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. 2017 Nov 6;74(12):1492–1501. doi: 10.1001/jamaneurol.2017.2814

Figure 2. Frequency Plots of Cerebrospinal Fluid (CSF) β-Amyloid (Aβ) 42 Levels and Aβ42:Aβ40 and Aβ42 to Phosphorylated Tau (P-tau) Ratios.

Figure 2.

Histograms of frequency distribution for CSF Aβ42 levels and the Aβ42:Aβ40 and Aβ42:P-tau ratios across groups with Aβ-positive (n = 113) and Aβ-negative (n = 149) visual ratings. Veritical dashed lines indicate cutoff points associated with the Youden J index. EI indicates EUROIMMUN; INC, classic INNOTEST; INM, modified INNOTEST; and MSD, Meso Scale Discovery.