. Author manuscript; available in PMC: 2011 Dec 8.

Published in final edited form as: Depress Anxiety. 2009;26(8):724–731. doi: 10.1002/da.20588

TABLE 2.

Single degree of freedom contrasts for intent-to-treat analyses for PTSD severity (PSS-I)

	Parameter value	SE	95% lower CI	95% upper CI	t	P	Partial η²
1. Pre–post for SER	1.64	4.46	–7.51	10.80	0.37	.72	.01
2. Pre–post for PE	15.96	2.69	10.44	21.48	5.93	<.001	.57
3. Pre-FU for SER	7.20	5.19	–3.44	17.85	1.39	.18	.07
4. Pre-FU for PE	17.02	3.13	10.61	23.44	5.44	<.001	.52
5. IC1: Pre, Post by SER, PE	–14.32	5.21	–25.01	–3.63	2.75	.01	.22
6. IC2: Pre, FU by SER, PE	–9.82	6.06	–22.25	2.61	1.62	.12	.09

Note: Pre, pretreatment; post, immediate post-treatment; FU, last available follow-up; SER, sertraline; PE, prolonged exposure; CI, confidence interval; IC, interaction contrast. All analyses are based on adjusted means using propensity scores and do not reflect raw mean changes.