However, subgroup analysis suggested that (pre)diabetic conditions might accelerate decrease of Aβ1-42, but increase of t-Tau levels in the CSF of subjects with cognitive impairment, and the association with p-Tau in the CSF was stronger (P = 0.001) for diabetes than those of prediabetes (P = 0.61). This evidence concerns the gene MAPT and prediabetes syndrome.