Table 2.

Demographic and clinical information of the studied groups is shown in the top table.

Group	CN	EMCI	LMCI	AD	p	F
Demographic and clinical information
Number	23	23	23	23	-	-
Male, female	8,15	12,11	10,13	11,12	.673	-
Age (mean ± SD)	$75.82\pm 9.44$	$75.29\pm 6.36$	$72.26\pm 7.05$	$77.75\pm 3.75$	.396	1.00
MMSE (mean ± SD)	$28.96\pm 1.17$	$28.32\pm 1.89$	$25.87\pm 3.86$	$20.32\pm 4.26$	< 0.001	33.16
GDSCALE (mean ± SD)	$1.04\pm 1.41$	$1.80\pm 1.85$	$1.94\pm 2.29$	$1.37\pm 1.32$	.588	0.65
Global CDR (mean ± SD)	$0.40\pm 0.13$	$0.39\pm 0.24$	$0.49\pm 0.25$	$0.96\pm 0.40$	< 0.001	46.41
FAQ (mean ± SD)	$0.25\pm 1.22$	$2.77\pm 4.22$	$5.06\pm 6.68$	$18.26\pm 7.87$	< 0.001	46.61
NPI-Q (mean ± SD)	$0.67\pm 1.54$	$2.47\pm 2.52$	$2.08\pm 1.98$	$4.85\pm 3.78$	.002	5.41

Pairwise comparison	CN-AD	EMCI-AD	LMCI-AD	CN-EMCI	CN-LMCI	EMCI-LMCI
The pairwise t-test comparison
Age	0.932	0.539	0.202	0.878	0.512	0.919
MMSE	< 0.001	< 0.001	< 0.001	0.880	0.047	0.233
GDSCALE	0.817	0.961	0.982	0.523	0.596	0.999
Global CDR	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	0.515
FAQ	< 0.001	< 0.001	< 0.001	0.582	0.060	0.581
NPI-Q	0.429	0.633	< 0.001	0.987	0.067	0.029

The pairwise t-test comparisons of the clinical information are presented in the bottom table.