Fig. 2.

Correlation between residualized value of cortisol controlling for age, sex, education, and residualized value of brain volumes controlling for age, sex, education, body mass index, and total intracranial volume. In the post-traumatic stress disorder (PTSD) group, the cortisol level significantly negatively correlated with (A) the left thalamus proper, (B) right thalamus proper, and (C) right frontal pole volumes, respectively. In the healthy group (HC), all correlations were not significant. All pvalues were adjusted using bootstrapping. Images of the brain were acquired using the Brainstorm toolbox.