Table 1.

Whole Brain, Whole Hippocampus, and Hippocampal Subregion Mean Volume (left and right hemisphere) in Patients With PTSD and Healthy Control Subjects (N = 22 in each group)

Brain Region	PTSD, Mean ± SE	Controls, Mean ± SE	Significance
Whole brain, volume, L	1.15 ± 0.10	1.17 ± 0.12	NS
Whole hippocampus, volume, mL	3.30 ± 0.46	3.64 ± 0.41	p = .022
Hippocampal subregion, volume, mL
Subiculum	0.437 ± 0.082	0.457 ± 0.077	NS
Anterior	1.08 ± 0.22	1.13 ± 0.21	NS
Posterior	1.86 ± 0.28	2.05 ± 0.26	p = .006

Abbreviations: NS = not significant, PTSD = posttraumatic stress disorder.