MAPT and Alzheimer disease: Overall score on the NPI differed between groups (F4,45 = 4.39, P < 0.0001), with FTLD-Tau (Pick’s) (42.2 ± 23.7 points) and FTLD-TDP (25.1 ± 10.9 points) having significantly higher mean scores than for the AD group (11.9 ± 8.0 points, P < 0.001 for both comparisons).