Background: There are few prospective observational studies on the prevalence of atopic dermatitis (AD) in children. We aimed to prospectively investigate the dynamics of change in the prevalence of AD from early childhood to adolescence.
Methods: We conducted a survey with a modified questionnaire to diagnose AD based on The International Study of Asthma and Allergies in Childhood questionnaire with 1230 13-year-old children who were born in the Minami ward, Yokohama City between May 2004 and June 2005 and had undergone physical examinations by dermatologists at 3 years of age.