ALB and acute kidney injury: The significant differences between the two groups were shown before PSM analysis, including age, gender, BMI, admission type, AKI stage, WBC, hemoglobin, albumin, bicarbonate, hypertension, diabetes, CKD, CHF, myocardial infarction, ventilation, hemodialysis, SOFA, SAPS-II, CCI, heart rate, MAP, respiratory rate, temperature and SpO2 (Table 1).