Table II.

Total brain volume, hippocampal and amygdala volumes (cm³) as well as partial hippocampal volumes for the entire sample, small, and large hippocampal volume group

	Total sample (N = 58)		sHCV group (N = 29)		lHCV group (N = 29)		Inferential statistics sHCV vs. lHCV
	M	SD	M	SD	M	SD
TBV	1215.64	101.62	1186.24	110.85	1248.83	81.47	t(1,56) = −2.45, P < 0.05
Raw Volumes
HC, right	2.73	0.27	2.52	0.15	2.95	0.18	t(1,56) = −10.11, P < 0.001
HC, left	2.61	0.29	2.41	0.20	2.82	0.22	t(1,56) = −7.29, P < 0.001
HC, total	5.35	0.51	4.93	0.27	5.77	0.33	t(1,56) = −10.65, P < 0.001
Amygdala, righta	1.75	0.18	1.68	0.17	1.83	0.16	t(1,52) = −3.32, P < 0.005
Amygdala, left	1.69	0.19	1.60	0.17	1.77	0.18	t(1,52) = −3.39, P < 0.005
Amygdala, total	3.44	0.33	3.28	0.31	3.59	0.28	t(1,52) = −3.84, P < 0.005
Partial Volumes
Anterior HC, right	1.28	0.30	1.13	0.28	1.43	0.25	t(1,56) = −4.32, P < 0.001
Anterior HC, left	1.22	0.26	1.11	0.22	1.33	0.25	t(1,56) = −3.38, P < 0.005
Posterior HC, right	1.46	0.27	1.39	0.28	1.53	0.26	t(1,56) = −1.92, P = 0.06
Posterior HC, left	1.39	0.29	1.30	0.28	1.49	0.29	t(1,56) = −2.57, P < 0.05

TBV, total brain volume; sHCV, relatively smallest hippocampal volume; lHCV, relatively largest hippocampal volume; HC, Hippocampus.

^aAmygdala volumes were assessed for 54 participants only, 27 in each group.