Table I.

Characteristics of ADNI Florbetapir Study Sample

	N	EMCI	LMCI	AD
Sample Size (n)	194	212	132	64
Age (mean/sd)	77.0(6.1)	71.3(7.5)	75.8(7.9)	75.8(8.4)
Age range (yrs)	64–94	55–89	55–92	56–90
Education years (mean/sd)	16.3(2.8)	15.9(2.6)	16.1(2.8)	16.2(2.8)
PET Global SUVR (means/sd)	1.10(0.2)	1.15(0.2)	1.23(0.2)	1.34(0.3)
PET Cingulate SUVR (means/sd)	1.18(0.2)	1.25(0.2)	1.32(0.3)	1.43(0.3)
PET Frontal SUVR (means/sd)	1.08(0.2)	1.15(0.2)	1.23(0.2)	1.35(0.3)
PET Parietal SUVR (means/sd)	1.10(0.2)	1.15(0.2)	1.23(0.2)	1.35(0.3)
PET Temporal SUVR (means/sd)	1.03(0.2)	1.07(0.2)	1.15(0.2)	1.25(0.2)
Gender ratio (M/F)	1.00	1.30	1.59	1.56
APOE ε4 status (ε4−/ε4+)*	146/44	121/83	71/58	22/41

^*APOE data missing for 16 subjects (4 N, 8 EMCI, 3 MCI, 1 AD); they were omitted from genetic analysis.