Excerpt
To the Editor:
Psoriatic arthritis (PsA) is an inflammatory arthritis associated with psoriasis with an estimated prevalence in the United States of 0.25%1. The prevalence of PsA in patients with psoriasis is 30%2. Since the prevalence of psoriasis in North America is 2%, the estimated population prevalence of PsA of 0.25% is probably an underestimate3. PsA is thus underdiagnosed. This may be due to the lack of recognition of the condition in family practice and dermatology practice.
The original diagnostic criteria of Moll and Wright are the simplest and the most frequently used4. In order to make the diagnostic criteria…
