Table 1.

Subject characteristics

Characteristic (mean ± SD)	APOE-4 NC	APOE-4	P	APOE-4 NC partial correlation with age	APOE-4 partial correlation with age
Age, y	63.8 ± 8.3	60.8 ± 9.7	0.22
Age range	45–76	43–78
No. (males/females)	30 (10/20)	25 (12/13)
Education, y	16.7 ± 1.8	17.5 ± 3.3	0.33
Family history, yes/no	21/9	16/9
MMSE, score range 0–30	29.4 ± 0.9	28.6 ± 1.2	0.01*	r = −0.41, P = 0.07	r = −0.14, P = 0.55
WMS LM delay, 0–50	29.1 ± 7.1	27.1 ± 9.2	0.45	r = −0.09, P = 0.66	r = −0.45, P = 0.038*
Buschke CLTR, 0–144	56.7 ± 39.7	57.8 ± 34.2	0.92	r = −0.16, P = 0.44	r = −0.36, P = 0.1
Rey-O delay, 0–36	12.9 ± 7.2	13.8 ± 7.1	0.68	r = −0.03, P = 0.87	r = −0.57, P = 0.005*
WMS VP, 0–32	22.3 ± 7.4	20.6 ± 8.2	0.49	r = −0.17, P = 0.38	r = 0.05, P = 0.8
WAIS digit span	17.7 ± 3.6	18.1 ± 3.1	0.65	r = 0.21, P = 0.29	r = 0.1, P = 0.65

Partial correlations with age were controlled for sex, years of education, and family history of dementia. Buschke CLTR, Buschke–Fuld selective reminding test, consistent long-term retrieval section; MMSE, mini-mental state examination; NC, noncarriers; Rey-O delay, Rey–Osterrith Complex Figure, delayed recall; WAIS digit span, Wechsler Adult Intelligence Scale 3, digit span; WMS LM delay, Wechsler memory scale, logical memory delayed recall portion; WMS VP, Wechsler memory scale, verbal paired associations II. *P < 0.05.