Childhood maltreatment was related to INT (β = 0.39, p < 0.001) and EXT (β = 0.29, p < 0.001). Parental history of alcohol problems was associated with INT (β = 0.03, p < 0.01) and EXT (β = 0.06, p < 0.01), as was parental history of drug problems (INT β = 0.01, p < 0.01; EXT β = 0.05, p < 0.001), antisocial behavior (INT β = 0.02, p < 0.01; EXT β = 0.10, p < 0.001) and depression (INT (β = 0.16, p < 0.001; EXT β = 0.10, p < 0.01)).