Atopy risk factors at birth and in adulthood.

Objective: To study the association between atopy and variables such as weight, length, and socioeconomic level at birth and in young adulthood.

Methods: A total of 2,063 subjects were investigated in a prospective birth cohort study of individuals born in Ribeirão Preto, Brazil, in 1978/1979, and examined at the age of 23-25 years. Skin prick tests (SPT) for eight common allergens in Brazil were performed.