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High prevalence of psoriatic arthritis in patients with severe psoriasis with suboptimal performance of screening questionnaires.
MedLine Citation:
PMID:  22730367     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: The objectives of this study were to: (1) assess the prevalence of psoriatic arthritis (PsA) among Psoriasis (Ps) patients attending dermatology clinics; (2) identify clinical predictors of the development of PsA; and (3) compare the performance of three PsA screening questionnaires: Psoriatic Arthritis Screening and Evaluation (PASE), Psoriasis Epidemiology Screening Tool (PEST) and Toronto Psoriatic Arthritis Screening (ToPAS).METHODS: Patients were divided into two groups: Group-1, consecutive psoriasis patients attending dermatology clinics with no known diagnosis of inflammatory arthritis and Group-2, consecutive patients attending rheumatology clinics with a confirmed diagnosis of PsA. In Group-1, patients completed the screening questionnaires, followed by a full rheumatological evaluation whether or not they reported musculoskeletal symptoms.RESULTS: 200 patients were recruited with 100 in each group. In all, 84% of patients in dermatology group were using systemic therapy for their skin disease, and 99% of patients in rheumatology group were on systemic immunosuppressives. In Group-1, 29% of patients were diagnosed with PsA after rheumatological evaluation. On univariate and multivariate analyses, there was a significant positive association between Psoriasis Area and Severity Index and a new diagnosis of PsA (p=0.046). Different patterns of joint involvement were noted in patients with newly diagnosed PsA versus patients with established PsA with fewer polyarticular disease presentations (p=0.0001). In Group-1, the PEST, PASE and ToPAS assessments had sensitivities of 27.5%, 24% and 41%, and specificities of 98%, 94% and 90%, respectively. In Group-2, the sensitivities were 86%, 62% and 83%, respectively.CONCLUSIONS: 29% of Ps patients attending dermatology clinics had undiagnosed PsA. Psoriasis severity was associated with a new diagnosis of PsA. Poor sensitivities for the screening questionnaires were noted due to inadequate detection of patterns of arthritis other than polyarticular disease.
Authors:
Muhammad Haroon; Brian Kirby; Oliver Fitzgerald
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-23
Journal Detail:
Title:  Annals of the rheumatic diseases     Volume:  -     ISSN:  1468-2060     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372355     Medline TA:  Ann Rheum Dis     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1Department of Rheumatology, St Vincent's University Hospital, Dublin, Ireland.
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