Table 3.

Results of Mixed Effects Models

	Main Effects			Interactions
	Time	DBT PE Initiation	DBT PE Completion	Time × DBT PE Initiation		Time × DBT PE Completion
	B (SE)	B (SE)	B (SE)	B (SE)	g	B (SE)	g
PTSDa	−11.7 (2.3)***	−0.8 (2.6)	−1.9 (3.0)	−8.8 (4.0)*	0.5	−11.0 (5.0)*	0.5
Dissociationb	−1.1 (0.4)*	0.6 (0.9)	0.1 (1.0)	0.3 (0.5)	0.2	−0.7 (1.1)	0.1
Posttraumatic cognitionsc	−36.9 (8.0)***	16.6 (13.5)	−0.8 (17.0)	−34.1 (14.7)*	0.6	−17.6 (18.6)	0.2
Emotion dysregulationd	−16.8 (3.9)***	2.1 (5.3)	5.2 (6.5)	−14.1 (7.1)^	0.5	−13.6 (9.1)	0.4
General psychological distress	−0.4 (0.2)*	−0.2 (0.3)	−0.6 (0.4)	−0.4 (0.4)	0.2	−0.2 (0.5)	0.1
Limited activity days	−0.3 (0.1)**	0.2 (0.4)	−0.1 (0.5)	−0.9 (0.2)***	1.3	−1.3 (0.2)***	1.2

Note. HLM was used for all outcomes except limited activity days used HGLM with a negative binomial distribution. Models that included significant covariates are indicated by superscripts. Covariates were coded as follows: racial/ethnic minority (0 = non-Latinx White, 1 = racial/ethnic minority), sexual minority (0 = heterosexual, 1 = lesbian/gay/bisexual), sex (0 = male, 1 = female). Hedge’s g effect sizes are model-based estimates of between-group differences in the rate of change across time. DBT PE = Dialectical Behavior Therapy Prolonged Exposure protocol. PTSD = posttraumatic stress disorder.

^{^}p = .05

^*p < .05.

^**p < .01.

^***p < .001.

^aIncludes racial/ethnic minority (B = −6.1, SE = 2.9, p < .05), time × racial/ethnic minority (B = −10.5, SE = 4.5, p < .05), and sexual minority (B = 7.1, SE = 2.6, p < .05) as covariates.

^bIncludes time × treatment site as a covariate (F (3, 35) = 2.9, p < .05).

^cIncludes sex (B = 44.6, SE = 16.3, p < .05) as a covariate.

^dIncludes sexual minority (B = 12.1, SE = 5.8, p < .05), sex (B = 17.1, SE = 8.0, p < .05), and time ×racial/ethnic minority (B = −15.3, SE = 7.2, p < .05) as covariates.