Fig. 1

ROC curve. SF, D-dimer, LDH, and CRP had the highest AUC values (> 0.80), although ALT, PCT, AST, NLR, NEP, FIB, CK-MB, duration of fever, and duration of cough also achieved predictive significance. The AUCs of albumin and cholesterol, however, were < 0.50, which lacks predictive significance. FIB fibrinogen, PCT procalcitonin, ESR erythrocyte sedimentation rate, LDH lactate dehydrogenase, ALB albumin, CHO cholesterol, ALT alanine aminotransferase, AST aspartate aminotransferase, NEP neutrophil granulocyte count, NLR neutrophil count/lymphocyte count, CRP C-reactive protein, D dimer D-dimer, SF serum ferritin