Table 3.

Stepwise regression analysis of (A) re-experiencing symptoms, and (B) hyper-arousal symptoms of PTSD

(A) Outcome: Re-Experiencing PTSD symptoms	R2	R2 change	F change	P
Predictors
1. Age, sex, and race	.010	.014	0.50	ns
2. Childhood and adult trauma	.130	.116	6.67	.002***
3. Startle to danger cue	.186	.056	6.76	.01**
4. SCR to danger cue	.189	.003	0.39	ns
Final model: F(7, 105) = 3.27, P = .004	β	Part r	P
Age	.01	.01	ns
Sex	−.04	−.04	ns
Race	.06	.05	ns
Childhood trauma	.38	.35	<.001
Adult trauma	−.05	−.04	ns
Startle to danger cue	.26	.24	.01
SCR to danger cue	−.06	−.06	ns
(B) Outcome: Hyper-arousal PTSD symptoms	R2	R2 change	F change	P
Predictors
1. Age, sex, and race	.003	.003	0.11	ns
2. Childhood and adult trauma	.134	.131	7.56	.001***
3. Startle to safety cue	.191	.057	7.00	.009**
4. SCR to safety cue	.194	.003	0.32	ns
Final model: F(7, 105) = 3.37, P = .003	β	part r	P
Age	.03	.03	ns
Sex	−.17	−.15	ns
Race	.07	.07	ns
Childhood trauma	.39	.36	<.001
Adult trauma	−.09	−.08	ns
Startle to safety cue	.25	.24	.01
SCR to safety cue	−.06	−.05	ns