Fig. 5

Spearman correlation analyses and Bland-Altmann plots assessing the associations and agreement between plasma p-tau217 assays. The figure displays the plasma vs plasma Spearman’s (rho) correlations between plasma p-tau217+_Janssen and plasma p-tau217_Lilly, as well as Bland-Altmann plots that visualize the agreement between the plasma measures. In the Bland-Altmann plots, the blue line represents the mean difference, and the dotted green and red lines represent 95% confidence intervals (CI). Plasma p-tau217 levels in the scatter plots were z-scored in order to facilitate comparison between plasma p-tau217+_Janssen and plasma p-tau217_Lilly values