Data regarding the epidemiology of atopic dermatitis (AD) and associated atopic and psychological comorbidity in adults are limited. 6 Lee S-C. Various diagnostic criteria for atopic dermatitis (AD): a proposal of reliable estimation of atopic dermatitis in childhood (REACH) criteria, a novel questionnaire-based diagnostic tool for AD. Second, disease severity might be a moderator of the association between AD and comorbidities, but data regarding AD severity were not available. [Extracted from the article]