The study looked at 333 infants who died of SIDS and 998 age-matched infants who did not die. At 2 weeks of age, 83 percent of controls were being breastfed compared to only 50 percent of SIDS infants. At 1 month of age, corresponding rates were 72 percent versus 40 percent.
Research paper details:
CONCLUSIONS. This study shows that breastfeeding reduced the risk of sudden infant death syndrome by 50% at all ages throughout infancy. We recommend including the advice to breastfeed through 6 months of age in sudden infant death syndrome risk-reduction messages.
These results add "to the body of evidence showing that breastfeeding reduces the risk of sudden infant death syndrome, and that this protection continues as long as the infant is breastfed," the investigators conclude.