Article

OBJECTIVE: To examine the measurement properties of the Chronic Pain Acceptance
Questionnaire Revised (CPAQ-R) and its subscales with people with knee
osteoarthritis using Rasch analysis. DESIGN: Cross-sectional questionnaire study.
PATIENTS: A total of 176 participants with radiographic evidence of
osteoarthritis of the knee, as identified by a Kellgren-Lawrence grade >/= 2, and
pain on most days for at least the past month. METHODS: Participants completed
the CPAQ-R at home within a set of measures covering different aspects of
osteoarthritis pain. The questionnaires were returned by pre-paid envelope. Rasch
analysis was conducted on the Activity Engagement and Pain Willingness subscales
and the Total scale using Rasch Unidimensional Measurement Models (RUMM2020).
RESULTS: The Activity Engagement and Pain Willingness subscales fit the Rasch model following minimal changes, including re-scoring and removal of item 14 due
to misfit. Both subscales passed tests of unidimensionality. Although the Total
scale could be adjusted to yield adequate fit statistics, it demonstrated
multidimensionality. CONCLUSION: The Activity Engagement and Pain Willingness
subscales have good measurement properties for 2 distinct factors relevant to
pain acceptance. CPAQ-R is a valid measurement tool that may help target and
evaluate response to treatments that address low activity engagement and pain
willingness in people with osteoarthritis.

Langue : ANGLAIS