Prevalence of Alopecia Areata in Japan: Estimates from a Nationally Representative Sample

    November 2022 in “ The Journal of Dermatology ”
    Toshihiko Aranishi, Taisuke Ito, Masahiro Fukuyama, Yoshitaka Isaka, deMauri Mackie, Kristen King‐Concialdi, Steven S. Senglaub, Dena H. Jaffe, Yutaka Shimomura, Manabu Ohyama
    TLDR Alopecia areata affects 1.45% of people in Japan, impacting mood and self-esteem, with many not seeking treatment.
    A study conducted in Japan from January to March 2021 surveyed 45,006 participants to assess the prevalence and severity of alopecia areata (AA). The participant-reported point prevalence of AA was 2.18%, while the adjusted prevalence, verified by dermatologists, was 1.45%. The study found that 34.6% of participants with AA had used topical corticosteroids, and many reported negative impacts on mood (70.2%), self-esteem (55.8%), and social interactions (48.9%). Despite these effects, over one-third of those diagnosed were not seeking treatment, highlighting a potential unmet need for effective remedies.
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