title: Mode of delivery and antenatal steroids and their association with survival and severe intraventricular hemorrhage in very low birth weight infants.
abstract: To determine whether CS delivery and receipt of antenatal steroids (ANS) in vertex-presenting singletons with a gestational age (GA) between 24 and 30 weeks is associated with improved survival and improved severe intraventricular hemorrhage (sIVH)-free survival.
  
  
  
  Multicenter cohort, retrospective analysis of prospectively collected data. Vertex-presenting singletons newborns with GA 24 to 30 weeks, birth weight between 500 and 1500 g, without major congenital malformations, born between 2001 and 2011 at Neocosur centers were included.
  
  
  
  Four thousand three hundred and eighty-six infants fulfilled inclusion criteria: 45.8% were delivered vaginally and 54.2% by cesarean section (CS). Newborns delivered vaginally received less ANS, had lower GA, Apgar scores and a lower incidence of survival and sIVH-free survival (P<0.001). Newborns with better survival were those with ANS, independent of mode of delivery. At 24 to 25 weeks GA, increased survival and sIVH-free survival were associated with ANS and CS delivery, compared with those who received ANS and delivered vaginally.
  
  
  
  Among vertex-presenting singletons with GA 24 to 30 weeks, better survival and IVH-free survival were associated with ANS, independent of mode of delivery. In infants at 24 to 25 weeks gestation the combination of ANS/CS was associated with improvement in both outcomes.
authors.affiliation: Neonatology, Santiago, Chile.
authors.forename: M E
authors.initials: ME
authors.lastname: Hübner
authors.affiliation: Neonatology, Santiago, Chile.
authors.forename: R
authors.initials: R
authors.lastname: Ramirez
authors.affiliation: Neonatology, Santiago, Chile.
authors.forename: J
authors.initials: J
authors.lastname: Burgos
authors.affiliation: Neonatology, Santiago, Chile.
authors.forename: A
authors.initials: A
authors.lastname: Dominguez
authors.affiliation: Neonatology, Santiago, Chile.
authors.forename: J L
authors.initials: JL
authors.lastname: Tapia
mesh_terms: D000074042:Cerebral Intraventricular Hemorrhage / Q000401:mortality* / Q000517:prevention & control; D002585:Cesarean Section / Q000009:adverse effects* / Q000706:statistics & numerical data; D036861:Delivery, Obstetric / Q000009:adverse effects / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D005865:Gestational Age; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D052577:Infant, Extremely Low Birth Weight; D062071:Infant, Extremely Premature; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D012189:Retrospective Studies; D013256:Steroids / Q000627:therapeutic use*
chemical_list: D013256:Steroids