Table 1.

Demographics and behavioral results

	Young	PiB −	PiB +
N	26	32	8
Gender (F/M)	13/13	23/9	4/4
Age (mean years)	23.3 ± 2.5	71.8 ± 1.5	80.4 ± 1.7
Education (mean years)*	15.6 ± 0.2	15.9± 0.5	15.1 ± 1.0
MMSE (mean score)*	NA	29.3 ± 0.1	29.0 ± 0.3
AMNART (mean score)*	NA	124.7 ± 1.0	120.5 ± 3.1
BNT (mean score)*	NA	48.6 ± 2.6	48.0 ± 5.5
BVFDT (mean score)*	NA	25.6 ± 1.3	26.0 ± 3.7
Face name task accuracy*
(% Remembered HIT)	76.5 ± 3.5	66.3 ± 2.5	53.4 ±7.1
(% Forgotten HIT)	17.9 ±2.9	18.3 ± 2.2	27.7 ± 6.6
(% Remember MISS)	2.6 ± 0.7	11.5 ± 1.1	8.6 ± 2.2
(% Forgotten MISS)	2.9 ± 1.0	3.8 ±0.8	10.3 ± 3.1

Values are listed as mean and standard error. Bold text indicates statistical differences between the groups (see text for details). MMSE = Mini Mental State Examination; AMNART = American National Adult Reading Test; BNT = Boston Naming Test; BVFDT = Benton Visual Form Discrimination Test. Missing data indicated by *: 3 PiB neg and 1 Yng for Education and Benton Visual Form Discrimination test; 2 PiB neg for MMSE, AMNART and Boston Naming test; 1 PiB neg for Accuracy and Boston Naming Test.