Relative risk of non-initiation of breastfeeding associated with maternal pre pregnancy BMI.

Note: BMI = Body mass index; CI = confidence interval; RR = Relative risk; Ref = Reference groupa except for place and year of deliveryb Includes age at delivery, ethnic group, marital status, education, household income, smoking status, major or minor breast history, parity, alcohol consumption during pregnancy, any history of drug use and previous breastfeeding experiencec Includes gestational hypertension or HELLP or pre-eclampsia and gestational age at deliveryd Includes newborn’ sex, weight, weight percentile, and apgar at 5 minutesRelative risk of non-initiation of breastfeeding associated with maternal pre pregnancy BMI.