The Iranian version of International Physical Activity Questionnaire (IPAQ) in Iran: Content and construct validity, factor structure, internal consistency and stability

3 Abstract: Objective International physical activity questionnaire (IPAQ) was suggested as the instrument of physical activity international measurement by WHO and CDC. The aim of this current study was to establish content and construct validity and reliability of IPAQ based on data from female employees of Tabriz University. Setting 200 female employees of Tabriz University constituted the research sample. Design and method In this cross- sectional study, the construct validity of IPAQ was conducted using exploratory factor analysis (EFA) and Confirmatory factor analysis (CFA). The mean of CVI and CVR was 0.85 and 0.77 respectively and indicated a good content validity for IPAQ. Viramax rotation was used for factor analysis and five factors were defined for IPAQ. Cronbach's Alpha coefficient (0.7) indicated a good internal consistency for this instrument. Spearman Brown correlation coefficient (0.9) showed good test retest reliability. The findings of current study support the face, content and construct validity and the internal consistency and stability of IPAQ-L. This scale intends to fill an important gap long existed for researching and measuring PA among Iranian women employees.