Table 2. Breakdown of subjects by diagnosis and APOE epsilon 2 status.

	ε2 = 0	ε2 = 1	ε2 = 2	total
CN	170	26	2	198
MCI	307	14	0	321
AD	139	4	0	143
total	616	44	2	662

CN = cognitively normal, MCI = mild cognitive Impairment, AD = Alzheimer’s Disease, ε2 = APOE epsilon 2.