Genetic epidemiology is the study of how genetic factors may influence health. Twin and adoption studies have shown that about half of the risk of alcohol use disorders (AUDs) is due to differences in the genotypes that people carry, yet few specific genes that play a causal role have been identified. Scientists believe AUDs are highly polygenic – involving many genes – likely thousands. However, genetic risk for AUD may differ among populations. This study evaluated whether the genetic risk for AUDs differed among four population samples.
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