Table 2.

The diagnostic value of PCT, CPR, NRT and combined effect for COVID-19 mortality.

Variables	AUC	95% CI	Cut-off value	Sensitivity	Specificity
PCT, ng/mL	0.74	0.62–0.87	0.10	0.94	0.44
CRP, mg/L	0.83	0.73–0.93	52.13	0.88	0.71
NLR	0.69	0.56–0.83	3.59	0.94	0.39
Combined (logit)	0.84	0.75–0.93	0.12	0.94	0.64

COVID-19 coronavirus disease 2019, AUC area under the curve, 95%CI confidence interval PCT procalcitonin, CRP C-reaction protein, NLR neutrophil-to-lymphocyte ratio.