Figure 4 | Scientific Reports

Figure 4

From: The QuantuMDx Q-POC SARS-CoV-2 RT-PCR assay for rapid detection of COVID-19 at point-of-care: preliminary evaluation of a novel technology

Figure 4

Comparison between Ct values generated by the laboratory-based SAR-CoV-2 RT-PCR reference assay and the Q-POC assay. (A) Ct values for SARS-CoV-2 positive samples called by both the reference and Q-POC tests (n = 32) with Ct values below the 40 and 45 assay cut-off values, respectively. (B) Linear regression plot to show the correlation be-tween the reference and Q-POC assay Ct values. The line of best fit equation is y = 0.78x + 12.30 (r2 = 0.76). (C) Bland–Altman plot to evaluate the agreement between the reference and Q-POC assay Ct values. The bias between the reference and the Q-POC test is − 6.7 Ct units (solid line) and the 95% limits of agreement are denoted by the dotted lines.

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