Characteristics of study subjects classified by survival outcome.

Abbreviations: HP: Hemoperfusion; RF: Respiratory failure; AKI: Acute kidney injury; IST: Immunosuppressive treatment; MP: Methylprednisolone; CP: Cyclophosphamide; DEX: Dexamethasone; DM: Diabetes mellitus; HTN: Hypertension; CVA: Cerebral vascular accident; CHF: Congestive heart failure; CAD: Coronary artery disease; COPD: Chronic obstructive pulmonary disease.*Independent t-test and Chi-square test were used for analysis.