Data are expressed as mean ± SD.

WBC, White Blood Cell; RBC, Red Blood Cell; BUN, Blood Urea Nitrogen; CK-MB, Creatine Kinase-MB; LDH, Lactate Dehydrogenase; PaO2, Partial Pressure of Oxygen; FiO2, Fraction of inspiration Oxygen.

P value is obtained by Kruskal-Wallis one-way ANOVA.

Figure 1. Survival curves of the 88 patients

Figure 2. Time distributions of the mortality rates of patients within 28 days

Figure 3. Constant changes in the WBC, RBC and platelet counts and lymphocyte percentages

Figure 4. Constant changes in the blood biochemical indices. ALT, alanine aminotransferase; AST, aspartate aminotransferase; BUN, blood urea nitrogen; PT, prothrombin time; CK-MB, creatine phosphokinase-Mb; LDH, dehydrogenase.

Figure 5. Constant changes in the inflammatory biomarkers. CRP, C-reactive protein; PCT, procalcitonin.

Figure 6. The main causes of mortality