Birth Weight, Schizophrenia, and Adult Mental Disorder
- 1 September 2010
- journal article
- research article
- Published by American Medical Association (AMA) in Archives of General Psychiatry
- Vol. 67 (9), 923-30
- https://doi.org/10.1001/archgenpsychiatry.2010.100
Abstract
Studies linking birth weight and mental illness onset are inconclusive. They have primarily focused on the World Health Organization low birth weight threshold (2500 g) and schizophrenia. To our knowledge, low birth weight per se has not been conclusively linked with schizophrenia risk and specificity of the effect to birth weight below the standard threshold or to particular psychiatric diagnoses has not been demonstrated. To examine whether (1) low birth weight ( or =4500 g) for schizophrenia, any psychiatric diagnoses, and specified psychiatric diagnoses. Schizophrenia was associated with birth weight less than 2500 g. The association was not restricted to birth weight less than 2500 g and there was a significant linear trend of increasing odds ratios with decreasing birth weight across the birth weight range. This was mirrored for any psychiatric diagnosis and for each of the categories of psychiatric disorder. Findings suggest there is an association between birth weight and adult mental disorder, but there is no indication this effect is specific to birth weight less than 2500 g or to schizophrenia. Future research should explore common disorder-specific mechanisms that may link birth weight to development of psychiatric disorder in adulthood.Keywords
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