RESUMO
The aim of this study was to evaluate the influence of certain factors on the duration of exclusive breastfeeding during the first 6 months of life. In 597 mothers, 26 variables were assessed during the postpartum period. The mothers were interviewed monthly by telephone about how they were feeding their babies. In 539 mothers (92.2%), complete data were obtained until the sixth month. At discharge, 1 month, 4 months, and 6 months, the frequency of exclusive breastfeeding was 97%, 83%, 56%, and 19%, respectively. The median duration was 4 months. A longer duration of exclusive breastfeeding was significantly associated with positive maternal attitudes toward breastfeeding, adequate family support, good mother-infant bonding, appropriate suckling technique, and no nipple problems. These associations persisted after controlling for maternal education and other confounding variables. Certain maternal factors related to a longer duration of exclusive breastfeeding can be identified in the maternity ward and might contribute to the development of more effective breastfeeding policies.