Table 1. Sample Demographics.

Demographics with the cognitively healthy patients matched 1:1

	Cn €4 - n = 56	Cn €4 + n = 56
No. females (%)	21 (38)	21 (38)
No. of APOE €4 carrier (%)
No. with 2/2 (%)	1 (2)	0
No. with 2/3 (%)	5 (9)	0
No. with 3/3 (%)	50 (89)	0
No. with 2/4 (%)	0	1 (2)
No. with 3/4 (%)	0	51 (91)
No. with 4/4 (%)	0	4 (7)
Median age, yr. (min, max)	79 (64, 91)	78 (63, 90)
Median education, yr. (min, max)	14 (8, 20)	13 (8, 20)
Median Short Test score (min, max)*	36 (30, 38)	35 (29, 38)
Median CDR sum of boxes (min, max)	0.0	0.0

^*p < .008