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. Author manuscript; available in PMC: 2012 Oct 28.
Published in final edited form as: J Clin Exp Neuropsychol. 2007 Oct;29(7):752–767. doi: 10.1080/13825580601025908

TABLE 2.

Descriptive information for participant groups

Characteristic HC (n=39) CC (n=35) MCI (n=34) AD (n=26) p
Agea 71.7 (5.1) 73.9 (6.3) 73.8 (6.3) 76.6 (6.8) .02h
Educationa 16.8 (2.6) 16.4 (3.0) 16.4 (3.0) 15.4 (3.1) ns
Gender (M, F) 12, 27 11, 24 16, 18 14, 12 ns
ApoE ε 4 (−,+)b 19, 19 26, 9 15, 17 6, 6 ns
CCI c 7.1 (5.5) 24.4 (9.4) 30.4 (12.0) 37.6 (10.5) .000i
DRS-2d 141.7 (1.7) 141.2 (2.0) 137.6 (4.1) 123.0 (13.2) .000j
MMSEe 29.0 (1.1) 28.8 (1.3) 26.8 (1.5) 22.9 (4.7) .000j
CVLT4
 Learning 50.8 (7.8) 46.3 (8.6) 34.2 (6.5) 23.2 (7.7) .000j
 Delay 11.97 (2.4) 11.1 (2.9) 8.0 (2.9) 4.7 (3.5) .000j
GDSg 1.3 (2.0) 4.2 (4.0) 3.0 (2.8) 4.4 (4.3) .000k

Note. Data are mean (SD) except where indicated. HC: healthy control; CC: cognitive complaints; MCI: mild cognitive impairment; AD: Alzheimer’s disease.

a

In years.

b

ApoE ε 4=genotype of apolipoprotein E, ε 4−, ε 4+. Data were unavailable for 1 HC, 2 MCI, and 14 AD participants.

c

Cognitive Complaint Index: percentage of all complaint items endorsed in a positive (i.e., symptomatic) direction. See text for references for component scales. Data were unavailable for 12 AD participants.

d

Dementia Rating Scale-2, total score (n/144). Data were unavailable for 8 AD participants.

e

Mini-Mental State Examination, total score (n/30). Data were unavailable for 5 AD participants.

f

California Verbal Learning Test II, total learning score (n/80); Long Delay Free Recall (n/16). Data were unavailable for 6 AD participants.

g

Adjusted Geriatric Depression Scale (n/26 noncognitive items). Data were unavailable for 4 AD participants.

h

AD > HC.

i

CC, MCI, AD > HC.

j

HC, CC > MCI > AD.

k

HC < CC, AD.