Table 2.

Evaluation of diagnostic performance according to Ct values of tests including ROC curve analysis.

ROC Curve Parameters
	SARS-CoV-2	Influenza A	Influenza B
AUC	0.928	0.907	0.801
95% CI (min-max)	0.877–0.980	0.849–0.94	0.522–1
p	<0.001	0.029	0.03
Cut-off	20	22	15
Sensitivity (%)	79.6	81.8	83.3
Specificity (%)	98	94.1	88.9

AUC: Area under the curve and CI: confidence interval.