Table III.

Mediation of association of stress with drinking behavior by self-reported non-planning, attentional, and motor impulsivity, with gender and IQ as covariates.

	Effect of IV on M (a)	Effect of M on DV (b)	Total effect (c)	Direct effect (c′)	Indirect effect (a × b) (95% CI)	Gender on DV	IQ on DV
Non-planning impulsivity—BIS-11
IV
CAI total	0.19*	0.25*	0.29*	0.24*	0.05* (0.01–0.11)	3.78*	−0.10
Trauma	0.26*	0.26*	0.47*	0.40*	0.07* (0.02–0.14)	3.51*	−0.09
Major life events	0.74*	0.34*	0.29	0.04	0.25* (0.09–0.53)	3.63*	−0.14*
Recent life events	0.29*	0.30*	0.55*	0.47*	0.09* (0.02–0.23)	3.90*	−0.14*
Chronic stressors	0.16*	0.31*	0.18*	0.13	0.05* (0.01–0.11)	4.04*	−0.14*
Attentional impulsivity (BIS)
IV
CAI total	0.19*	0.38*	0.29*	0.22*	0.07* (0.03–0.13)	4.09*	−0.14*
Trauma	0.24*	0.39*	0.47*	0.38*	0.10* (0.04–0.17)	3.85*	−0.13*
Major life events	0.43*	0.47*	0.29	0.09	0.20* (0.01–0.50)	4.07*	−0.18*
Recent life events	0.42*	0.42*	0.55*	0.38*	0.18* (0.08–0.33)	4.23*	−0.18*
Chronic stressors	0.21*	0.44*	0.18*	0.09	0.09* (0.04–0.18)	4.30*	−0.18*
Motor impulsivity (BIS)
IV
CAI total	0.25*	0.42*	0.29*	0.18*	0.11* (0.06–0.18)	3.81*	−0.16
Trauma	0.37*	0.43*	0.47*	0.31*	0.16* (0.09–0.28)	3.61*	−0.15*
Major life events	0.58*	0.54*	0.29	−0.02	0.31* (0.14–0.55)	3.70*	−0.21*
Recent life events	0.46*	0.48*	0.55*	0.34*	0.22* (0.10–0.40)	3.90*	−0.20*
Chronic stressors	0.17*	0.51*	0.18*	0.09	0.09* (0.04–0.16)	4.00*	−0.20*

Notes: IV = independent variable (i.e. CAI total, trauma, major life events, recent life events, chronic stressors); M = mediator (i.e. non-planning impulsivity, attentional impulsivity, motor impulsivity); DV = dependent variable (AUDIT). The total effect is the effect of the IVon the DV without including the mediators in the model. The direct effect is the effect of the IV on the DV, controlling for the effects of the mediators. The indirect effect is the effect of the IV on the DV via the mediator. Gender and IQ were included as covariates in all analyses.

^*denotes significance level of p < 0.05.