Vasculitis & polymyalgia rheumatica
Validation of a patient-reported outcome measure for giant cell arteritis
Authors' conclusion
The final GCA-PRO is a 30-item, four-domain scale with robust evidence of validity and reliability in measuring HRQoL in people with GCA.
Study context
- Population
- UK patients with clinician-confirmed GCA285 (67%) female
- Participants
- 428 patients
- Outcome
- Final scale structure and measurement properties of the GCA patient reported outcome (GCA-PRO) measure
Methodological detailsRasch analysis, exploratory factor analysis, test-retest (3 days apart)
- Rasch analysis
- Exploratory factor analysis
- Test-retest (3 days apart)
Main finding
As reported in the abstract
- Candidate items eliminated by Rasch analysis
- 10
- Overall scale Rasch model fit (adequate), χ2
- 25.219
- Rasch model fit, degrees of freedom
- 24
- Rasch model fit, P
- P = 0.394
Observational data: associations, not effects.
Original publication
Validation of a patient-reported outcome measure for giant cell arteritis. Rheumatology (Oxford). Published 5 May 2023. doi:10.
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