Table 3.

Parameter Estimates for Potentially Traumatic Event Types Model

Outcome and Predictora	B	SE	Wald’s Z	p	Relative Risk Ratio
Nightmares only
Intercept	0.08	0.18	0.45	.655	1.09
Gender	0.35	0.16	2.14	.033	1.41
Disaster	1.05	0.15	6.92	< .001	2.86
Accident/fire	1.52	0.16	9.68	< .001	4.58
Hazardous chemicals	0.61	0.21	2.86	.004	1.84
Combat exposure	1.41	0.26	5.48	< .001	4.10
Physical/sexual assault	1.96	0.16	12.29	< .001	7.10
Witnessing assault	2.42	0.17	13.86	< .001	11.21
Witnessing bodies	1.47	0.18	8.14	< .001	4.34
Friend or family member in danger	1.48	0.16	8.97	< .001	4.38
Friend or family member dying	1.28	0.16	7.91	< .001	3.61
Work-related trauma	1.34	0.21	6.26	< .001	3.83
Insomnia only
Intercept	0.31	0.12	2.66	.008	1.37
Gender	0.51	0.11	4.87	< .001	1.67
Disaster	0.97	0.10	9.44	< .001	2.63
Accident/fire	0.98	0.10	9.39	< .001	2.68
Hazardous chemicals	0.85	0.14	5.92	< .001	2.34
Combat exposure	0.95	0.20	4.84	< .001	2.59
Physical/sexual assault	1.72	0.10	16.48	< .001	5.57
Witnessing assault	1.62	0.12	13.09	< .001	5.03
Witnessing bodies	1.17	0.13	8.80	< .001	3.23
Friend or family member in danger	1.47	0.11	12.88	< .001	4.37
Friend or family member dying	1.80	0.11	16.81	< .001	6.07
Work-related trauma	0.80	0.17	4.64	< .001	2.23
Both insomnia and nightmares
Intercept	0.14	0.14	0.97	.332	1.15
Gender	0.31	0.13	2.42	.016	1.36
Disaster	1.01	0.12	8.51	< .001	2.74
Accident/fire	1.31	0.12	10.75	< .001	3.69
Hazardous chemicals	1.25	0.15	8.34	< .001	3.51
Combat exposure	0.91	0.22	4.09	< .001	2.49
Physical/sexual assault	2.40	0.13	19.12	< .001	10.98
Witnessing assault	1.87	0.14	13.56	< .001	6.47
Witnessing bodies	1.26	0.15	8.64	< .001	3.54
Friend or family member in danger	1.79	0.13	14.06	< .001	5.98
Friend or family member dying	1.81	0.13	14.30	< .001	6.12
Work-related trauma	1.01	0.18	5.60	< .001	2.76

^aThe reference group for all outcomes was “neither insomnia or nightmares.”