Independent and interactive effects of APOEε4 and β‐amyloid on cortical thickness in Alzheimer’s disease

The apolipoprotein (APOE) ε4 allele is a major risk factor for Alzheimer’s disease (AD) and potentiates β‐amyloid (Aβ) accumulation. Both APOEε4 and Aβ individually contribute to neurodegeneration in the aging brain. Here, we investigate the independent and interactive effects of APOEε4 and global Aβ load on cortical thickness and disease severity across the AD continuum.