Journal
RHEUMATOLOGY
Volume 51, Issue 11, Pages 2058-2063Publisher
OXFORD UNIV PRESS
DOI: 10.1093/rheumatology/kes187
Keywords
screening questionnaire; ePsA; PASE; psoriasis
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Methods. In all, 228 psoriasis patients naive to DMARD treatment were administered two screening questionnaire: the new Early ARthritis for Psoriatic patients (EARP) questionnaire and the existing Psoriatic Arthritis Screening and Evaluation (PASE) questionnaire. The diagnostic accuracy of the two questionnaires for the diagnosis of ePsA was compared by receiving operating characteristics curves. Results. After psychometric analysis, a simplified questionnaire of 10 items was found to have good internal reliability (Cronbach's alpha = 0.83) and was much faster and simpler to administer than the PASE. Both the EARP and PASE questionnaires presented similar receiving operating characteristics curves (specificity 91.6 and 67.2 and sensitivity 85.2 and 90.7, respectively) in identifying ePsA patients by using the cut-off value of 3 for EARP-10 and the standard cut-off value of 44 for PASE. The CASPAR criteria for PsA were present in 61 (26.7%) of the patients at clinical presentation and in 32.9% at 1-year follow-up, and the EARP score of epsilon 3 correlated with clinically determined arthropathy by a rheumatologist. Conclusion. The EARP questionnaire is simple and fast to administer and proved robust for the identification of PsA in the dermatological setting. Dermatologists should consider the EARP for patients attending clinics, as it correlates well with early PsA diagnosis.
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