Which patient groups have the highest prevalence of nail psoriasis?

Updated: Oct 03, 2019
  • Author: Cindy Li, DO; Chief Editor: William D James, MD  more...
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Answer

Answer

Psoriasis tends to run in families. In Farber's questionnaire study of 2100 patients, [3] 36% of patients reported the presence of psoriasis in at least 1 relative. Among siblings, 8% are affected if neither parent has psoriasis. This percentage increases to 16-25% if 1 parent or sibling has the disease, and it reaches up to 75% if both parents are affected. If 1 twin has psoriasis, the other twin is at an increased risk of having psoriasis (25% for fraternal twins, 65% for identical twins).

In Scandinavia, the prevalence rate of nail psoriasis for adults with psoriasis approaches 5%. The prevalence increases with the age of the population studied.


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