Alopecia Areata - Epidemiology

Epidemiology

See also: List of human leukocyte antigen alleles associated with cutaneous conditions

The condition affects 0.1%–0.2% of humans, occurring in both males and females. Alopecia areata occurs in people who are apparently healthy and have no skin disorder. Initial presentation most commonly occurs in the late teenage years, early childhood, or young adulthood, but can happen with people of all ages. Patients also tend to have a slightly higher incidence of conditions related to the immune system: asthma, allergies, atopic dermal ailments, and hypothyroidism.