Table 4.

Results from Multilevel Mediation Analyses of PDA Over Time as a Function of Treatment Condition. N = 193.

Mediator	A-Path		B-Path				Indirect Effect
	B	SE	B	SE	B	Z	95% CI		Proportion of Total Effect
							Lower	Upper
Social Network Variables
Behavioral Support for Abstinence	0.057***	0.012	0.287*	0.084	0.012	2.175*	0.004	0.019	.30
Social Support for Drinking	0.040	0.054	−0.012	0.019	0.000	0.481	−0.007	0.008	.00
AA Meetings	4.822***	0.653	0.004*	0.001	0.019	3.517***	0.015	0.024	.32
Cognitive-Behavioral Processes
Abstinence Self-Efficacy	5.471**	1.989	0.002**	0.001	0.011	2.266*	0.004	0.018	.70
Coping Strategies	0.030	0.028	0.046	0.037	0.001	0.819	−0.006	0.009	.30
Readiness to Change	0.935*	0.410	0.002	0.002	0.002	0.916	−0.004	0.008	.44
Emotional Distress Variables
Brief Symptom Inventory Distress	−3.551***	0.644	−0.003*	0.001	0.014	1.880†	−0.005	0.024	.34
Social Interaction Anxiety Scale	0.458	0.461	−0.003	0.002	0.001	0.828	−0.005	0.008	.38

Note: A-Path: Effect of Treatment Condition on the mediator. B-path: Effect of mediator on outcome (PDA over time). Indirect effect: The effect of Treatment on PDA over time that is accounted for by the mediator variable. Proportion of Total Effect: Proportion of the total effect of treatment on PDA outcome that is attributable to the mediator variable. Treatment Condition was coded as PCBT= −.5; NS = .5.

^†p < .10

^*p < .05.

^**p < .01.

^***p < .001.