All indicators were significantly related to the latent variable to which they were assigned at p<0.001. All three predictors (tobacco use, friends’ support of substance use, and effortful control in adolescence) had significant main effects (p<0.001) on problematic tobacco use in early adulthood, and all the regression paths were in the expected direction, with both friends’ support of substance use and effortful control accounting for variation in early-adult tobacco use and dependence in early adulthood, controlling for the level of tobacco use in adolescence. The tobacco interaction model was estimated by adding two interaction terms: Effortful Control × Friends’ Support of Substance Use and Effortful Control × Tobacco Use. The model revealed that neither interaction term contributed significantly to the model.
