Fast Five Quiz: The Epidemiology of Psoriatic Arthritis

Eric Ruderman, MD


March 10, 2022

Psoriatic arthritis (PsA) is a chronic, immune-mediated disease of the joints and entheses causing swelling, pain, and stiffness. Genetic, environmental, and immune processes activate an inflammatory response, although not fully understood, primarily affecting the skin and joints. PsA involves both peripheral joints, or less commonly, the axial skeleton.

Approximately 30% of patients with cutaneous psoriasis will later develop PsA, affecting 0.1%-1% of the population. Without treatment, arthritic joint inflammation can progress to erosive bone changes and debilitating pain, emphasizing the importance of early screening and intervention.

How much do you know about the epidemiology of PsA? Test your knowledge with this quick quiz.


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