February 2026 in “Clinical Cosmetic and Investigational Dermatology” This study found that while the global incidence of alopecia areata in individuals aged 0–19 declined from 1990-2021, the total number of cases rose, with higher burdens among females, adolescents, and low-SDI populations, particularly in Central Sub-Saharan Africa; disparities suggest a need for targeted interventions.
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July 2022 in “Frontiers in immunology” This study reports that the global age-standardized incidence and disability-adjusted life-year rates of alopecia areata decreased from 1990 to 2019, with the highest increases in incidence seen in some low SDI regions and countries like Kuwait and South Sudan.
May 2025 in “Acta Dermato Venereologica” This study found that individuals with hospital-treated alopecia areata in Denmark had increased standardized incidence rates of serious infections, herpes zoster infections, lymphoma, cardiovascular events, and death compared to the age- and sex-matched general population.
February 2025 in “PubMed” This study found that although the global incidence of alopecia areata has risen since 1990, age-standardized rates have slightly decreased, with significant comorbidity associations varying by region.
February 2026 in “Frontiers in Public Health” This study identified that while the overall burden of AA among adolescents and young adults globally continues to rise, the age-standardized rates have slightly decreased, with notable disparities across age, gender, region, and socioeconomic status.