. Author manuscript; available in PMC: 2018 May 18.

Published in final edited form as: Alzheimers Dement. 2018 Apr;14(4):535–562. doi: 10.1016/j.jalz.2018.02.018

Table 1.

AT(N) biomarker grouping

A: Aggregated Aβ or associated pathologic state

CSF Aβ₄₂, or Aβ₄₂/Aβ₄₀ ratio

Amyloid PET

T: Aggregated tau (neurofibrillary tangles) or associated pathologic state

CSF phosphorylated tau

Tau PET

(N): Neurodegeneration or neuronal injury

Anatomic MRI

FDG PET

CSF total tau

Abbreviations: Aβ, β amyloid; CSF, cerebrospinal fluid.

NOTE. See section 9.4 for explanation of (N) notation.