AD incidence at 1 year AD incidence at 1 year P-value
No (n=1089) Yes (n=369)
History of the parent’s allergic disease Yes 571/1087(52.5) 208/367(56.7) 0.169
Sex Boys 451/904 (49.9) 172/295(58.3) 0.012
Exposure to ETS (pregnancy) Yes 568/1023(55.5) 179/346(51.7) 0.221
Delivery method CS 416/1084(38.4) 127/368(34.5) 0.185
Highest education level of the mother High school 56/1626(3.9) 13/289(3.5) 0.077
University/college 814/1626(75.1) 265/289(71.8)
Graduate school 214/1626(19.7) 91/289(24.7)
Breastfeeding at 6 months Yes 853/1042(81.9) 294/358(82.1) 0.912
Exposure to antibiotics during pregnancy Yes 147/1029(14.3) 48/346(13.9) 0.849
Acute bronchiolitis history within 6 months Yes 100/933(10.7) 44/325(13.5) 0.169
Respiratory disease within 6 months Yes 105/934(11.2) 49/325(15.1) 0.069
AOM within 6 months Yes 129/1089(11.8) 44/369(11.9) 0.968