{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T07:23:58Z","timestamp":1790234638068,"version":"4.1.0"},"reference-count":46,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2009,1,29]],"date-time":"2009-01-29T00:00:00Z","timestamp":1233187200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arthritis &amp; Rheumatism"],"published-print":{"date-parts":[[2009,2,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To determine the incidence and disease\u2010specific predictors of clinically recognized psoriatic arthritis (PsA) in patients with psoriasis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We identified an incidence cohort of psoriasis subjects age \u226518 years diagnosed between January 1, 1970 and December 31, 1999 in a population\u2010based setting. Psoriasis diagnoses were validated by confirmatory diagnosis in the medical record. Incident and clinically recognized PsA subjects were classified according to the Classification of Psoriatic Arthritis (CASPAR) criteria. Cox proportional hazards models were used to identify predictors of PsA within the psoriasis cohort.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The psoriasis incidence cohort comprised 1,633 subjects. Of these, 40 were diagnosed with PsA concurrently with psoriasis and were excluded from analysis. The remaining 1,593 psoriasis subjects had a mean age of 43 years and 50% were men. Over 20,936 person\u2010years of followup, 57 subjects were clinically recognized with new\u2010onset PsA, with a cumulative incidence of 1.7% (95% confidence interval [95% CI] 1.0\u20132.3%), 3.1% (95% CI 2.2\u20134.1%), and 5.1% (95% CI 3.7\u20136.6%) at 5, 10, and 20 years following psoriasis incidence, respectively. Psoriasis features associated with higher risk of PsA were scalp lesions (hazard ratio [HR] 3.89, 95% CI 2.18\u20136.94), nail dystrophy (HR 2.93, 95% CI 1.68\u20135.12), and intergluteal\/perianal lesions (HR 2.35, 95% CI 1.32\u20134.19). Calendar year was not associated with risk of PsA (\n                      <jats:italic>P<\/jats:italic>\n                      = 0.15), indicating that the likelihood of PsA in psoriasis subjects did not change over time.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>In this population\u2010based study, &lt;10% of patients with psoriasis developed clinically recognized PsA during a 30\u2010year period. Psoriasis features associated with a higher likelihood of PsA were nail dystrophy, scalp lesions, and intergluteal\/perianal psoriasis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/art.24172","type":"journal-article","created":{"date-parts":[[2009,1,29]],"date-time":"2009-01-29T01:33:19Z","timestamp":1233192799000},"page":"233-239","source":"Crossref","is-referenced-by-count":497,"title":["Incidence and clinical predictors of psoriatic arthritis in patients with psoriasis: A population\u2010based study"],"prefix":"10.1002","volume":"61","author":[{"given":"Floranne C.","family":"Wilson","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Murat","family":"Icen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cynthia S.","family":"Crowson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marian 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