Table 4.

Conditional Intent-to-Treat Models of PTSD Symptoms and Substance Use

PTSD Symptoms	CAPS Total Score		CAPS Re-experiencing		CAPS Avoidance/Numbing		CAPS Hyperarousal		PCL-M
	B	SE	B	SE	B	SE	B	SE	B	SE
Intercept (Baseline)	74.1***	2.7	21.7***	1.1	34.9***	1.3	18.0	0.9	59.7***	1.75
Group	10.3*	4.4	−0.6	1.8	6.6**	2.1	1.9	1.5	2.0	2.61
Session (linear)	−4.3***	04	−1.4***	0.1	−1.9***	0.2	−0.9***	0.1	−2.8***	0.48
Session2 (quadratic)	--	--	--	--	--	--	--	--	0.1*	0.03
Group by session	1.3*	0.6	0.8***	0.2	0.8*	0.3	0.5**	0.2	1.0*	0.39
Substance Use	Any Substance Use		Any Alcohol Use		PDU Any Substance		PDU Alcohol		Drinks per Drinking Da
	B	SE	B	SE	B	SE	B	SE	B	SE
Threshold/Intercept	−3.7***	0.9	−3.0***	0.7	52.5***	5.2	53.0***	5.4	6.9	0.6
Group	0.3	1.2	0.6	1.0	3.0	7.1	−4.1	7.1	1.8	1.2
Session (linear)	−0.7	0.1	−0.8***	0.1	−4.0*	1.4	−4.8**	1.2	−0.7***	0.2
Session2 (quadratic)	0.0***	0.0	0.0***	0.0	0.2*	0.1	0.3**	0.1	0.1***	0.0
Group by session	0.0	0.2	0.1	0.1	−0.7	0.9	0.3	0.7	−0.1	0.1
Depression	BDI-II
	B	SE
Intercept	26.5***	1.8
Group	2.2	2.6
Session (linear)	−1.3***	0.2
Session2	--	--
Group by session	0.6†	0.3

Note. Continuous outcomes are modeled among those reporting any use. Intercepts and session slopes are adjusted for current major depressive episode at baseline. Substance/alcohol use (0 = no use, 1 = any use). Treatment condition (0 = COPE, 1 = RP). PTSD = posttraumatic stress disorder; CAPS = Clinician Administered PTSD Scale; PCL-M = PTSD Checklist-Military; PDU = percent days use; BDI-II = Beck Depression Index-II; SE = standard error.

^*p<.05,

^**p<.01,

^***p<.001,

^†p = .07.