Fig. 1From: The cerebrospinal fluid biomarker ratio Aβ42/40 identifies amyloid positron emission tomography positivity better than Aβ42 alone in a heterogeneous memory clinic cohortROC analysis for CSF biomarkers and biomarker ratios versus amyloid PET positivity. Aβ, amyloid beta; CSF, cerebrospinal fluid; PET, positron emission tomography; pTau181, phosphorylated tau 181; ROC, receiver operating characteristic; tTau, total tauBack to article page