Fibromyalgia & musculoskeletal pain
Validation of a questionnaire for central nervous system aspects of joint pain: the CAP questionnaire
Authors' conclusion
Central aspects of pain are reliably measured by the CAP questionnaire across a range of painful musculoskeletal conditions, and is a changeable state.
Study context
- Population
- Participants with joint pain in the Investigating Musculoskeletal Health and Wellbeing survey (58% female, median age 71 years)
- Participants
- 3,579 participants
- Comparison
- OA vs Back pain vs FM
- OAn = 1,158
- Back painn = 1,292
- FMn = 177
- Outcome
- CAP questionnaire validation
Methodological detailssurvey-based, factor analysis, paper vs electronic administration reliability (Intraclass Correlation Coefficient (ICC)), 4-year score stability (Friedman test)
- Survey-based
- Factor analysis
- Paper vs electronic administration reliability (ICC)
- 4-year score stability (Friedman test)
Performance
As reported in the abstract
Reliability (ICC, paper vs electronic administration), 95% CI 0.84-0.92
0.89
Widespread pain threshold across the three subgroups: painful sites on the manikin
≥10/26
Correlation of total CAP score with pain severity and quality (r)
0.50-0.72
Further findings
Score stability over 4 years in people with knee pain
- Stable at the group level, but significant temporal heterogeneity within individual participants
Original publication
Validation of a questionnaire for central nervous system aspects of joint pain: the CAP questionnaire. Rheumatology (Oxford). Published 18 June 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →