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Childhood Adversity, Monoamine Oxidase A Genotype, and Risk for Conduct Disorder
Debra L. Foley, PhD;
Lindon J. Eaves, PhD, DSc;
Brandon Wormley, BS;
Judy L. Silberg, PhD;
Hermine H. Maes, PhD;
Jonathan Kuhn, PhD;
Brien Riley, PhD
Arch Gen Psychiatry. 2004;61:738-744.
Background Very little is known about how different sets of risk factors interact to influence risk for psychiatric disorder.
Objective To replicate a recent report of a genotype-environment interaction that predicts risk for antisocial behavior in boys.
Design Characterizing risk for conduct disorder in boys in association with monoamine oxidase A genotype and exposure to familial adversity, defined by interparental violence, parental neglect, and inconsistent discipline.
Setting A community-based sample of twin boys.
Participants Five hundred fourteen male twins aged 8 to 17 years.
Main Outcome Measure Conduct disorder.
Results There was a main effect of adversity but not of monoamine oxidase A on risk for conduct disorder. Low monoamine oxidase A activity increased risk for conduct disorder only in the presence of an adverse childhood environment. Neither a passive nor an evocative genotype-environment correlation accounted for the interaction.
Conclusion This study replicates a recent report of a genotype-environment interaction that predicts individual variation in risk for antisocial behavior in boys.
From the Departments of Human Genetics (Drs Foley, Eaves, Silberg, Maes, and Riley) and Psychiatry (Drs Eaves, Kuhn, and Riley and Mr Wormley), Virginia Institute for Psychiatric and Behavioral Genetics, and the Massey Cancer Center (Dr Maes), Virginia Commonwealth University, Richmond.
RELATED LETTER
Promoting Measured Genes and Measured Environments: On the Importance of Careful Statistical Analyses and Biological Relevance
Ridha Joober, Sarojini Sengupta, and Norbert Schmitz
Arch Gen Psychiatry. 2007;64(3):377-378.
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