Table 6.

Bivariate heritability estimates between TBV and subregions (left and right hippocampal subfield volumes and whole hippocampal volumes) with 95% confidence intervals (sample size N = 465)

	TBV		Subregion		Shared (TBV and subregion)
Region	H 2 (%)	95% confidence interval	H 2 (%)	95% confidence interval	H 2 (%)	95% confidence interval
Left CA1	95	87–97	77	62–86	96	84–100
Right CA1	96	86–97	76	62–86	97	87–100
Left CA2CA3	95	84–97	52	24–68	99	80–100
Right CA2CA3	95	85–97	75	56–84	95	82–100
Left CA4DG	95	87–97	79	63–88	95	83–100
Right CA4DG	96	86–97	85	73–91	97	87–100
Left SRLM	95	86–97	70	53–81	95	81–100
Right SRLM	96	86–97	79	65–87	98	87–100
Left subiculum	93	82–97	62	29–82	86	63–100
Right subiculum	95	85–97	88	75–92	99	86–100
Left hippocampus	95	87–97	83	70–90	96	85–99
Right hippocampus	96	86–97	84	73–91	98	89–100

All values were significant at P < 0.001, when ACE model is compared to CE model.