Equation 2—AOR model (odds-ratios adjusted for age, gender, and drug involvement in Wave 1) (2)Log(Odds of Alcohol SUD at Wave2is TRUE) =β0+β1(Wave1Alcohol Status Comparison)+β2(Age) +β3(Gender)+β4(Wave1Status Comparison×Age) +β5(Wave1Status Comparison×Gender) +β6(Wave1Level of Tobacco Involvement) +β7(Wave1Level of Marijuana Involvement)+εi