The relation between CSF-TREM2 and tau markers remained but were weaker when restricting the analyses to demented patients who also developed delirium (t-tau, rS = 0.34, p = 0.016, n = 50 and p-tau, rS = 0.37, p = 0.008, n = 50; Fig. 5, Table 2). Here, MAPT is linked to delirium.