S3 Guideline Diagnosis And Treatment Of Alopecia Areata – Part 1: Diagnosis And Epidemiology

    Ulrike Blume‐Peytavi, Andria Constantinou, Tsenka Tomova‐Simitchieva, Adrian Tanew, Michael Sticherling, Hermann Girschick, Annika Vogt, Uwe Schwichtenberg, Uwe Gieler, André Märtens, Kerstin Zienert, Claudia Stenders, Ricardo Niklas Werner, Doris Wilborn
    TLDR Alopecia areata affects about 0.21% of people in Germany, with 70,000 new cases in 2020.
    The S3 guideline for the diagnosis and treatment of Alopecia areata (AA) was developed by an interdisciplinary expert group from 2023 to 2025. The first part of the guideline focuses on epidemiology and diagnostic recommendations. In Germany, the population-based prevalence of AA was 0.22% in 2016 and 0.21% in 2020, equating to 170,000 affected individuals in 2020. Internationally, the pooled prevalence is 2.1%, with significant regional variations. In 2020, the incidence rate in Germany was 72 new cases per 100,000 people, suggesting approximately 70,000 new AA cases that year.
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