Table 2.

Demographic Information and Neuropsychological Performance Scores for aMCI and CON subjects sorted by Conversion Status (CONV = Converters; NONCONV = Nonconverters)

Measure	CONV	NONCONV	t tests
Total N	17 [4/13]	75 [56/19]	ns
Age	67.4 (9.2)	70.5 (6.9)	ns
Education	15.2 (3.4)	15.7 (2.7)	ns
CERAD1
Animal Fluency	15.5 (5.1)	19.3 (5.2)	t = 2.71, p = .008
Boston Naming Test	25.7 (3.2)	26.3 (3.7)	ns
Mini-Mental State Exam	27.4 (1.8)	28.8 (1.5)	t = 3.27, p = .002
Word List Memory (WLM)2
WLM total	14.7 (4.3)	21.4 (4.5)	t = 5.18, p < .0001
WLM delayed recall	3.4 (2.0)	6.6 (2.5)	t = 4.67, p < .0001
Trail Making Test (TMT)
TMT-A	51.7 (20.3)	36.2 (14.7)	t = 3.63, p = .0005
TMT-B3,4	140.9 (75.1)	95.6 (45.6)	t = 3.15, p = .002
Digit Span Forward	8.3 (1.7)	8.7 (1.8)	ns
Digit Span Backward	5.9 (2.4)	6.7 (2.0)	ns
Clock Drawing Test	12.0 (0.9)	12.3 (0.9)	ns
Geriatric Depression Scale5	2.9 (2.7)	1.6 (1.9)	t = 2.18, p = .032
Eye tracking variables (2-min delay)
Familiarization phase
Total number of fixations	14.7 (1.9)	14.4 (2.3)	ns
Total Looking Time (secs)	3.9 (0.5)	4.0 (0.5)	ns
Test phase
% Looking Time on Novel	53.3 (7.8)	68.9 (8.6)	t = 6.82, p < .0001
Total number of fixations	13.6 (2.5)	13.6 (2.4)	ns
Total Looking Time (secs)	3.9 (0.6)	4.1 (0.5)	ns

Brackets indicate [CON/aMCI]; The mean for each variable is given with standard deviations in parentheses

¹CERAD = Consortium to Establish a Registry for Alzheimer’s disease

²WLM: 23 subjects (CONV = 2; NONCONV = 21) were not administered the WLM test

³ indicates the variances are not equal and differ significantly

⁴TMT-B: 5 subjects (CONV = 1; NONCONV = 4) did not complete the test in the allotted timeframe. Scores for these subjects are not included in the TMT-B score

⁵GDS: 4 subjects (CONV = 1; NONCONV = 3) were not administered the GDS