MAPT and Alzheimer disease: Figure 1 shows correlations among the demographic features and CSF biomarkers in the iNPH and AD groups (Figure 1). Both in AD and iNPH, Aβ42/Aβ40 correlated with Aβ42 and p-tau correlated with t-tau. In the iNPH group Aβ42/Aβ40 also correlated with p-tau.