title: What is the mechanism of SIDS? Clues from epidemiology.
abstract: The cause of sudden infant death syndrome (SIDS) is unknown. Many mechanisms have been postulated, although thermal stress, rebreathing of expired gases and infection/inflammation seem the most viable hypotheses for the causation of SIDS. Deaths from SIDS have reduced dramatically following the recommendation not to place infants to sleep prone. Epidemiological data have shown that prone sleeping position is more risky in winter, colder latitudes, higher altitudes, if the infant is unwell or has excessive bedding or clothing. This suggests prone sleeping position involves either directly or indirectly a thermal mechanism. SIDS caused by an infective/inflammatory mechanism might be associated with deaths occurring during the night. Rebreathing of expired gases, airway obstruction, long QT syndrome and other genetic conditions may explain a small number of sudden unexpected deaths in infancy.
authors.affiliation: Department of Paediatrics, University of Auckland, Private Bag 92019, Auckland, New Zealand. e.mitchell@auckland.ac.nz
authors.forename: Edwin A
authors.initials: EA
authors.lastname: Mitchell
mesh_terms: D000402:Airway Obstruction / Q000150:complications / Q000453:epidemiology; D001833:Body Temperature Regulation / Q000502:physiology; D006801:Humans; D007223:Infant; D007239:Infections / Q000150:complications / Q000453:epidemiology; D007249:Inflammation / Q000150:complications / Q000453:epidemiology; D008133:Long QT Syndrome / Q000150:complications / Q000453:epidemiology; D010100:Oxygen / Q000097:blood; D016684:Prone Position / Q000502:physiology; D012307:Risk Factors; D013398:Sudden Infant Death / Q000453:epidemiology* / Q000209:etiology*; D014028:Tobacco Smoke Pollution / Q000009:adverse effects
chemical_list: D014028:Tobacco Smoke Pollution; D010100:Oxygen