ALB and acute kidney injury: In the AKI group, the mean hemoglobin (11.0 ± 2.2 g/dL), serum albumin (3.2 ± 0.7 mg/dL), and total CO2 (23.8 ± 4.5 mEq/L) were lower than those without AKI (12.9 ± 2.0 g/dL; 4.0 ± 0.6 mg/dL; and 25.3 ± 3.5 mEq/L, respectively).