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Dafna D. Gladman

, Cheryl F. Rosen

, and Vinod Chandran

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date: 27 May 2020

Psoriatic Arthritis is a seronegative inflammatory arthritis associated with psoriasis; its prevalence depends on the prevalence of psoriasis in the population

The prevalence of psoriatic arthritis varies worldwide; it is high in northern Europeans and lowest in Japanese and the indigenous people of South America and Australia

The prevalence in the general population in North America ranges between 0.15-0.25%.

The prevalence of psoriatic arthritis among patients with psoriasis attending psoriasis clinics is between 20-30%, whereas population based studies indicate a lower prevalence of 10-15%

The economic burden of psoriatic arthritis is considerable and is dependent on disease activity and physical function

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