MAPT and Alzheimer disease: After correcting for the other biomarker (model 2), regional tau PET, but not CSF p-tau, was related to MMSE (range sβ’s = − 0.43 to – 0.45, all p < 0.01), attention (range sβ’s = − 0.39 to – 0.45, all p < 0.05), and executive functioning (range sβ’s = − 0.34 to – 0.41, all p < 0.05) within the MCI/AD patients.