Objective: The purpose of the present study was to assess the reliability of PASS in evaluating the self-care skills of patient suffering from multiple sclerosis.

Materials & Methods: The present study is an analytic-descriptive study in which 30 adults suffering from multiple sclerosis (MS) underwent reliability evaluation of PASS in Tehran city with an interval of two weeks. Participants were selected using stratified sample selection method. ICC (Intraclass Correlation Coefficient) was utilized to investigate the repeatability of PASS.

Results: ICC for reliability of the test in ADL was 96%, 96%, and 94% for independence, safety, and outcome respectively (P<0.001). The values for IADL were 96% for independence, 98% for safety, and 95% for outcome (P<0.001). Correlation coefficient for mobility was 99% for all 3 aspects of independence, safety, and outcome (P<0.001). The coefficient for self-care was 97%, 98% and 95% for the 3 aspects of independence, safety, and outcome respectively (P<0.001).

Conclusion: These results were indicative of very high reliability of PASS in all 3 aspects of independence, safety, and outcome for adult patients with MS. It can be used as an appropriate tool for research as well as clinical purposes.