Table 6.

Simple contrasts between PTSD diagnostic groups in terms of percentage of substance positive urine screens during aftercare.

Reference Group	Contrast Group	Raw Mean1(SD)	Raw Mean2(SD)	Conest	SE	p	d
6 Months:
No PTSD diagnosis	PTSD meeting full criteria	.53 (.38)	.72 (.33)	.27	.32	.40	.31
No PTSD diagnosis	PTSD, partial remission	.53 (.38)	.66 (.32)	.10	.29	.74	.11
No PTSD diagnosis	PTSD, full remission	.53 (.38)	.31 (.35)	−.65	.26	.013*	.76
No PTSD or PTSD not in full remission	Improved to full remission	.55 (.37)	.19 (.33)	−1.05	.33	<.01*	1.23
No PTSD or PTSD not in full remission	Remained fully remitted	.55 (.37)	.47 (.36)	−.16	.39	.69	.28
12 Months:
No PTSD diagnosis	PTSD meeting full criteria	.55 (.39)	.73 (.37)	−.17	.41	.68	.19
No PTSD diagnosis	PTSD, partial remission	.55 (.39)	.75 (.33)	.06	.41	.88	.07
No PTSD diagnosis	PTSD, full remission	.55 (.39)	.31 (.37)	−.74	.22	< .01*	.84
No PTSD or PTSD not in full remission	New diagnosis in full remission	.57 (.39)	.05 (.10)	−1.39	.44	<.01*	1.61
No PTSD or PTSD not in full remission	Improved to full remission	.57 (.39)	.58 (.34)	−.09	.40	.83	.10
No PTSD or PTSD not in full remission	Remained fully remitted	.57 (.39)	.19 (.29)	−1.01	.30	<.01*	1.18

^*p < Bonferroni corrected α

Note. Effect sizes were derived from Rosnow, Rosenthal, & Rubin’s (2000) formula for calculating Cohen’s d (Cohen, 1988) from the t-statistic when contrasted groups are unequal in sample size.