人群身体活动变异性的87%。本简短问卷可估测总体身体活动及按强度划分（轻、中、高强度）的能量消耗，同时包含2道久坐行为相关题目与1道职业性身体活动相关题目。该简短问卷展现出较高的信度，组内相关系数（intraclass correlation coefficients）区间为0.79至0.95。问卷估测的能量消耗与加速度计检测的步数间的斯皮尔曼相关系数（Spearman correlation coefficients）如下：总体身体活动为0.36，中等强度身体活动为0.40，高强度身体活动为0.26。此外，该问卷可有效检测中等强度与高强度身体活动的变化，相关系数区间为0.26至0.34。
研究结论：REGICOR简短问卷具备良好的信度、效度与检测中高强度身体活动变化的敏感度，可应用于日常临床实践与流行病学研究。