Psychometric Properties and Standardization of the Farsi Version of the Physical Activity Scale for the Elderly (PASE) Download PDF

Introduction: Old age is associated with reduced physical ability. It is necessary to measure and evaluate physical activity of the older people and devise appropriate measures to improve it, which itself requires a valid and reliable tool. Therefore, this study aimed to determine the validity and reliability of the Farsi version of Physical Activity Scale for the Elderly (PASE). Method: This study is a descriptive-applied research conducted on 300 older residents of Yazd, Iran. The translation process of the English version of PASE into Farsi was carried out according to the International Quality of Life Assesment (IQOLA) Project protocol. First, the face validity was assessed using the qualitative and quantitative method of the Impact Score. To assess the content validity, the content validity rate (CVR) and the content validity index (CVI) were determined. Afterwards, construct validity was examined through exploratory and confirmatory factor analysis. The reliability of the scale was examined within 2 weeks by 20 older people via calculating the Cronbach’s alpha coefficient, Pearson correlation coefficient and intraclass correlation coefficient; its test-retest reliability was also determined. Results: The experts approved the quality of translation as well as the qualitative and quantitative face validity of all questions except the 7th one. Also, CVR and CVI scores of all questions, except for the 7th one, were higher than 0.6 and 0.79, respectively. With regard to construct validity assessment by exploratory and confirmatory factor analysis, three factors were accepted in terms of fitness. In terms of reliability, a Cronbach’s alpha of 0.94, an intraclass correlation coefficient of 0.99 and a test-retest correlation coefficient of 0.94 were calculated. Conclusion: The process of translating and finding equivalents for PASE tool had a desirable quality. The Farsi version was approved in terms of face, content and construct validity. Cronbach’s alpha and intraclass correlation coefficient confirmed its reliability. Therefore, the Farsi version of this scale can be used to measure physical activity of the older people in order to assess the impact of therapeutic interventions.