Table 1.

Hierarchical linear regression model predicting PTSD symptoms in a sample of male police officers (n = 212)

Level/Variables	Coefficient (SE*)	p-value	Accumulated R2
Step 1
NA	1.09 (0.11)	< 0.001
Job duration**	4.43 (1.51)	0.004	0.38
Step 2
CIHQ**	1.23 (0.72)	0.09	0.45
Step 3
Interaction	0.03 (0.01)	0.01	0.55
NA ×PDEQ
Step 4
Social support	−0.16 (0.07)	0.03	0.55

NA: negative affect; CIHQ: Critical Incident History Questionnaire; PDEQ: Peritraumatic Dissociative Experiences Questionnaire.

^*SE: standard error;

^**log transformed.