title: Country of birth and hospital treatment for psychosis in New South Wales.
abstract: BACKGROUND
  Migration has been found to be a risk factor for schizophrenia in several high-income countries.
  
  
  OBJECTIVE
  To examine whether overseas migrants to New South Wales (NSW) have higher rates of admission to psychiatric hospitals for psychotic disorders, including schizophrenia and mania, compared to people born in Australia.
  
  
  METHODS
  The country of birth of people admitted to public mental health units for the treatment of psychotic illness and for non-psychotic disorders between 2001 and 2010 was compared to the country of birth for the NSW population in the 2006 census. Meta-analysis was used to estimate the odds of being admitted for any psychotic disorder, for a schizophrenia-related psychosis and for mania compared to non-psychotic disorder, for those born in Australia, New Zealand and for nine global regions.
  
  
  RESULTS
  Those born in Oceania (including Melanesia, Fiji, Samoa, Tonga and other Polynesian islands, but excluding Hawaii and New Zealand) had the highest odds of admission for the treatment of psychosis compared to a non-psychotic disorder and had the highest odds of being admitted with a diagnosis of schizophrenia or mania.
  
  
  CONCLUSIONS
  In the years 2001-2010, those born in Oceania were at an increased risk of admission to NSW psychiatric hospitals for the treatment of psychotic illness.
authors.affiliation: Discipline of Psychiatry, University of Sydney, Sydney, Australia.
authors.forename: Olav
authors.initials: O
authors.lastname: Nielssen
authors.forename: Grant
authors.initials: G
authors.lastname: Sara
authors.forename: Yen
authors.initials: Y
authors.lastname: Lim
authors.forename: Matthew
authors.initials: M
authors.lastname: Large
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D001714:Bipolar Disorder / Q000208:ethnology / Q000628:therapy; D054242:Emigrants and Immigrants / Q000523:psychology / Q000706:statistics & numerical data; D005367:Fiji / Q000208:ethnology; D006760:Hospitalization; D006778:Hospitals, Psychiatric / Q000706:statistics & numerical data; D008542:Melanesia / Q000208:ethnology; D009517:New South Wales; D011618:Psychotic Disorders / Q000208:ethnology / Q000628:therapy; D012307:Risk Factors; D018947:Samoa / Q000208:ethnology; D012559:Schizophrenia / Q000208:ethnology / Q000628:therapy; D014058:Tonga / Q000208:ethnology; D000094862:Oceanians / Q000523:psychology / Q000706:statistics & numerical data