Table 1

Demographic summary of donors associated with the Allen Institute’s Aging, Dementia and TBI Study

	Hippocampus		Parietal cortex		Temporal cortex
Group	Non-Dementia	Dementia	Non-Dementia	Dementia	Non-Dementia	Dementia
Sample size	29	21	27	21	28	23
Age (years)	88.2 ± 6.4	91.0 ± 6.0	88.4 ± 6.6	90.7 ± 6.1	88.2 ± 6.5	90.1 ± 5.8
Female percentage	48.3%	38.1%	51.9%	28.6%	46.4%	30.4%
APOE4 alleles	7.1%	38.9%^**	11.5%	36.8%^*	11.1%	38.1%^*

↵* p < 0.05.
↵** p < 0.01, χ² test for gender and APOE4 composition among groups. An unpaired t test was used for age analysis.