Table 1.

Summary of Hierarchical Linear Modeling Analyses Predicting Associations Between Physiological Levels and Subjective Units of Distress Scale Ratings

	HR Level (n = 937)					SC Level (n = 907)
Predictors	b	SE	t	df	pr	b	SE	t	df	pr
SUDS main effects
All slides/all participantsa	0.023	0.002	11.07	934	.33***	0.004	0.001	5.98	906	.19***
Slide × SUDS interaction
Neutral/all participants	0.010	0.004	2.79	934	.09**	0.0005	0.001	0.70	906	.02
Combat/all participants	0.027	0.002	10.79	934	.33**	0.004	0.001	6.36	906	.21***
PTSD × SUDS interactionb
All slides
No PTSD	0.026	0.004	6.13	932	.19***	0.005c	0.001	3.14	902	.10*
PTSD	0.030	0.004	7.42	932	.23***	0.011d	0.001	9.15	902	.29***
PTSD Status × Slide ×
SUDS interactionb
Neutral No PTSD	0.017	0.007	2.47	932	.08*	0.002	0.002	0.94	902	.03
PTSD	0.012	0.004	2.79	932	.09*	0.001	0.001	0.57	902	.02
Combat No PTSD	0.026	0.005	5.63	932	.18***	0.001c	0.001	0.70	902	.02
PTSD	0.028	0.003	8.84	932	.28***	0.005d	0.001	5.02	902	.16***

Note. HR = heart rate; SC = skin conductance; SUDS = Subjective Units of Distress Scale. Asterisks signify statistically significant differences within groups.

^aThe variables identified in the text (i.e., major depressive disorder, substance use disorder, and antisocial personality disorder for SC level and antisocial personality disorder for HR level) were included in the main effects step.

^bWhen examining PTSD × SUDS two-way and PTSD × SUDS × Combat Slide three-way interactions main effects of major depressive disorder, substance use disorder, and antisocial personality disorder as well as interactions between these variables and SUDS were included in the model predicting SC level. For the HR level models, only antisocial personality disorder and the interaction between this variable and SUDS were included.

^cand

^dsignify statistically significant differences between groups.

^*p < .05.

^**p < .01.

^***p < .001.