Association between the use of a baby's bottle and pacifier and the absence of breastfeeding in the second six months of life.

Introduction: The World Health Organization recommends breastfeeding for two years or more and advises against bottle feeding and pacifier use.
Objective: Investigate the association between bottle feeding and pacifier use, and breastfeeding in the second half-year of life.
Methods: Survey in a municipality of Rio de Janeiro state, in 2006, interviewing those responsible for 580 children aged 6-11 months. Bottle feeding and pacifier use, and variables which in the bivariate analysis were associated with the outcome 'absence of breastfeeding' (≥ 0.20), were selected for multiple analysis. Adjusted prevalence ratios were obtained by a Poisson regression model.
Results: 40% of the children 6-11 months were not being breastfed, 47% used a pacifier and 57% used a bottle. Pacifier use (PR = 3.245; CI95%: 2.490-4.228) and bottle feeding (PR = 1.605; CI95%: 1.273-2.023) were shown to be strongly associated with the outcome, and also with: mother's low schooling (PR = 0.826; CI95%: 0.689-0.990); low birth weight (PR = 1.488; CI95%: 1.159-1.910); mother not being the baby carer (PR = 1.324; CI95%: 1.080-1.622); and increasing age of the baby in days (PR = 1.004; CI95%: 1.002-1.006).
Conclusions: The use of pacifiers and bottles can reduce continued breastfeeding. Stronger discouragement of these artifacts should be adopted in public health policies.