Association of alopecia areata with alcohol use disorder, attention-deficit hyperactivity disorder and insomnia: a case-control analysis using the All of Us research programme Https://doi.org/10.1093/ced/llad084 Dear Editor, Alopecia areata (AA) is a chronic inflammatory disorder typically characterized by nonscaly, discrete patches of nonscarring hair loss. After applying the Benjamini-Hochberg procedure to account for the false discovery rate, we found AA to be significantly associated with alcohol use disorder (AUD), attention deficit hyperactivity disorder (ADHD) and insomnia (Table 1). [Extracted from the article]