Table 1.

Demographics of the whole sample and by groups

	Total	Cognitively normal		Mild Cognitive Impairment
		Aβ −	Aβ +	Aβ −	Aβ +
N	297	199	63	15	20
Age, y	73.2 (6.5)	72.5 (6.2)	74.9 (6.2)	74.9 (7.1)	73.1 (8.5)
Female, %	56.9	59.2	58.7	53.3	30.0
Education, y	15.7 (3.1)	15.5 (3.1)	16.3 (2.8)	14.7 (3.8)	16.9 (2.4)
MMSE, score 0–30	28.8 (1.4)	29.0 (1.1)	28.8 (1.0)	28.1 (1.3)	26.4 (2.1)
AMNART	120.4 (9.6)*	120.0 (9.6)	122.5 (8.4)*	117.5 (15.4)	120.1 (7.7)
GDS, score 0–14	1.2 (1.4)	1.1 (1.2)	1.0 (1.2)	3.4 (2.9)	0.8 (1.2)
Subjective, score 1–7	5.1 (1.0)	5.3 (0.9)	4.9 (0.9)	4.2 (0.9)	4.3 (0.8)
Objective, score 0–25	12.7 (4.3)	13.5 (3.5)	13.9 (3.0)	8.4 (5.5)	4.9 (4.6)

All values (except gender) represent means ± standard deviation. Abbreviations: Aβ− = amyloid negative; Aβ+ = amyloid positive; AMNART = American National Adult Reading Test; GDS = Geriatric Depression Scale; MMSE = Mini Mental State Examination; y=years.

^*missing data for one person.