Table 2:

CSF markers and APOE status in the MCI groups

	MCI Sample 1	MCI Sample 2	P
	N	N
Aβ42 (pathologic/not pathologic)	3/14	3/16	.89
Tau (pathologic/not pathologic)	7/10	6/13	.56
Any CSF pathologic features (pathologic/not pathologic)	8/9	7/12	.55
APOE ε4 alleles (0/1/2)	8/6/4	10/6/3	.58

Note:—MCI indicates mild cognitive impairment; Aβ42, amyloid beta 42 peptide; APOE ε4, apolipoprotein E.

P denotes the P values from an independent samples t test.