Table 3 Association between EC values, PTSD status and WTC exposure duration.

Parahippocampal Gyrus (anterior,right)				Amygdala (left)
Predictors	Estimates	CI	p	Predictors	Estimates	CI	p
Intercept	0.084	0.082–0.087	<0.001	Intercept	0.086	0.084–0.088	<0.001
Months on site	0.000	0–0.001	0.099	Months on site	0.000	0–0.001	0.492
Psychotropic	–0.002	0.005–0.002	0.307	Psychotropic	–0.002	0.005–0.000	0.063
Opioid	–0.002	0.008–0.005	0.576	Opioid	–0.008	0.014–0.003	0.001
MDD	–0.002	0.005–0.002	0.367	MDD	0.002	0.001–0.005	0.109
PTSD	0.007	0.003–0.011	<0.001	PTSD	0.005	0.002–0.008	0.001
Months on site*PTSD	–0.001	0.002–0.000	0.01	Months on site*PTSD	–0.001	0.001–0.000	0.005
Observations	86				86
R2	0.162				0.332

Generalized linear regression models (GLM) examining WTC exposure duration (i.e., months on site) moderates the association between PTSD (WTC-PTSD versus non-PTSD) and EC values controlling for major depressive disorder (MDD) and medication use (psychotropic and opioid) on eigenvector centrality (EC) value of a single brain area (defined using the Harvard-Oxford atlas). P values are adjusted for multiple comparisons.

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