. 2007 Mar 28;32(4):488–506. doi: 10.1007/s10608-006-9089-7

Table 4.

Regression analyses: predicting concurrent and subsequent PTSD severity by self-reported rumination and concreteness at 2 weeks

	Study 1		Study 2
	PDS scores		PDS at 2 weeks		PDS at 1 month		PDS at 3 months		PDS at 6 months
	β	ΔR²	β	ΔR²	β	ΔR²	β	ΔR²	β	Δ R²
Step 1		.47**		.43**		.29**		.29**		.28**
Trauma-related rumination (RIQ)	.68**		.65**		.54**		.54**		.53**
Step 2		.03*		.01		.03*		.04*		.01
Trauma-related rumination (RIQ)	.71**		.65**		.53**		.53**		.53**
Concreteness ratings	−.18*		.11		−.17*		−.19*		−.12
Step 3		.01		.00		.00		.00		.03*
Trauma-related rumination (RIQ)	.76**		.65**		.53**		.53**		.53**
Concreteness ratings	−.17*		−.13		−.18*		−.20*		−.15
Interaction	−.13		.04		−.02		−.03		−.17*

PDS Posttraumatic Diagnostic Scale, RIQ trauma-related rumination, as assessed with the Responses to Intrusions Questionnaire

*P < .05

**P < .001