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Percentage of cases without cerebral amyloid angiopathy (CAA) by APOE genotype. The frequency of cases showing a lack of observed CAA pathology (CAA score of 0) in the meninges and parenchyma of the frontal, occipital, parietal, and temporal lobes for individuals with each of the more common APOE genotypes (ε2/3, ε3/3, ε3/4, and ε4/4).
