Differential response to an exclusive breastfeeding peer counseling intervention: the role of ethnicity.

The authors analyzed data from a trial assessing the efficacy of breastfeeding peer counseling (PC) for increasing exclusive breastfeeding (EBF) to (1) examine whether different ethnic groups responded differently to the intervention and (2) document the determinants of EBF. At 2 months postpartum, the prevalence of EBF in the intervention group was 11.4% among Puerto Ricans compared to 44.4% among non-Puerto Ricans (P = .008). Multivariate logistic regression analyses showed that women who had the intention prenatally to engage in EBF were more likely to do so and those whose mothers lived in the United States were less likely to engage in EBF at hospital discharge. At 2 months postpartum, mothers who were breastfed as children were more likely to engage in EBF, whereas non-Puerto Ricans had a significantly greater response to the intervention than Puerto Ricans (odds ratio, 6.40; 95% confidence interval, 1.45-28.33). There is a need for further studies to determine why different ethnic groups respond differently to EBF promotion interventions.