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Low birthweight in schizophrenia: prematurity or poor fetal growth?

G N Smith1, S W Flynn, N McCarthy

  • 1Department of Psychiatry, University of British Columbia, Vancouver Hospital Research Pavilion, 828 West 10th Avenue, BC V5Z 1L8, Vancouver, BC, V5Z 1L8, Canada. geoffsm@interchange.ubc.ca

Schizophrenia Research
|March 30, 2001
PubMed

Insights

Low birthweight (LBW) in schizophrenia patients is linked to distinct childhood issues. Premature birth correlates with social withdrawal and early onset, while poor fetal growth is tied to lower educational achievement.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Psychiatry

Background:

  • Low birthweight (LBW) is linked to developmental issues in the general population.
  • The specific contributions of premature birth versus poor fetal growth to childhood development in LBW individuals are not fully understood.
  • Increased rates of LBW are observed in schizophrenia, associated with childhood social withdrawal and early illness onset.

Purpose of the Study:

  • To investigate whether LBW in schizophrenia patients stems from premature birth or poor fetal growth.
  • To determine if these two risk factors (prematurity and poor fetal growth) have different impacts on childhood functioning and age of schizophrenia onset.

Main Methods:

  • Study included 270 patients diagnosed with schizophrenia.
  • Detailed obstetric histories were collected for all participants.
  • Statistical analysis was performed to associate birth characteristics with childhood functioning and illness onset.

Main Results:

  • LBW was prevalent in the patient group and associated with poorer premorbid functioning and earlier age at illness onset.
  • Both premature birth and poor fetal growth occurred at higher rates than in the general population.
  • Prematurity, not poor fetal growth, was linked to premorbid social withdrawal and early onset.
  • Poor fetal growth, not prematurity, was associated with lower educational achievement.

Conclusions:

  • Premature birth and poor fetal growth are distinct risk factors in schizophrenia development.
  • These factors are associated with different patterns of childhood maladjustment.
  • Understanding these distinctions may inform early intervention strategies for individuals at risk of schizophrenia.

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