Table 2.

Multivariable logistic regression models of treatment engagement and abstinence.

	B	S.E.	Wald	Sig.	Exp	95% C.I.
						Lower	Upper
Treatment initiation
Primary substance¹	.42	.11	16.22	.00	1.53	1.24	1.88
At least 4 treatment sessions
Primary substance¹	1.50	.35	18.68	.00	4.48	2.27	8.84
Previous treatment episode²	−.37	.24	2.35	.13	.69	.43	1.11
Gender³	.05	.23	.04	.83	1.05	.67	1.64
Age	.02	.02	2.42	.12	1.03	.99	1.06
Socrates Taking Steps	.06	.02	9.05	.00	1.06	1.02	1.11
At least 8 treatment sessions
Primary substance¹	.89	.36	6.08	.01	2.44	1.20	4.94
Previous treatment episode²	−.55	.27	4.00	.05	.58	.34	.99
Gender³	.16	.27	.37	.54	1.18	.70	1.99
Age	.04	.02	6.48	.01	1.05	1.01	1.08
Socrates Taking Steps	.08	.03	10.03	.00	1.08	1.03	1.14
At least 16 treatment sessions
Primary substance¹	1.11	.44	6.50	.01	3.04	1.29	7.13
Previous treatment episode²	−.59	.31	3.68	.06	.56	.307	1.01
Gender³	.01	.30	.00	.99	1.01	.557	1.82
Age	.04	.02	4.56	.03	1.04	1.00	1.08
Socrates Taking Steps	.10	.03	11.25	.00	1.11	1.04	1.18
Abstinence at Treatment Exit
Primary substance¹	.08	.36	.05	.83	1.08	.53	2.20
Socrates Taking Steps	.11	.03	16.50	.00	1.12	1.06	1.18

Notes:

Methamphetamine vs. opioid, with methamphetamine as the reference group.

Coded dichotomously as 0=no prior treatment episodes; 1=at least one prior treatment episode; 1 was the reference group.

Female as the reference group.

Treatment initiation: 0 = attended no treatment sessions, 1 = attended at least 1 session.

At least 4 treatment sessions: 0 = < 4 sessions, 1 = ≥ 4 sessions.

At least 8 treatment sessions: 0 = < 8 sessions, 1 = ≥ 8 sessions.

At least 16 treatment sessions: 0 = < 16 sessions, 1 = ≥ 16 sessions.

Abstinence: 1 = positive urine tox screen, 2 = negative urine tox screen.