Overall, the cohort consisted of cognitively normal elderly in good health with 4 of 50 that were both amyloid-positive and tau positive (Aβ42 < 469.5 pg/mL, T-tau > 323 pg/mL or P-tau > 52.8 pg/mL as positive cut-offs), 14 of 50 that were amyloid-negative and tau-positive, 8 of 50 that were amyloid-positive and tau-negative, and 24 of 50 that were both amyloid-negative and tau-negative (Table 1). Here, MAPT is linked to amyloidosis.