Figure 1. ROC analysis of significant laboratory indicators for differentiating severe or critically- severe COVID-19 patients from mild or moderate patients. (A–C) AUCs of key laboratory indicators, including neutrophils, NLR, NMR, LMR, HCT, N3R, N4R, N8R, CD3+ T-cell count, CD3+CD4+ T-cell count, and CD3+CD8+ T-cell count.