Table 1.

ADNI demographics of participants contributing amyloid PET data and those contributing longitudinal MRI data

	Florbetapir (n = 980)	Longitudinal MRI (n = 607)
Age at baseline ± SD	73.92 (7.52)	75.48 (6.76)
Education in years ± SD	16·26 (2.71)	15.68 (2.93)
Sex (% female)	540 (55.10)	248 (41.36)
APOE ɛ4 carriers (%)	431 (43.98)	309 (51.41)
Diagnosis (CN/MCI/AD dementia)	323/481/176	117/297/133
PHS ± SD	0.31 (0.76)	0.50 (0.86)

AD = Alzheimer’s disease; CN = cognitively normal; MCI = mild cognitive impairment.