APOE and Alzheimer disease: One study reported no significant correlations between MMSE and total or individual taste scores, subjective assessments, or ApoE ε4 genotype in AD patients [31], whereas another study found significant correlations between the total gustatory test score and MMSE scores, as well as between salty taste scores and MMSE, Aβ42 levels, and the p-tau181/Aβ42 ratio [3].