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Canadian Occupational Performance Measure performance scale: Validity and responsiveness in chronic pain. Mieke G. Nieuwenhuizen, MSc, PT; Sonja de Groot, PhD; Thomas W. J. Janssen, PhD; Lia C. C. van der Maas, MSc; Heleen Beckerman, PhD. Aim
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Canadian Occupational Performance Measure performance scale: Validity and responsiveness in chronic pain Mieke G. Nieuwenhuizen, MSc, PT; Sonja de Groot, PhD; Thomas W. J. Janssen, PhD; Lia C. C. van der Maas, MSc; Heleen Beckerman, PhD
Aim • Examine construct validity and construct responsiveness of Dutch version of Canadian Occupational Performance Measure performance scale (COPM-P) in chronic pain population. • Relevance • COPM-P has not yet been validated in Dutch pain population.
Method • Subjects: • Newly admitted patients with chronic pain in outpatient rehabilitation clinic. • Measures at admission and 12 wk: • COPM-P, Pain Disability Index (PDI), and RAND 36-Item Health Survey (RAND-36). • Construct validity: • Correlations between COPM-P, PDI, and RAND-36 at admission(n = 87). • Construct responsiveness: • Correlations between change scores at 12 wk (n = 57).
Results • COPM-P did not significantly correlate with PDI or any RAND-36 subscale. • Only a moderate correlation was found between change scores of COPM-P and PDI. • Weak to moderate correlations were found between change scores of COPM-P and RAND-36. • Higher correlations for physical function, social functioning, and role limitations (physical) subscales.
Conclusion • For inpatients with chronic pain attending rehabilitation program, COPM-P measures something different than RAND-36 or PDI. • Therefore, construct validity of COPM-P was not confirmed by our data. • We were not able to find support for COPM-P to detect changes in occupational performance.