2.2. Data retrieval method

The worst laboratory test and the mean value of vital signs during the first 24 h of ICU admission were collected. Such as age, gender, heart rate (HR), systolic pressure (SBP), diastolic pressure (DBP), and respiratory rate (RR), the maximum level of blood ammonia during hospitalization and the biochemical examinations (alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin (ALB), total bilirubin (Tbil), PTT, INR, PT, WBC, hemoglobin (HGB), platelets (PLT), BUN, creatinine (Cr), glucose (Glu), and ammonia), S_PO₂ of patients within 24 h of admission, and SAPS II score, qSOFA score of patients, length of stay hospital (LOS), and hospital mortality.