Table 4.

Descriptive analyses for SUD for intent to treat sample (N = 34) (estimated values)

Variable (primary outcome measures)	TAU + SWT (A) (N = 19)			TAU (B) (N = 15)			GLM	Partial η2	Contrast	Partial η2	GLM	Partial η2	GLM	partial η2
	pre	post	fu	pre	post	fu	Time	Time	1 pre-post	1 pre-post	condition	condition	Time * condition	Time * condition
									2 post-fu	2 post-fu
TLFB M (SD) Number of abstinent days	19.9 (29.3)	76.8 (15.5)	61.0 (30.8)	20.1 (25.4)	66.0 (30.3)	58.6 (38.4)	A + B **	0.570	1 A * B *	A 0.784 B 0.668	ns	0.011	ns	0.15
									2 A * B ns	A 0.292 B 0.052
							McN χ2	OR 5			Fisher	φ
SCID n (%) Primary SUD diagnosis													-	-
In remission 6	1 (5.3)	16.6 (87.4)	-	3 (20.0)	10.2 (68.0)	-	A **	15.6/0			ns	−0.244	-	-
							B *	7
SCID n (%) 7 Total N SUD diagnoses													-	-
In remission	1 (5.3)	16.4 (86.3)	-	3 (20.0)	9.2 (61.3)	-	A **	15.4/0			ns	−0.293	-	-
							B t 8	4.9
(Single SUD diagnosis, not in remission)	9 (47.4)	2.6 (13.7)	-	6 (40.0)	5.8 (68.7)	-	-	-			-	-	-	-
(2 SUD diagnoses not in remission)	6 (31.6)	0 (0)	-	3 (20.0)	0 (0)	-	-	-			-	-	-	-
(≥ 3 SUD diagnosesnot in remission)	3 (15.8)	0 (0)	-	3 (20.0)	0 (0)	-	-	-			-	-	-	-

Note. PTSD Posttraumatic Stress Disorder, TAU Treatment as usual, SWT Structured Writing Therapy, PDS Posttraumatic Diagnostic Scale, SCID Structured Clinical Interview of DSM IV, PTSD Posttraumatic stress disorder, A = TAU + SWT. B = TAU. pre pre-treatment, mid mid-treatment, post post-treatment, Fu follow up. McN χ² = McNemars χ². OR odds ratio, Pl Con = planned contrasts * p <0.05 **p < 0.001. t trend. ns not significant, φ Phi (measure of effectsize).

⁵OR = increase of cases/ decrease of cases (Breslow & Day, 1980). OR was not calculated when the denominator equals zero.

⁶SUD has been diagnosed, however the diagnosis is partially or completely in remission during the last month.

⁷No analyses were performed for variables in parentheses taking into account small sample sizes and inflation of chance.

⁸p = 0.06.