Translation, Reliability Assessment, and Validation of the Persian Version of MedRisk Instrument for Measuring Patient Satisfaction With Physical Therapy Care (20-Item MRPS)

Introduction: This study aimed to evaluate the reliability and validity of the Persian version of the 20item version #xA0;of the MedRisk. Materials and Methods: In our study, we used a crosssectional and prospective validation study design. This research was a test development study involving 297 outpatients with musculoskeletal disorders from the physiotherapy centers in Kerman City, Iran, in 2017. All patients completed the MedRisk instrument for measuring patient satisfaction with physical therapy care. Participants also answered a demographic questionnaire, visual analog score, and global rating of change. Internal consistency and reproducibility were investigated, too. To determine testretest reliability, 40 randomly selected patients completed the MedRisk instrument again 57 days after their treatment. Factor analysis, divergent validity, convergent validity, and the floor and ceiling effects were tested, too. The Ethics Committee of the University of Social Welfare and Rehabilitation Sciences, Tehran, Iran, reviewed and approved this research project. The SPSS software24 was used for statistical analysis. Results: Dimension of MedRisk demonstrated a high internal consistency (the Cronbach alpha=0.82). Reproducibility was also satisfactory (intraclass correlation coefficient=0.76). The standard error of measurement, minimal detectable changes, and coefficients of variation indices were respectively 0.63, 1.76, and 0.13 for the total score. In factor analysis, the 4factor solution has emerged. The external validity testing revealed that the MedRisk instrument score correlated negatively with the visual analog scale (r=0.18, P=0.002) and global rating of change (r=0.19, P=0.001). Eighteen individual items of MedRisk were positively correlated with global satisfaction. The results showed that items 5 and 7 had a floor effect, and all other items except items 4, 5, and 7 had a ceiling effect. Conclusion: The Persian version of the MedRisk instrument is a valid and reliable instrument for measuring patient satisfaction with physical therapy and can be used in a clinical setting.