Table 3.

Summary of Analyses of Latent Class Growth Model Analyses with Four Trajectory-Based Groups. Estimates Indicate Probability of Membership in each Group as Compared to Group 1 (Treatment Non-Responders). Effective N=215.

Model	Predictors	Group 2 (Late Responders)			Group 3 (Early Relapsers)			Group 4 (Long-Term Abstainers)
		B	se	t	B	se	t	B	se	t
1	Treatmenta	0.12	0.29	0.40	0.55	0.25	2.17*	.58	0.27	2.15*
2	Continuous Abstinence in Treatment	0.07	0.02	3.13**	0.13	0.02	5.42***	0.17	0.03	5.95***
	Attendance	0.01	0.07	0.11	0.16	0.11	1.46	0.15	0.11	1.29
3	Readiness Change	0.05	0.09	0.56	0.09	0.11	0.79	0.23	0.16	1.50
	Self-efficacy Change	0.48	0.35	1.39	0.78	0.43	1.80	2.61	0.60	4.30***
	Coping Change	0.86	0.44	1.94	0.92	0.48	1.88	0.91	0.40	2.37*
4	Treatmenta	−0.05	0.45	−0.11	0.73	0.64	1.14	1.32	0.73	1.80
	Continuous Abstinence in Treatment	0.09	0.02	3.48***	0.14	0.03	4.85***	0.21	0.05	4.43***
	Attendance	−0.14	0.12	−1.20	0.09	0.16	0.53	0.14	0.21	0.68
	Readiness Change	0.10	0.12	0.81	0.24	0.19	1.26	0.46	0.24	1.94
	Self-efficacy Change	0.97	0.54	1.79	0.90	0..66	1.99*	2.22	0.42	3.75***
	Coping Change	0.55	0.54	1.98*	0.23	0.78	0.29	0.19	0.84	0.23

^aTreatment contrast: MET+CBT+CM_abstinence v. CaseM v MET+CBT+CM_Hmwrk

^*p < .05;

^**p < .01;

^***p < .001