Five phenotypes of atopic dermatitis (including an Unaffected/Rare phenotype without atopic dermatitis) identified by latent class analysis on 5927 ALSPAC children whose mothers responded to at least two questionnaires between the ages of 6 months and 14 years. Probabilities of flexural dermatitis and its severity are shown by age for children assigned to each phenotype (missing reports not indicated): Severe-Frequent, n=230 (3.9%); Moderate-Frequent, n=408 (6.9%); Moderate-Declining, n=676 (11%); Mild-Intermittent, n=684 (12%); Unaffected/Rare, n=3929 (66%).