Background: Randomized prevention trials provide a unique opportunity to test hypotheses about the interaction of genetic predispositions with contextual processes to create variations in phenotypes over time. Methods: Using two longitudinal, randomized prevention trials, molecular genetic and alcohol use outcome data were gathered from more than…

Results of three national surveys suggest that the prevalence of drinking was lower in nonmetropolitan areas than in metropolitan areas. However, nonmetro and metro areas were similar in the presence of risk for heavy, dependent, and problem drinking. Therefore, they probably share similar risks for health consequences of such levels of…