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. Author manuscript; available in PMC: 2017 Jun 5.
Published in final edited form as: Neurotoxicology. 2016 Feb 23;53:246–256. doi: 10.1016/j.neuro.2016.02.009

Fig. 1.

Fig. 1

Adjusted total cortical (A), frontal (B), parietal (C), and occipital (D) lobe gray matter (GM) volume plotted as a function of the self-reported frequencies of hearing chemical alarms sound in theater. The y-axis represents the unstandardized residuals that resulted from regressing the regional brain volumes (dependent variables) on age, sex intracranial volume, Kansas-GWI status, predicted Khamasiyah exposure, current PTSD and/or major depressive disorder, current use of psychotropic medication, history of alcohol and/or substance abuse/dependence (independent variables). The square represents the mean value of the unstandardized residuals and the error bars represent the 95% confidence interval.