Table 3.

Relationships between self-reported frequencies of hearing chemical alarms to measures of cortical volume reported as B (SE).

Unstandardized coefficients B(SE)	Frontal GM	Parietal GM	Temporal GM	Occipital GM
Intercept	45,930 (14,120)	41,254 (12,157)	34,496 (10,770)	15,549 (6564)
Hearing chemical alarms	−2914 (1182)	−2558 (995)	−852 (873)	−1846 (520)
Age	−551 (134)	−428 (113)	−355 (101)	−186 (61)
Male sex	−7764 (3274)	−2392 (2812)	1425 (2521)	−2110 (1530)
ICV	0.099 (0.008)	0.072 (0.007)	0.056 (0.006)	0.028 (0.004)
KS-GWI	2062 (24,316)	2265 (1951)	1758 (1745)	1268 (1073)
2000 Khamisiyah plume exposure	−3217 (2142)	−3090 (1814)	−1744 (1615)	−1381 (1005)
Current MDD	2449 (3432)	693 (2993)	−814 (2645)	−1436 (1566)
Current PTSD	−4882 (3543)	−6578 (3079)	−4069 (2728)	−860 (1571)
Current psychotropic medication use	−1108 (2805)	−301 (2464)	−2238 (2159)	724 (1372)
Past ETOH abuse/dependence	3031 (2547)	2753 (2186)	964 (1959)	958 (1127)
Past substance abuse/dependence	2868 (3943)	3273 (3561)	1763 (3026)	1234 (1724)

Bold: adjusted p < 0.04.

GM, gray matter; ICV, intracranial volume; GWI, Gulf War Illness; MDD, Major Depressive Disorder; PTSD, Posttraumatic Stress Disorder; ETOH, alcohol.