The Italian version of the MedRisk instrument for measuring patient satisfaction with physical therapy care: translation, cross-cultural adaptation and measurement properties

The aim of this study was to translate, cross-culturally adapt, and validate the MedRisk Instrument for Measuring Patient Satisfaction with Physical Therapy Care (MRPS) into Italian. The MRPS questionnaire was first translated and cross-culturally adapted into Italian, and then anonymously administered, together with a global rating of change (GRC), to outpatients undergoing physiotherapy. Structural and convergent validity, internal consistency, and interpretability were assessed. Moreover, test-retest reliability was evaluated in a subgroup of participants who completed the MRPS twice. Factor analysis conducted on 200 questionnaires revealed a two-factor structure of the Italian MRPS, with eight items belonging to the internal factor and three to the external factor. The two factors and the total score showed a good-to-excellent internal consistency (Cronbach's alpha coefficients ranging from 0.74 to 0.93), with a moderate-to-excellent reliability (Intraclass Correlation Coefficients ranging from 0.67 to 0.90). The two global satisfaction measures were positively and significantly correlated with all items, while weak correlations emerged with the GRC. Finally, a ceiling effect was observed, with 36% of the subjects achieving the maximum total score. The Italian version of the MRPS is a valid and reliable questionnaire for assessing outpatient satisfaction with physiotherapy care.