Table 1.

Demographic and cognitive characteristics

	Mean (SD)	Range/%
Total Sample
N=230
Age	49.1 (17.0)	18-84
Sex	139 f / 91 m	60% f
Education	15.9 (2.5)	10-22
Subjects receiving ENC	N=208	90%
Subjects receiving SA	N=203	88%
Risk Factors Analysis	Mean	Range
N=155
Age	57.2 (8.9)	41-84
Sex	96 f / 59 m	62% f
Education	16.2 (3.9)	10-22
APOE e4+	N=52	34%
Parental FH+	N=68	44%
WRAT-III Reading SS	108.7 (7.9)
Trails A (seconds)	29.0 (10.3)
Trails B (seconds)	64.0 (22.4)
RAVL 1-5 (total)	48.9 (7.9)
RAVL T7 (words recalled)	9.6 (2.7)
Subjects receiving ENC	N=148	95%
Subjects receiving SA	N=150	97%