SIDS prevention Guidelines from American Academy of Pediatrics AAP Policy Statement "The Changing Concept of Sudden Infant Death Syndrome: Diagnostic Coding Shifts, Controversies Regarding the Sleeping Environment, and New Variables to Consider in Reducing Risk," Oct. 10, 2005 (from AAP website):

In a case-control study in 185 infants who died of SIDS and 312 randomly selected controls, pacifier use during the last sleep was associated with sig. reduction in risk for SIDS (OR 0.08); the effect was seen in all of the various subgroups tested. (BMJ 332:18, 2006--JW)

In a multivariate meta-analysis of data from four case-control studies, usual use of pacifiers was associated with sig. lower risk of SIDS (OR 0.71) (Peds. 116:e716, 2005--JW)