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. 2015 Oct 2;10(10):e0139049. doi: 10.1371/journal.pone.0139049

Fig 2. Correlation between Assay 1 and Assay 2.

Fig 2

The log-transformed CA 19–9 values of all subjects from Assay 1 and Assay 2 were plotted with respect to each other. Each circle indicates an individual patient sample. The trendline is the linear-least squares best fit, and the Spearman’s rank correlation coefficient is 0.74.