Dresden PTSD treatment study: randomized controlled trial of motor vehicle accident survivors

BMC Psychiatry

Table 4 Psychological test results for all groups at pre-treatment, post-treatment and 3-months follow up

Measure		Groups		Group × Pre-Post F value, effect size	ANCOVA post tests between groups with pretests as covariates/effect size
	Time	CBT	Wait List
IESR-Intrusion	Pre	21.7^a	20.0^a	F = 28.5, p < 0.001	F = 28.8, p < 0.001,
	Post	7.6^b	17.6^a	d = 1.89	d = 1.74
	FU	8.8^b	-
IESR-Avoidance	Pre	19.0^a	16.5^a	F = 10.7, p < 0.01	F = 10.4, p < 0.01
	Post	10.7^a	16.6^a	d = 1.16	d = 1.05
	FU	8.8^a	-
IESR-Hyperarousal	Pre	20.1^a	20.7^a	F = 11.9 p < 0.001	F = 8.9, p < 0.01
	Post	9.6^b	16.6^a	d = 1.22	d = 0.97
	FU	9.2^b	-
BDI	Pre	17.9^a	16.0^a	F = 4.9 p < 0.05	F = 6.6, p = 0.14
	Post	9.1^b	12.6^a	d = 0.78	d = 0.83
	FU	10.0^b	-
STAI	Pre	50.5^a	49.1^a	F = 6.4 p < 0.01	F = 6.5, p < 0.01
	Post	40.9^a	46.2^a	d = 0.89	d = 0.83
	FU	41.9^a	-
PTCI	Pre	123.3^a	107.9^a	F = 20.2 p < 0.001	F = 16.7, p < 0.001
	Post	86.1^b	100.25^a	d = 1.59	d = 1.33
	FU	92.5^b	-

^{a, b, c} Means within a column which share a superscript do not differ at p = 0.05

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