Table 2.

Threshold and threshold difference (threshold after deployment minus threshold before deployment) per item of the Posttraumatic Symptom Scale—Self Report (PSS).

THRESHOLD
Item	Sample 1			Sample 2
	Pre	Post	Diff	Pre	Post	Diff
1. Recurrent and intrusive distressing recollections of the event	0.221	1.411	1.190*	0.895	0.908	0.049
2. Recurrent distressing dreams of the event	1.440	1.130	−0.310*	1.462	0.990	−0.472*
3. Acting or feeling as if the event were recurring	1.054	1.306	0.252	1.005	0.940	−0.065
4. Intense psychological distress at exposure to cues of event	1.036	1.569	0.533*	1.820	1.060	−0.760*
5. Physiological reactivity on exposure to cues of event	1.258	1.643	0.385*	1.264	1.135	−0.129
6. Avoidance of thoughts, feelings, or conversations associated with event	0.623	1.836	1.213*	1.435	0.762	−0.673*
7. Avoidance of activities, places, or people associated with event	1.036	1.647	0.611*	1.345	1.415	0.070
8. Inability to recall an important aspect of event	0.919	1.356	0.437*	1.191	1.197	0.006
9. Diminished interest or participation in significant activities	0.801	1.021	0.220	1.209	0.668	−0.541*
10. Feeling of detachment or estrangement from others	0.987	1.216	0.229	1.191	0.776	−0.415*
11. Restricted range of affect	1.113	0.890	−0.223*	0.869	0.630	−0.239*
12. Sense of a foreshortened future	1.019	1.359	0.340*	1.017	1.385	0.368*
13. Difficulty falling or staying asleep	0.921	0.830	−0.091	0.820	0.665	−0.155
14. Irritability or outbursts of anger	0.258	0.221	−0.037	0.856	0.273	−0.583*
15. Difficulty concentrating	0.552	0.745	0.193	0.650	0.655	0.005
16. Hypervigilance	0.830	0.330	−0.500*	1.245	−0.166	−0.411*
17. Exaggerated startle response	1.608	0.704	−0.904*	0.694	0.484	−0.210

^*p < 0.05.