MAPT and Alzheimer disease: For AT(N) biomarkers, AD subjects had a higher prevalence of low CSF Aβ42 or Aβ42/40 or positive amyloid PET, high CSF p-tau, and high CSF t-tau than MCI subjects (Aβ: OR = 5.00; p-tau: OR = 2.03; t-tau: OR = 3.23; all p < 0.001) and CN subjects (Aβ: OR = 20.36; p-tau: OR = 9.69; t-tau: OR = 17.43; all p < 0.001).