Baseline characteristics for the entire cohort (N=696) and for the stratified group of women giving birth vaginally (N=545).

Women are grouped according to administration of intrapartum antibiotics. Univariate associations are analyzed using chi-square test, student’s t-test, or Wilcoxon rank-sum test.* : History of doctor diagnosed asthma.** : Low (elementary school or college graduate), Medium (tradesman or medium length), High (university candidate).*** : Low (below 50.000 Euro), Medium (50.000 - 110.000 Euro), High (above 110.000 Euro).