Validation of the Canadian Occupational Performance Measure in Italian Parkinson’s Disease Clients

Abstract 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.