Logistic regression model predicting the probability of admission to special care baby unit with respiratory distress by gestation, from a randomised trial of 998 mothers scheduled for ECS at term (≥37 weeks). Mothers in the treatment arm (n=508) received 2 doses of betamethasone 48 hours before delivery. Adapted from Stutchfield P, Whitaker R, Russell I: Antenatal betamethasone and incidence of neonatal respiratory distress after elective caesarean section: pragmatic randomised trial. Bmj 331:665,2005, with permission