Prevalence and predictors of exclusive breastfeeding at hospital discharge.

OBJECTIVE

To estimate the population-based prevalence and predictors of exclusive breastfeeding at hospital discharge in singleton and twin term newborns.

METHODS

We studied all hospital births in the province of Ontario, Canada, between April 1, 2009, and March 31, 2010, to perform a retrospective cohort study. We included live singleton and twin births, at term (37 0/7 weeks of gestation to 41 6/7 weeks of gestation), with information about feeding at maternal-newborn discharge. Descriptive statistics were performed and logistic regression was used to identify factors related to exclusive breastfeeding.

RESULTS

Our study population consisted of 92,364 newborns, of whom 56,865 (61.6%) were exclusively breastfed at discharge. Older, nonsmoking, higher-income mothers with no pregnancy complications or reproductive assistance were more likely to breastfeed. Mothers of twins were less likely to exclusively breastfeed (adjusted odds ratio [OR] 0.30, 95% confidence interval [CI] 0.25-0.36) as were women who did not attend prenatal classes (adjusted OR 0.80, 95% CI 0.76-0.83). Compared with patients of obstetricians (57%), women cared for by midwives (87%, adjusted OR 4.49, 95% CI 4.16-4.85) and family physicians (67%, adjusted OR 1.54, 95% CI 1.47-1.61) were more likely to exclusively breastfeed. Breastfeeding after a planned (50%, adjusted OR 0.56, 95% CI 0.52-0.60) or unplanned (48%, adjusted OR 0.48, 95% CI 0.44-0.51) cesarean delivery was less common than after a spontaneous vaginal birth (68%). Neonates born at 39, 38, and 37 weeks of gestation (compared with 41 weeks of gestation) were increasingly less likely to breastfeed (adjusted ORs 0.93, 95% CI 0.89-0.98; 0.84, 95% CI 0.80-0.88; and 0.71, 95% CI 0.67-0.76).

CONCLUSION

This large population-based study found that fewer than two thirds of term newborns are exclusively breastfed at hospital discharge, substantially lower than previously reported.

LEVEL OF EVIDENCE

II.