Table 1. Breakdown of subjects by diagnosis and APOE epsilon 4 status.

	ε4 = 0	ε4 = 1	ε4 = 2	total
CN	143	50	5	198
MCI	153	127	41	321
AD	50	62	31	143
Total	346	239	77	662

CN = cognitively normal, MCI = mild cognitive Impairment, AD = Alzheimer’s Disease, ε4 = APOE epsilon 4.