Study population
The demographic characteristics of the participants are shown in Table
1. Children diagnosed with AD at 1 year accounted for 25.3% of the
study subjects, with a higher proportion of boys, when compared to
non-AD children. No significant differences were observed in the
prevalence of antibiotic exposure during pregnancy and history of acute
bronchiolitis within 6 months (p=0.85 and 0.17, respectively).