Article

PURPOSE: To examine the fit between data from the Short Form McGill Pain
Questionnaire (SF-MPQ-2) and the Rasch model, and to explore the reliability and
internal responsiveness of measures of pain in people with knee osteoarthritis.
METHODS: Participants with knee osteoarthritis completed the SF-MPQ-2,
Intermittent and Constant Osteoarthritis Pain questionnaire (ICOAP) and
painDETECT. Participants were sent the same questionnaires 3 and 6 months later.
RESULTS: Fit to the Rasch model was not achieved for the SF-MPQ-2 Total scale.
The Continuous subscale yielded adequate fit statistics after splitting item 10
on uniform DIF for gender, and removing item 9. The Intermittent subscale fit the
Rasch model after rescoring items. The Neuropathic subscale had relatively good
fit to the model. Test-retest reliability was satisfactory for most scales using
both original and Rasch scoring ranging from fair to substantial. Effect sizes
ranged from 0.13 to 1.79 indicating good internal responsiveness for most scales.
CONCLUSIONS: These findings support the use of ICOAP subscales as reliable and
responsive measure of pain in people with knee osteoarthritis. The MPQ-SF-2
subscales found to be acceptable alternatives. Implications for Rehabilitation
The McGill Pain Questionnaire short version 2 is not a unidimensional scale in
people with knee osteoarthritis, whereas three of the subscales are
unidimensional. The McGill Pain Questionnaire short version 2 Affective subscale
does not have good measurement properties for people with knee osteoarthritis.
The McGill Pain Questionnaire short version 2 and the Intermittent and Constant
Osteoarthritis Pain scales can be used to assess change over time. The painDETECT
performs better as a screening measure than as an outcome measure.

Langue : ANGLAIS