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Curr Opin Rheumatol. 2002 Mar;14(2):98-103.

Epidemiology of psoriatic arthritis.

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Wellington Regional Rheumatology Unit and Rehabilitation Teaching and Research Unit, Wellington School of Medicine, University of Otago, Wellington, New Zealand.


Research into psoriatic arthritis continues to be hampered by the lack of a validated case-definition. There may be progress toward consensus with a new data-derived diagnostic classification criteria set recently reported and a current international project aiming to firmly validate criteria. Statistical techniques such as latent class analysis may permit a comparison of the accuracy of competing criteria sets, in the absence of a gold standard for diagnosis. Genetic studies are inconclusive, but ethnic differences in disease expression suggest a definite genetic role. Recent community-based research suggests an incidence rate of about 6/100,000 per annum, and a prevalence of about 1/1000. Clinic-based disease may be associated with increased mortality, whereas community based disease is not. The development of internationally accepted criteria for the diagnosis of psoriatic arthritis will be a major impetus towards research into this complex disease.

[Indexed for MEDLINE]

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