APOE and Alzheimer disease: Data extracted from the ADNI database (n=310):[1] 69 subjects with mild AD (74.9±7.6 years).[2] 149 subjects with MCI (74.8±7.2 years).[3] 92 controls (75.7±5.4 years).More than 50% of patients with MCI and AD were carriers of at least one ApoE ε4 allele.