Table 1.

Definition of Sudden Infant Death Syndrome (SIDS), Brief Resolved Unexpected Event (BRUE) and Apparent Life-Threatening Event (ALTE).

Definition	Definition
SIDS	Sudden, unexpected death before 12 months of age occurring in a previously healthy infant, in which the cause remains unknown despite thorough investigations (including an appropriate autopsy, death scene investigation, and analysis of the clinical history).
BRUE	Sudden, brief (<1 min) episode without other explainable cause occurring in an infant younger than 12 months of age characterized by ≥1 among cyanosis or pallor, absent/ decreased/ or irregular breathing, marked change in tone, altered level of responsiveness.
ALTE	Episode that is frightening to the observer, characterized by ≥1 among apnoea (central or occasionally obstructive), color change, marked change in muscle tone, choking or gagging.