Table 1.

Demographics of participants.

	Development dataset				Test dataset				p-value†
	Total	CU	DAT	p-value	Total	CU	DAT	p-value
	N = 924	N = 478	N = 446		N = 196	N = 113	N = 83
Age, years	69.2 ± 10.8	68.3 ± 11.6	70.3 ± 9.8	0.087	67.9 ± 11.3	67.9 ± 11.1	67.9 ± 11.7	0.640	0.086
Female, N (%)	542 (58.7)	282 (59.0)	262 (58.7)	1.000	115 (58.7)	71 (62.3)	44 (52.4)	0.218	1.000
Education, years	11.6 ± 4.7	12.0 ± 4.6	11.2 ± 4.8	0.004	12.1 ± 5.1	12.1 ± 4.9	12.2 ± 5.4	0.634	0.098
APOE ε4 carriers, N (%)	357 (39.7)	121 (25.3)	236 (52.9)	<0.001	60 (31.4)	28 (24.6)	32 (38.1)	0.014	1.000
MMSE	23.8 ± 6.1	28.1 ± 1.9	19.1 ± 5.6	<0.001	24.2 ± 5.9	28.1 ± 2.1	18.9 ± 5.3	<0.001	0.338

The values are expressed as mean ± standard deviation or number (percentage).CU, cognitively unimpaired; DAT, dementia of Alzheimer’s type; SD, standard deviation; APOE ε4, apolipoprotein E ε4; MMSE, Mini-Mental State Exam. †Comparisons between development and test dataset.