[Economic, social, and health determinants that influence exclusive breastfeeding in Colombia].

Exclusive breastfeeding (EBF) is an important practice that offers many benefits, such as nutritional support, prevention of infectious and chronic diseases, and assistance in psychosocial and cognitive development. This study aims to identify the determinants associated with EBF abandonment in 1,527 children under six months of age, based on information collected by the Colombian National Survey of Nutritional Status and the Colombian National Demographic and Health Survey, 2010. This is an observational cross-sectional cohort study, in which a hierarchical Poisson regression model with robust variance was applied; considering in the first level the factors associated with the mother and child and, in the second level, the information of 32 departments and Bogotá. We noticed a high rate abandonment of EBF (57.6%) and its variation between departments. The factors associated with a longer time of EBF were higher maternal schooling level, having a partner, knowledge in breastfeeding, belonging to a lower level of income, living in the eastern region, having delivery assisted by qualified team, and low birth weight. According to the variance partition coefficient (VPC), 3.2% of the probability of abandonment of EBF may be related to factors within the departmental scope. The median odds ratio (MOR) indicates that the individual risk of abandoning EBF of a child would increase by 47% if the child moved from a department with a low prevalence of abandonment to a department with high prevalence. This study allows a better understanding of the abandonment of EBF from its determinants, providing evidence to implement more effective interventions for child nutrition.