Table 1.

Selected demographic and clinical characteristics of ADNI participants at the time of PET scan

	HC (n=179)	EMCI (n=190)	LMCI (n=115)	AD (n=71)
Age (years)	76.68 (6.25)	71.04 (7.41)	75.61 (8.14)	75.87 (8.15)
Women	87 (49%)	83 (44%)	41 (36%)	27 (38%)
Education (years)	16.27 (2.72)	15.89 (2.65)	16.11 (2.90)	16.04 (2.87)
APOE ε4 allele present	41 (23%)	77 (41%)	49 (43%)	45 (64%)
CDR-SOB	0.07 (0.29)	1.22 (0.73)	1.73 (1.18)	5.63 (2.70)
Mini Mental Status Examination	29.07 (1.25)	28.39 (1.52)	27.74 (1.84)	21.68 (4.24)
Logical memory immediate recall (WMS-R)	14.94 (3.36)	10.93 (2.81)	8.74 (4.35)	4.20 (3.10)
Logical memory delayed recall (WMS-R)	14.08 (3.64)	8.87 (1.73)	6.13 (4.38)	1.67 (2.50)

Data are number (%) or mean (SD).

CDR-SOB = Clinical Dementia Rating-Sum of Boxes; WMS-R = Wechsler Memory Scale-Revised.