Reliability and Validity of the Adapted Persian Version of the Physical Activity Scale for Individuals With Physical Disabilities

The main objective of this study was to culturally adapt the original English version of the Physical Activity Scale For Individuals with Physical Disabilities (PASIPD) for the Persian-speaking patients with Lower-Limb Amputations (LLAs) and to evaluate its reliability and construct validity.

This research was a multicenter cross-sectional and repeated measure study. The cultural adaptation process was conducted according to an accepted international guideline. A total of 197 Persian-speaking individuals with LLA were recruited to investigate the reliability and validity of the PASIPD. Reliability analyses were assessed by Cronbach α and the Pearson product-moment correlation coefficient. The Association between the PASIPD scores and the prosthetic limb user survey of mobility scores was examined to evaluate the convergent validity of the PASIPD. Known-groups validity was assessed based on sex, amputation causes, and amputation levels.

The PASIPD had an acceptable internal uniformity (the Cronbach α of 0.68) and test-retest reproducibility (r=0.70). There was a small correlation between the PASIPD and prosthetic limb user mobility survey (r=0.26; P<0.001). Some items of PASIPD could discriminate individuals with different causes of amputation and sex. Factor analysis extracted four main factors that explained 65.4% of the variance.

The Persian version of the PASIPD has acceptable reliability and validity for assessing the physical activity of persons with LLAs.