MAPT and oculocutaneous albinism type 1: Independent of the ATN classification, a higher CSF Aβ42/t-tau ratio (p < 0.0001), higher CSF Aβ42 (p = 0.0013), lower p181-tau (p = 0.0005) and lower t-tau (p = 0.0001) were associated with a slower decline in MMSE (p-values represent values at 3 years, although significant differences are already noted starting from time 18 as shown in Table 3).