APOE genotype and early β-amyloid accumulation in older adults without dementia

Objective:

To clarify associations between APOE ε4 allele and age on longitudinal rates of β-amyloid (Aβ) accumulation within Aβ+ and Aβ− older individuals without dementia.

Methods:

We analyzed 595 older adults without dementia classified cross-sectionally as Aβ− (n = 325) and Aβ+ (n = 270) using longitudinal florbetapir PET. The influence of age and APOE genotype on longitudinal accumulation of Aβ was examined...