Table 1. Demographic information and clinical measures of the NC, aMCI, and AD groups.

	NC	aMCI	AD	P values
Number of subjects	21	18	35
Gender(males/females)	7/14	10/8	17/18	0.348
Age (years)	65.0±8.1	70.2±7.9	65.8±8.3	<0.001
Years of education	11.0±4.4	9.4±4.8	10.6±4.2	0.030
MMSE	28.5±1.4	21.9±5.0	10.1±6.7	<0.001
CDR	0	0.5	1.63±0.69

Data are shown as the means ± the standard deviations. The P values refer to analysis of variance or chi square tests. Abbreviations: AD, Alzheimer’s disease; aMCI, amnestic mild cognitive impairment; CDR, Clinical Dementia Rating; MMSE, Mini-Mental State Examination; NC, normal control.