MAPT and Alzheimer disease: The Tau/Aβ1-42 ratio (rpAD, median: 1.32, IQR = 1.07; non-rpAD, median: 0.75, IQR = 0.77) and the p-Tau/Aβ1-42-ratio (rpAD, median: 0.18, IQR = 0.18; AD, median: 0.14, IQR = 0.13) were higher in the rpAD group, which turned out to be highly significant in exploratory comparisons (Tau/Aß1-42: p < 0.001; p-Tau/Aβ1-42: p = 0.007) as well as in corrected regression models (Tau/Aβ1-42: p = 0.004; p-Tau/Aβ1-42: p = 0.004).