Article

Psychometric research on widely used questionnaires aimed at measuring
experiential avoidance of chronic pain has led to inconclusive results. To test
the structural validity, internal consistency, and construct validity of a
recently developed short questionnaire: the Acceptance and Action Questionnaire
II-pain version (AAQ-II-P). Cross-sectional validation study among 388 adult
patients with chronic nonspecific musculoskeletal pain admitted for
multidisciplinary pain rehabilitation in four tertiary rehabilitation centers in
the Netherlands. Cronbach's alpha was calculated to analyze internal consistency.
Principal component analysis was performed to analyze factor structure. Construct
validity was analyzed by examining the association between acceptance of pain and
measures of psychological flexibility (two scales and sum), pain catastrophizing
(three scales and sum), and mental and physical functioning. Interpretation was
based on a-priori defined hypotheses. The compound of the seven items of the
AAQ-II-P shows a Cronbach's alpha of 0.87. The single component explained 56.2%
of the total variance. Correlations ranged from r=-0.21 to 0.73. Two of the
predefined hypotheses were rejected and seven were not rejected. The AAQ-II-P
measures a single component and has good internal consistency, and construct
validity is not rejected. Thus, the construct validity of the AAQ-II-P sum scores
as indicator of experiential avoidance of pain was supported.

Langue : ANGLAIS