Fast Five Quiz: The Epidemiology of Psoriatic Arthritis

Eric Ruderman, MD


March 10, 2022

PsA is heterogeneous and varies among different population groups. According to a meta-analysis by Villani and colleagues, the prevalence of undiagnosed PsA may be as high as 15.5%. Proactive screening may be able to diagnose the condition earlier and optimize patient outcomes.

In approximately 75% of patients with PsA, the onset of skin disease precedes the onset of arthritis. Arthritis and skin disease coincide in approximately 15% of patients. A small percentage of patients, approximately 10%, have no psoriasis at the time of diagnosis.

Although PsA can be diagnosed at any age, the age of onset is characteristically at 30-55 years.

Environmental factors, such as streptococcal infection and recent antibiotic use, have been suggested as a trigger for the development of PsA. However, epidemiologic studies have been inconsistent and difficult to confirm.

Learn more about PsA.


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