Compared to tau PET, plasma p‐tau217 was more strongly associated with APOE ɛ4 carriership, amyloid PET and the CSF Aβ42/40 ratio, while tau PET was more strongly associated with cognitive decline and MRI‐based atrophy compared to plasma p‐tau217 (Fig 5B). This evidence concerns the gene APOE and Atrophy.