title: [High incidence of admissions for schizophrenia in Surinam patients in The Netherlands not caused by preferential immigration of (pre)schizophrenic patients].
abstract: OBJECTIVE
  To answer the question whether positive selection of (pre)schizophrenic Surinams in Surinam before emigration to the Netherlands can explain the high admission rates for schizophrenia of Surinams in the Netherlands.
  
  
  METHODS
  Retrospective research.
  
  
  METHODS
  's Lands Psychiatrisch Ziekenhuis (National Psychiatric Hospital) Paramaribo, Surinam (LPZ).
  
  
  METHODS
  The Netherlands Central Bureau of Statistics in Voorburg and the Central Registry Office in Paramaribo provided data on emigration to the Netherlands of the Surinam population and on remigration. Files of (pre)schizophrenic patients were selected from the records of LPZ. Subsequently, these patients were traced and their pattern of migration was studied. Using the chi 2 test the significance of observed differences was assessed.
  
  
  RESULTS
  Surinam (pre)schizophrenic patients did not emigrate more frequently to the Netherlands (6.3%) compared with the Surinam population in general (9.6%) and they remigrated more frequently to Surinam than the Surinams in general.
  
  
  CONCLUSIONS
  The positive selection hypothesis must be rejected.
authors.affiliation: Robert Fleury Stichting, Leidschendam.
authors.forename: J P
authors.initials: JP
authors.lastname: Bogers
authors.forename: J T
authors.initials: JT
authors.lastname: de Jong
mesh_terms: D004641:Emigration and Immigration; D006801:Humans; D015994:Incidence; D009426:Netherlands / Q000453:epidemiology; D010343:Patient Admission / Q000706:statistics & numerical data; D012189:Retrospective Studies; D012559:Schizophrenia / Q000453:epidemiology* / Q000208:ethnology*; D013532:Suriname / Q000208:ethnology