Article

The construct validity and construct responsiveness of the performance scale of
the Canadian Occupational Performance Measure (COPM) was measured in 87 newly
admitted patients with chronic pain attending an outpatient rehabilitation
clinic. At admission and after 12 wk, patients completed a COPM interview, the
Pain Disability Index (PDI), and the RAND 36-Item Health Survey (RAND-36). We
determined the construct validity of the COPM by correlations between the COPM
performance scale (COPM-P), the PDI, and the RAND-36 at admission. Construct
responsiveness was assessed by calculating the correlations between the change
scores (n = 57). The COPM-P did not significantly correlate with the PDI (r =
-0.260) or with any subscale of the RAND-36 (r = -0.007 to 0.248). Only a
moderate correlation was found between change scores of the COPM-P and PDI (r =
-0.380) and weak to moderate correlations were found between change scores of the
COPM-P and the RAND-36 (r = -0.031 to 0.388), with the higher correlations for
the physical functioning, social functioning, and role limitations (physical)
subscales. In patients with chronic pain attending our rehabilitation program,
the COPM-P measures something different than the RAND-36 or PDI. Therefore,
construct validity of the COPM-P was not confirmed by our data. We were not able
to find support for the COPM-P to detect changes in occupational performance.

Langue : ANGLAIS