Table 1.

Demographics, cognitive function and biological measures in patients defined as stable MCI and converters to AD.

	sMCI (N = 357)	cAD (N = 321)	t/$x^2$	p value	Effect size
	Mean (SD)	Mean (SD)
Demographics
Age	73.1 (7.45)	73.9 (7.11)	1.35	0.176	0.10
Gender (%F)	41.2	38.9	0.352	0.553	0.02
Cognitive function
RAVLT-Im	36.9 (10.5)	29.3 (7.7)	10.56	< 0.001	0.81
RAVLT-delay	4.88 (3.93)	2.05 (2.67)	10.87	< 0.001	0.84
RAVLT-recog	11.26 (3.16)	9.42 (3.56)	7.13	< 0.001	0.55
TMTA	39.2 (15.6)	44.7 (21.5)	3.90	< 0.001	0.30
TMTB	108.1 (56.9)	133.8 (73.9)	5.10	< 0.001	0.39
CFT animals	17.8 (5.17)	15.8 (4.75)	5.13	< 0.001	0.39
GDS: mean (SD)	1.71 (1.44)	1.65 (1.38)	0.53	0.596	0.04
ANART Total errors	12.9 (9.3)	13.3 (9.6)	0.61	0.539	0.05
Biological measures
Hippocampus volume	0.00451 (7.6$\ast {10}^{-4}$)	0.00398 (6.8$\ast {10}^{-4}$)	9.64	< 0.001	0.74
APOE (%positive)	42.3	64.2	32.45	< 0.001	0.22

sMCI stable Mild Cognitive Impairment, cAD converted to Alzheimer’s disease, RAVLT Rey Auditory Verbal Learning Test, TMT Trail Making Test, CTF Category Fluency Test, GDS Geriatric Depression Scale, ANART American National Reading Test.