Statistics Caution: Stats can be very misleading. Each province has its own criteria for labeling infant and childhood deaths. In Ontario, an infant’s death can only be called a SIDS death if the baby dies and there are no outside stressors: bedding, tummy sleep and co-sleeping to name a few. All other deaths are referred to as SUD- Sudden Unexpectant Death. Some provinces use different names- SIDS, Consistent with SIDS, True SIDS, Unexplained, Undetermined, Natural, and the list continues. For a true number of deaths, you would have to add all categories together. Please remember, the definition of SIDS changed in 2000 so it is impossible to compare deaths prior to 2000 with those of today. Yes, the SIDS rate has been lowered but to what extent is difficult to determine because of the definition change. CFSID’s goal is to improve infant mortality.