Genetic and environmental determinants of violence risk in psychotic disorders: a multivariate quantitative genetic study of 1.8 million Swedish twins and siblings.

https://arctichealth.org/en/permalink/ahliterature286217
Source
Mol Psychiatry. 2016 Sep;21(9):1251-6
Publication Type
Article
Date
Sep-2016
Author
A. Sariaslan
H. Larsson
S. Fazel
Source
Mol Psychiatry. 2016 Sep;21(9):1251-6
Date
Sep-2016
Language
English
Publication Type
Article
Keywords
Adult
Bipolar Disorder - genetics
Comorbidity
Female
Genetic Predisposition to Disease - genetics
Humans
Male
Multivariate Analysis
Psychotic Disorders - etiology - genetics - psychology
Registries
Risk factors
Schizophrenia - genetics
Siblings - psychology
Substance-Related Disorders - genetics - psychology
Sweden
Twins - genetics - psychology
Violence - psychology
Abstract
Patients diagnosed with psychotic disorders (for example, schizophrenia and bipolar disorder) have elevated risks of committing violent acts, particularly if they are comorbid with substance misuse. Despite recent insights from quantitative and molecular genetic studies demonstrating considerable pleiotropy in the genetic architecture of these phenotypes, there is currently a lack of large-scale studies that have specifically examined the aetiological links between psychotic disorders and violence. Using a sample of all Swedish individuals born between 1958 and 1989 (n=3 332 101), we identified a total of 923?259 twin-sibling pairs. Patients were identified using the National Patient Register using validated algorithms based on International Classification of Diseases (ICD) 8-10. Univariate quantitative genetic models revealed that all phenotypes (schizophrenia, bipolar disorder, substance misuse, and violent crime) were highly heritable (h(2)=53-71%). Multivariate models further revealed that schizophrenia was a stronger predictor of violence (r=0.32; 95% confidence interval: 0.30-0.33) than bipolar disorder (r=0.23; 0.21-0.25), and large proportions (51-67%) of these phenotypic correlations were explained by genetic factors shared between each disorder, substance misuse, and violence. Importantly, we found that genetic influences that were unrelated to substance misuse explained approximately a fifth (21%; 20-22%) of the correlation with violent criminality in bipolar disorder but none of the same correlation in schizophrenia (Pbipolar disorder
Notes
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PubMed ID
26666206 View in PubMed
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