The impact of assortative mating, participation bias and socioeconomic status on the polygenic risk of behavioural and psychiatric traits

Brenda Cabrera-Mendoza, Frank R. Wendt, Gita A. Pathak, Loic Yengo () and Renato Polimanti ()
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Brenda Cabrera-Mendoza: Yale School of Medicine
Frank R. Wendt: Yale School of Medicine
Gita A. Pathak: Yale School of Medicine
Loic Yengo: The University of Queensland
Renato Polimanti: Yale School of Medicine

Nature Human Behaviour, 2024, vol. 8, issue 5, 976-987

Abstract: Abstract To investigate assortative mating (AM), participation bias and socioeconomic status (SES) with respect to the genetics of behavioural and psychiatric traits, we estimated AM signatures using gametic phase disequilibrium and within-spouses and within-siblings polygenic risk score correlation analyses, also performing a SES conditional analysis. The cross-method meta-analysis identified AM genetic signatures for multiple alcohol-related phenotypes, bipolar disorder, major depressive disorder, schizophrenia and Tourette syndrome. Here, after SES conditioning, we observed changes in the AM genetic signatures for maximum habitual alcohol intake, frequency of drinking alcohol and Tourette syndrome. We also observed significant gametic phase disequilibrium differences between UK Biobank mental health questionnaire responders versus non-responders for major depressive disorder and alcohol use disorder. These results highlight the impact of AM, participation bias and SES on the polygenic risk of behavioural and psychiatric traits, particularly in alcohol-related traits.

Date: 2024
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DOI: 10.1038/s41562-024-01828-5

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