Fig. 4From: Elecsys CSF biomarker immunoassays demonstrate concordance with amyloid-PET imagingCSF biomarker relationships for a tTau versus Aβ42 and b pTau versus Aβ42. Diagonal lines represent the split between the two clusters. Horizontal and vertical lines represent the cut-offs. Red symbols represent Aβ-PET+; blue symbols represent Aβ-PET–; circles represent cognitively normal participants; triangles represent participants with MCI; squares represent participants with AD. Abbreviations: Aβ, β-amyloid; Aβ42, β-amyloid (1–42); AD, Alzheimer’s disease; CSF, cerebrospinal fluid; MCI, mild cognitive impairment; PET, positron emission tomography; pTau, phosphorylated tau (181P); tTau, total tauBack to article page