title: Labour and delivery complications and schizophrenia. Case-control study using contemporaneous labour ward records.
abstract: BACKGROUND
  Controversy continues regarding an association between obstetric complications and risk of schizophrenia in early adult life.
  
  
  OBJECTIVE
  To compare the rate of labour and delivery complications among persons who developed schizophrenia with controls; to establish whether any complication is associated with later schizophrenia.
  
  
  METHODS
  We located the labour ward records of 431 individuals with schizophrenia and of same-gender controls from the same hospital birth series. Mothers were matched by age, socio-economic group and parity. Individual complications were evaluated blindly using two obstetric complication scales.
  
  
  RESULTS
  Overall, the rate of labour and delivery complications for those who developed schizophrenia did not differ from that of controls. Males who had presented to psychiatric services before the age of 30 had a greater frequency of and more severe labour/delivery complications than their matched controls.
  
  
  CONCLUSIONS
  Other than among young-onset males we found no increase in labour and delivery complications among cases.
authors.affiliation: Cluain Mhuire Community Psychiatric Service, Dublin, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Byrne
authors.forename: R
authors.initials: R
authors.lastname: Browne
authors.forename: N
authors.initials: N
authors.lastname: Mulryan
authors.forename: A
authors.initials: A
authors.lastname: Scully
authors.forename: M
authors.initials: M
authors.lastname: Morris
authors.forename: A
authors.initials: A
authors.lastname: Kinsella
authors.forename: N
authors.initials: N
authors.lastname: Takei
authors.forename: T
authors.initials: T
authors.lastname: McNeil
authors.forename: D
authors.initials: D
authors.lastname: Walsh
authors.forename: E
authors.initials: E
authors.lastname: O'Callaghan
mesh_terms: D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007494:Ireland / Q000453:epidemiology; D008297:Male; D007744:Obstetric Labor Complications / Q000453:epidemiology; D011247:Pregnancy; D012559:Schizophrenia / Q000453:epidemiology / Q000209:etiology*