Validation of the Canadian occupational performance measure in Italian Parkinson’s disease clients

Aims: To assess internal consistency, validity and test-retest reliability of Italian version of Canadian Occupational Performance Measure (COPM) in Parkinson's disease (PD) clients.Methods: Sixty-one subjects completed COPM at baseline, 45 attended re-test within 10 days. Internal consistency and test-retest reliability were determined on average satisfaction and performance scores. Hoehn and Yahr (H& Y) scale and MDS-Unified-Parkinson's-Disease-Rating-Scale-part III (MDS-UPDRS-III) were used to evaluate disease severity and construct validity.Results: COPM showed moderate-high internal consistency (Cronbach's alpha 0.684 for performance and 0.805 for satisfaction). Test-retest reliability was moderate for both performance and satisfaction scores ( ICC values 0.545 - CI95% 0.307-0.720, and 0.693 - CI 95% 0.506-0.819, respectively). COPM did not demonstrate significant correlation with H&Y nor MDS-UPDRS-III.Conclusions: COPM is a valid and reliable tool promoting client-centered approach in PD. The role of the client in assessing needs and defining priority outcomes may increase compliance to intervention and awareness of occupational performance.