Table 3. Demographic and cognitive summary by ε4.

	Parameter	ε 4 = 0	ε4 = 1	ε4 = 2
CN	n =	143	50	5
n = 198	Age	76.2±0.4	75.7±0.7	74.6±2.3
	Years of Ed.	16.1±0.2	16.1±0.4	16.2±1.2
	MMSE	29.1±0.1	29.3±0.1	29.0±0.4
	Gender (m/f)	78/65	26/24	3/2
	Race (Asian/Black/White)	1/9/133	0/3/47	1/0/4
MCI	n =	153	127	41
n = 321	Age	75.9±0.6	74.6±0.6	71.7±1.1
	Years of Ed.	15.8±0.2	15.6±0.3	15.7±0.5
	MMSE	27.2±0.1	27.0±0.2	26.7±0.3
	Gender (m/f)	98/55	81/46	24/17
	Race (Asian/Black/White)	6/4/143	3/6/118	0/1/40
AD	n =	50	62	31
n = 143	Age	76.3±1.0	75.9±0.9	71.7±1.3
	Years of Ed.	15.4±0.4	14.5±0.4	14.4±0.6
	MMSE	23.4±0.3	23.5±0.2	23.5±0.4
	Gender (m/f)	24/26	33/29	18/13
	Race (Asian/Black/White)	2/1/47	0/3/59	0/1/30

All means are reported ± 1 standard error. All bolded parameters were significant according to ANOVA, Chi-square analysis, or Fisher’s Exact Test as appropriate. CN = cognitively normal, MCI = mild cognitive Impairment, AD = Alzheimer’s Disease, ε4 = APOE epsilon 4.