. Author manuscript; available in PMC: 2014 Dec 11.

Published in final edited form as: Int J Geriatr Psychiatry. 2012 Mar 1;27(10):1017–1027. doi: 10.1002/gps.2816

Table 1.

Subject demographic variables

	Diagnostic Groups
Characteristic	MCI (N = 28)	Control (N = 26)	All Subjects (N = 54)
Age — yr	68.1 ± 11.8	67.3 ± 11.7	68.2 ± 11.4
Education — yr	16.2 ± 2.9	17.7 ± 2.6	17.1 ± 3.0
Female sex — no. (%)^*	16 (57)	9 (34)	25 (46)
AD family history—no (%)	12 (43)	13 (50)	25 (46)
APOE-4 carrier— no. (%)^†	9 (36)	13 (50)	22 (43)
Mini Mental State Exam^‡	27.6 ± 1.8	29.1 ± 1.3	28.2 ± 1.7
Estimated Verbal IQ^§	110.3 ± 8.4	117.3 ± 6.1	113.6 ± 8.1
HRSD-21	1.9 ± 2.4	2.3 ± 2.4	2.2 ± 2.4

MCI = Mild Cognitive Impairment; AD = Alzheimer’s disease; APOE-4 = Apolipoprotein Epsilon-4; HRSD = Hamilton Rating Scale for Depression 21-item version.

X²(1) = 3.92, p = 0.05;

^†

APOE-4 missing for 3 MCI subjects;

^‡

t(53) = 4.4, p < 0.0001.

^§

Intelligence Quotient estimated using adult reading tests (the Wechsler Test of Adult Reading, N = 8; or the National Adult Reading Test, N = 41); t(47) = 3.32, p = .002. N = 5 missing values,