title: Relationship between sleep position and risk of extreme cardiorespiratory events.
abstract: OBJECTIVE
  To determine whether infants at sleep in the prone side positions are at higher risk for an extreme cardiorespiratory event compared with infants at sleep in the supine position.
  
  
  METHODS
  We used a case-control study to compare sleep position, determined with an accelerometer, in 116 infants during an extreme cardiorespiratory event with that in 231 matched control subjects (2 per case) who did not experience any extreme events during monitoring.
  
  
  RESULTS
  From calculation of adjusted ORs and 95% CIs, infants placed in the prone or side position were no more likely to experience an extreme cardiorespiratory event compared with infants at sleep in the supine position. We used conditional logistic regression to account for the matched design of the study and to adjust for potential confounders or effect-modifiers.
  
  
  CONCLUSIONS
  These findings, coupled with our earlier observation that the peak incidence of severe cardiorespiratory events occurred before the peak incidence of sudden infant death syndrome, strongly suggest that the supine sleeping position decreases the risk of sudden infant death syndrome by mechanisms other than by decreasing extreme cardiorespiratory events detected by monitoring.
authors.affiliation: Department of Pediatrics, UTSW Medical School, Dallas, TX 75390-9063, USA. george.lister@utsouthwestern.edu
authors.forename: George
authors.initials: G
authors.lastname: Lister
authors.forename: Denis V
authors.initials: DV
authors.lastname: Rybin
authors.forename: Theodore
authors.initials: T
authors.lastname: Colton
authors.forename: Timothy C
authors.initials: TC
authors.lastname: Heeren
authors.forename: Carl E
authors.initials: CE
authors.lastname: Hunt
authors.forename: Eve R
authors.initials: ER
authors.lastname: Colson
authors.forename: Marian
authors.initials: M
authors.lastname: Willinger
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Corwin
mesh_terms: D001049:Apnea / Q000453:epidemiology*; D001919:Bradycardia / Q000453:epidemiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D016684:Prone Position; D012307:Risk Factors; D012890:Sleep; D016683:Supine Position