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Table 3 Distribution of Aβ42/40 ratio and further classification of MCI biomarker-based subgroups

From: Addition of the Aβ42/40 ratio to the cerebrospinal fluid biomarker profile increases the predictive value for underlying Alzheimer’s disease dementia in mild cognitive impairment

  Aβ42/40 ratio < 0.068 Aβ42/40 ratio ≥ 0.068
LL (n = 59) 10 (17%)—IAP 49 (83%)—LL
IAP (n = 21) 14 (67%)—IAP 7 (33%)—LL
SNAP (n = 55) 36 (66%)—HL 19 (34%)—SNAP
HL (n = 62) 56 (90%)—HL 6 (10%)—SNAP
  1. Data expressed as n (percentage) of patients
  2. Aβ42/40 42-aminoacid isoform of amyloid beta/40-aminoacid isoform of amyloid beta, LL Low-AD likelihood, IAP isolated amyloid pathology, SNAP suspected non-Alzheimer pathology, HL high-AD likelihood, AD Alzheimer’s disease