{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T07:35:51Z","timestamp":1784705751299,"version":"3.55.0"},"reference-count":22,"publisher":"The Journal of Rheumatology","issue":"12","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>The objectives of this study were to determine whether patients with oligoarticular presentation differ from those with polyarticular presentation and to identify potential predictors for evolution of oligoarthritis to polyarthritis in patients with psoriatic arthritis (PsA).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patients who entered the University of Toronto PsA clinic between 1978 and 2018 within 12 months of diagnosis were identified. Only patients with \u2265 2 clinic visits were included. Patients were followed at 6- to 12-month intervals according to standard protocol, which included demographics, clinical history, detailed clinical examination, laboratory information, and patient questionnaires. Radiographs were done at 2-year intervals.<jats:italic>Oligoarthritis<\/jats:italic>was defined by the presence of \u2264 4 inflamed joints and<jats:italic>progression<\/jats:italic>as an increase to \u2265 5 joints. Statistical analyses included logistic regression models as well as Weibull regression models, adjusted for age, disease duration, and sex.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of 407 patients, 192 (47%) presented with oligoarthritis. Whereas demographic features were similar to those with polyarthritis, more patients with polyarthritis presented with dactylitis and enthesitis. Similar joint distribution was observed, with small joints of the hands and feet being most commonly affected. Patients with polyarthritis had higher Health Assessment Questionnaire and lower 36-item Short Form Health Survey (SF-36) scores. Of the 192 oligoarticular patients, 117 (61%) remained oligoarticular and 75 (39%) progressed to polyarthritis. A lower SF-36 mental component summary (MCS) score was the predictor for progressing to polyarthritis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Oligoarticular PsA occurs in 47% of patients with PsA and is similar to polyarticular disease, with most patients having small joint involvement. The only predictor for progression to polyarthritis was lower SF-36 MCS.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.210434","type":"journal-article","created":{"date-parts":[[2021,8,1]],"date-time":"2021-08-01T12:25:20Z","timestamp":1627820720000},"page":"1824-1829","source":"Crossref","is-referenced-by-count":16,"title":["Oligoarticular vs Polyarticular Psoriatic Arthritis: A Longitudinal Study Showing Similar Characteristics"],"prefix":"10.3899","volume":"48","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9074-0592","authenticated-orcid":false,"given":"Dafna D.","family":"Gladman","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Justine Y.","family":"Ye","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vinod","family":"Chandran","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7422-1418","authenticated-orcid":false,"given":"Ker-Ai","family":"Lee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard J.","family":"Cook","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2262","published-online":{"date-parts":[[2021,8,1]]},"reference":[{"key":"2023010522252292000_48.12.1824.1","doi-asserted-by":"publisher","DOI":"10.1016\/0049-0172(73)90035-8"},{"key":"2023010522252292000_48.12.1824.2","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2004.032482"},{"key":"2023010522252292000_48.12.1824.3","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1007\/s12016-012-8302-6","article-title":"Psoriatic arthritis: a critical review","volume":"33","author":"Dhir","year":"2013","journal-title":"Clinic Rev Allerg Immunol"},{"key":"2023010522252292000_48.12.1824.4","first-page":"1022","article-title":"Clinical and radiological changes during psoriatic arthritis disease progression: working toward classification criteria","volume":"30","author":"Khan","year":"2003","journal-title":"J Rheumatol"},{"key":"2023010522252292000_48.12.1824.5","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/30.5.339"},{"key":"2023010522252292000_48.12.1824.6","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2008.094946"},{"key":"2023010522252292000_48.12.1824.7","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMra1505557"},{"key":"2023010522252292000_48.12.1824.8","doi-asserted-by":"crossref","first-page":"440","DOI":"10.1016\/j.berh.2019.03.001","article-title":"Opportunities and challenges in the treatment of psoriatic arthritis","volume":"32","author":"FitzGerald","year":"2018","journal-title":"Best Pract Res Clin Rheumatol"},{"key":"2023010522252292000_48.12.1824.9","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1007\/s40744-018-0115-5","article-title":"Oligoarticular psoriatic arthritis: addressing clinical challenges in an intriguing phenotype","volume":"5","author":"Marchesoni","year":"2018","journal-title":"Rheumatol Ther"},{"key":"2023010522252292000_48.12.1824.10","first-page":"127","article-title":"Psoriatic arthritis \u2013 clinical and laboratory analysis of 220 patients","volume":"62","author":"Gladman","year":"1987","journal-title":"Q J Med"},{"key":"2023010522252292000_48.12.1824.11","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/keq262"},{"key":"2023010522252292000_48.12.1824.12","first-page":"62","article-title":"Reliability of measurements of active and damaged joints in psoriatic arthritis","volume":"17","author":"Gladman","year":"1990","journal-title":"J Rheumatol"},{"key":"2023010522252292000_48.12.1824.13","first-page":"1126","article-title":"The clinical assessment of patients with psoriatic arthritis: results of a validation study of the SpondyloArthritis Research Consortium of Canada (SPARCC)","volume":"31","author":"Gladman","year":"2004","journal-title":"J Rheumatol"},{"key":"2023010522252292000_48.12.1824.14","doi-asserted-by":"publisher","DOI":"10.3899\/jrheum.080205"},{"key":"2023010522252292000_48.12.1824.15","doi-asserted-by":"crossref","first-page":"370","DOI":"10.1136\/ard.2006.056457","article-title":"Predictors for radiological damage in psoriatic arthritis","volume":"66","author":"Bond","year":"2007","journal-title":"Results from a single centre. 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