Table 1b.

Group characteristics, means and standard deviations for Study 2.

	Intact-2	MCI-2	p
	n = 186	n = 31
Age, yrs	83.5 ± 5.3	83.4 ± 5.6	0.89
Education, yrs	15.6 ± 2.5	14.8 ± 3.4	0.31
Sex, % female	77.4%	48.4%	<0.001
Race, % white, black, Asian	84.4%, 13.4%, 2.2%	64.5%, 22.6%, 12.9%	<0.01
SES	51.2 ± 10.8	46.4 ± 15.2	0.17
MMSE	28.6 ± 1.5	27.0 ± 2.0	<0.0001
CERAD Word List acquisition	20.6 ± 3.8	16.4 ± 3.9	<0.0001
CERAD Word List delayed recall	6.8 ± 1.9	4.9 ± 2.2	<0.0001

Note. SES = Socioeconomic status; MMSE = Mini-Mental State Examination; CERAD = Consortium to Establish a Registry for Alzheimer's Disease; Intact-2 = controls for Study 2; MCI-2 = mild cognitive impairment participants for Study 2