Validity and reliability study of the turkish version of "REGICOR Short Physical Activity Questionnaire"

This study aimed to adapt the REGICOR Short Physical Activity Questionnaire into Turkish and evaluate its cultural adaptation, validity, and reliability for assessing physical activity in adults. Additionally, the study sought to compare the face-to-face and online administration of the questionnaire. A total of 273 healthy individuals (126 males, 147 females) aged 18-65 participated in the study. The translation and cultural adaptation of the questionnaire followed a standardized and accepted procedure. Demographic information was recorded, and the questionnaire was administered to the participants both in face-to-face and online formats under the supervision of an administrator. For concurrent validity, the International Physical Activity Questionnaire-Short Form (IPAQ-SF) was employed. The reliability study utilized the test-retest method, with the questionnaire being re-administered to participants one week later. The questionnaire demonstrated moderate reliability for light, moderate, and vigorous physical activities (ICC=0.618; 0.686; 0.620), and good reliability for total physical activity (ICC=0.711). A moderate positive correlation was found between the questionnaire and the IPAQ-SF for light and total physical activity (r=0.527; 0.564, p<0.05), while a weak positive correlation was observed for vigorous physical activity (r=0.331, p<0.05). No correlation was found for moderate physical activity (p>0.05). In accordance with the secondary aim of the study, participants who completed the online version of the questionnaire demonstrated good reliability for moderate and vigorous physical activities (ICC=0.801; 0.752), and excellent reliability for light and total physical activities (ICC=0.956; 0.931). For validity, moderate positive correlations were found for light, vigorous, and total physical activities (r=0.446; 0.442; 0.505, p<0.05), while no correlation was found for moderate physical activity (p>0.05). These results suggest that the questionnaire can be used as a reliable tool for assessing physical activity, and that the mode of administration influences its validity and reliability. However, due to the limited validity in terms of weak to moderate correlations, caution is advised when interpreting the results.