How Often Does Psoriatic Arthritis Occur

The exact frequency of psoriatic arthritis is unknown.

Estimates of psoriatic arthritis in the general population have varied from 0.04% in the Faroe Island to 0.1% at the Mayo Clinic.

However, it is likely that this estimate is low. Psoriasis is thought to occur in 1-3% of the population.

If 30% of psoriasis patients have psoriatic arthritis, the frequency in the general population may range from 0.3-1%.