MAPT and Cognitive impairment: The iNPH patients who showed cognitive impairment had lower Aβ42/Aβ40 (0.087 [0.022] vs. 0.097 [0.009], p = 0.036, d = 0.61) and higher p-tau (35.48 [18.00] vs. 22.08 [13.62], p = 0.029, d = 0.84) than patients without cognitive impairment at onset.