RESUMO
OBJECTIVE: To ascertain the relationship between prelacteal feeding, early formula feeding and adverse health outcomes, especially hospitalisation during the first year of life. DESIGN: Multicentre prospective cohort study. SETTING: Six hospitals across three cities in Vietnam. PATIENTS: A total of 2030 pregnant women were recruited at 24-28 weeks of gestation and followed up at hospital discharge, 1, 3, 6 and 12 months post partum. MAIN OUTCOME MEASURES: Rates of infant hospitalisation, diarrhoea and lower respiratory tract infection during the first 12 months. RESULTS: For the final complete sample (n=1709, 84%), about one-quarter of the infants experienced diarrhoea (25.5%) or were admitted to hospital with at least one episode (24.8%), and almost half (47.6%) the cohort contracted lower respiratory tract infection by 12 months. The prevalence of prelacteal feeding was high (56.5%) while formula feeding was common (79.5%) before hospital discharge, both of which increased the risks of adverse health outcomes particularly hospitalisation by approximately 1.5-fold, with adjusted OR (95% CI) 1.43 (1.09 to 1.88) and 1.48 (1.07 to 2.05), respectively for these infants by 12 months, when compared with others who were exclusively breast fed. CONCLUSIONS: Prelacteal feeding and early formula feeding before hospital discharge are associated with higher risks of infection and hospital admission in Vietnamese infants. Support for exclusive breast feeding should be provided to mothers to avoid the adverse consequences of giving formula milk and prelateal foods.