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Genes, Environments, and Sex Differences in Alcohol Research
Jessica E Salvatore1,2, Seung Bin Cho1,3, Danielle M Dick1,3,4
1Department of Psychology, Virginia Commonwealth University, Richmond, Virginia.
Sex differences in alcohol outcomes are significant. Genetic influences on alcohol consumption and alcohol use disorder (AUD) appear consistent across sexes, but sex-specific gene-environment interactions require further study.
Area of Science:
- Behavioral Genetics
- Psychiatric Genetics
- Substance Use Research
Background:
- Scientific reproducibility is enhanced by studying sex differences.
- The National Institutes of Health (NIH) now mandates explicit examination of sex differences.
- Behavioral genetic research on alcohol outcomes requires attention to sex-specific factors.
Purpose of the Study:
- To review sex differences in alcohol outcomes.
- To determine if genetic influences on alcohol consumption and alcohol use disorder (AUD) differ between sexes.
- To explore sex-specific gene-by-environment (G × E) interactions and statistical considerations.
Main Methods:
- Literature review of sex differences in alcohol outcomes.
- Analysis of genetic influences on alcohol consumption and AUD across sexes.
- Description of research designs for studying sex-specific G × E effects.
- Discussion of statistical power and theoretical frameworks for sex-specific genetic effects.
Main Results:
- Robust sex differences exist for many alcohol-related outcomes.
- Evidence suggests genetic influences on alcohol consumption and AUD are similar across sexes.
- Sex-specific G × E effects have been less extensively studied.
Conclusions:
- The NIH policy requires systematic investigation of sex-specific genetic effects in alcohol research.
- Researchers should report statistical power for tests of sex-specific genetic effects.
- Theory-driven hypotheses are crucial for studying sex-specific G × E effects.
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