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Using a developmental perspective to examine the moderating effects of marriage on heavy episodic drinking in a young adult sample enriched for risk

Published online by Cambridge University Press:  02 July 2020

Seung Bin Cho
Affiliation:
Department of Psychology, Pusan National University, Busan, South Korea Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
Rebecca L. Smith*
Affiliation:
Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA
Kathleen Bucholz
Affiliation:
Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA
Grace Chan
Affiliation:
Department of Psychiatry, University of Connecticut School of Medicine, Farmington, CT, USA
Howard J. Edenberg
Affiliation:
Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN, USA
Victor Hesselbrock
Affiliation:
Department of Psychiatry, University of Connecticut School of Medicine, Farmington, CT, USA
John Kramer
Affiliation:
Department of Psychiatry, University of Iowa, Iowa City, IA, USA
Vivia V. McCutcheon
Affiliation:
Department of Psychiatry, Washington University in St. Louis, St. Louis, MO, USA
John Nurnberger
Affiliation:
Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
Marc Schuckit
Affiliation:
Department of Psychiatry, University of California-San Diego, La Jolla, CA, USA
Yong Zang
Affiliation:
Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
Danielle M. Dick
Affiliation:
Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA Department of Human and Molecular Genetics, Virginia Commonwealth University, Richmond, VA, USA
Jessica E. Salvatore
Affiliation:
Department of Psychology, Virginia Commonwealth University, Richmond, VA, USA Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA, USA
*
Author for correspondence: Jessica E. Salvatore, Department of Psychology, Box 842018, Richmond, VA 23284-2018, USA; E-mail: jesalvatore@vcu.edu.

Abstract

Many studies demonstrate that marriage protects against risky alcohol use and moderates genetic influences on alcohol outcomes; however, previous work has not considered these effects from a developmental perspective or in high-risk individuals. These represent important gaps, as it cannot be assumed that marriage has uniform effects across development or in high-risk samples. We took a longitudinal developmental approach to examine whether marital status was associated with heavy episodic drinking (HED), and whether marital status moderated polygenic influences on HED. Our sample included 937 individuals (53.25% female) from the Collaborative Study on the Genetics of Alcoholism who reported their HED and marital status biennially between the ages of 21 and 25. Polygenic risk scores (PRS) were derived from a genome-wide association study of alcohol consumption. Marital status was not associated with HED; however, we observed pathogenic gene-by-environment effects that changed across young adulthood. Among those who married young (age 21), individuals with higher PRS reported more HED; however, these effects decayed over time. The same pattern was found in supplementary analyses using parental history of alcohol use disorder as the index of genetic liability. Our findings indicate that early marriage may exacerbate risk for those with higher polygenic load.

Information

Type
Regular Articles
Copyright
Copyright © Cambridge University Press 2020

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