APOE and Schnyder corneal dystrophy: APOE4 (OR = 3.07 [1.33–7.07], punc < 0.01) was associated with CSF-amyloid in SCD, while it was only predictive for PET-amyloid in MCI (OR = 9.44 [2.93, 30.39], pFDR < 0.01).