Abstract
Using a questionnaire, we investigated the prevalence and risk factors of allergic diseases in infants living in Osaka City. Out of 905 subjects, the prevalence of atopic dermatitis was 16% in infants up to 1.5 years of age, then increased to 19% up to 3 years of age. The prevalence of bronchial asthma also increased from 6% at 1.5 years of age to 14% at 3 years of age. The family history of allergic diseases, level of eosinophils, and RAST score for egg whites were all significantly correlated with the development of atopic dermatitis. None but atopic dermatitis was the risk factor for the subsequent onset of bronchial asthma.
