. Author manuscript; available in PMC: 2014 Feb 6.

Published in final edited form as: J Consult Clin Psychol. 2008 Apr;76(2):259–271. doi: 10.1037/0022-006X.76.2.259

Table 4.

Mediation Analysis: PTSD Symptoms (CAPS-Total) as Outcome and Trauma-Related Beliefs (PTCI) as Mediator

Variables	F	se	P
For entire study period (baseline, post-treatment, 3-, and 6-month follow- ups)^*
1. Treatment effect on mediator (PTCI)	10.19	0.10	.002
2. Treatment effect on outcome (CAPS-Total) without mediator	6.23	2.23	.01
3. Treatment effect on outcome after adding mediator^†	3.05	2.15	.08
Effect of mediator on outcome	41.75	1.21	<.001

Abbreviations: CAPS, Clinician Administered PTSD Scale; PTCI, Posttraumatic Cognitions Inventory.

Treatment effect is measured by main group effect in mean response profile model including baseline as covariate.

^†

Mediator reduced treatment effect from 10.19 to 3.05, and treatment effect became non-significant.