Table 2. Results from regression analyses investigating relationship between deployment experiences and gray matter volume.

Structure	Side	BA	Grey Matter/Voxel	Volume (µL)	Coordinates			t	coeff
Term: Combat Experiences. Polarity Positive
No Clusters found
Term: Combat Experiences. Polarity Negative
Orbital Frontal Gyrus	R	11	0.47±0.12 [0.29–0.81]	656	6	49	−20	−3.73	−0.069
Term: Deployment Social Support. Polarity Positive
Inferior Occipital Gyrus	R	19	0.56±0.17 [0.25–1.15]	400	46	−81	−2	3.61	0.020
Term: Deployment Social Support. Polarity Negative
Orbital Frontal Gyrus	R	10	0.45±0.08 [0.30–0.70]	496	6	54	−9	−3.69	−0.015
Cerebellum	L		0.80±0.25 [0.42–1.27]	440	−33	−38	−34	−3.78	−0.030
Precuneus	L	7	0.50±0.13 [0.33–0.87]	392	−17	−76	41	−4.14	−0.020
Term: Interaction. Polarity Positive
Orbital Frontal Gyrus	R	10	0.44±0.08 [0.28–0.67]	560	6	52	−10	3.74	0.002
Precuneus	L	7	0.50±0.13 [0.33–0.86]	384	−17	−75	41	3.74	0.002
Term: Interaction. Polarity Negative
Middle Temporal Gyrus	R	21	0.48±0.13 [0.30–0.89]	376	48	−15	−13	−3.57	−0.002

Note: Gray matter volume determined using FSL implementation of voxel-based morphometry. Average t statistics and unstandardized regression coefficients were extracted for significant clusters of activation. Deployment experiences included scores on the combat experiences and deployment social support subscales of the Deployment Risk and Resilience Inventory. Analyses were partial regressions investigating main and interaction effects of each predictor with N = 32 combat veterans from Operation Iraqi Freedom or Operation Enduring Freedom (OIF/OEF).