title: Population-Based Study of Sleep Apnea in Pregnancy and Maternal and Infant Outcomes.
abstract: To examine the association between sleep apnea and pregnancy outcomes in a large population-based cohort.
  
  
  
  Population-based cohort study using linked birth and hospital records was conducted in New South Wales, Australia. Participants were all women who gave birth from 2002 to 2012 (n = 636,227). Sleep apnea in the year before pregnancy or during pregnancy was identified from hospital records. Outcomes of interest were gestational diabetes, pregnancy hypertension, planned delivery, caesarean section, preterm birth, perinatal death, 5-minute Apgar score, admission to neonatal intensive care or special care nursery, and infant size for gestational age. Maternal outcomes were identified using a combination of hospital and birth records. Infant outcomes came from the birth record. Modified Poisson regression models were used to examine associations between sleep apnea and each outcome taking into account maternal age, country of birth, socioeconomic disadvantage, smoking, obesity, parity, pre-existing diabetes and hypertension.
  
  
  
  Sleep apnea was significantly associated with pregnancy hypertension (adjusted RR 1.43; 95% CI 1.18-1.73), planned delivery (1.15; 1.07-1.23), preterm birth (1.50; 1.21-1.84), 5-minute Apgar < 7 (1.60; 1.07-2.38), admission to neonatal intensive care/special care nursery (1.26; 1.11-1.44), large-for-gestational-age infants (1.27; 1.04-1.55) but not with gestational diabetes (1.09; 0.82-1.46), caesarean section (1.06; 0.96-1.17), perinatal death (1.73; 0.92-3.25), or small-for-gestational-age infants (0.81; 0.61-1.08).
  
  
  
  Sleep apnea is associated with higher rates of obstetric complications and intervention, as well as preterm delivery. Future research should examine if these are independent of obstetric history.
authors.affiliation: Clinical and Population Perinatal Health Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Australia.|Northern Clinical School, Sydney Medical School, University of Sydney, Camperdown, NSW, Australia.
authors.forename: Yu Sun
authors.initials: YS
authors.lastname: Bin
authors.affiliation: Northern Clinical School, Sydney Medical School, University of Sydney, Camperdown, NSW, Australia.|Charles Perkins Centre, Sydney Medical School, University of Sydney, Camperdown, NSW, Australia.|Department of Respiratory and Sleep Medicine, Royal North Shore Hospital, St Leonards, NSW, Australia.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Cistulli
authors.affiliation: Clinical and Population Perinatal Health Research, Kolling Institute, Northern Sydney Local Health District, St Leonards, NSW, Australia.|Northern Clinical School, Sydney Medical School, University of Sydney, Camperdown, NSW, Australia.
authors.forename: Jane B
authors.initials: JB
authors.lastname: Ford
mesh_terms: D000328:Adult; D001034:Apgar Score; D001724:Birth Weight; D002585:Cesarean Section / Q000706:statistics & numerical data; D015331:Cohort Studies; D036861:Delivery, Obstetric / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D009517:New South Wales / Q000453:epidemiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D011256:Pregnancy Outcome / Q000453:epidemiology*; D047928:Premature Birth / Q000453:epidemiology; D012891:Sleep Apnea Syndromes / Q000453:epidemiology*; D055815:Young Adult
keywords: caesarean section; cohort study; gestational diabetes; perinatal death; pregnancy; pregnancy-induced hypertension; premature birth; record linkage; sleep-disordered breathing; small for gestational age