ALB and acute kidney injury: Advanced age (OR: 1.05; 95% CI: 1.03–1.08; P < .001)Low pre-operative albumin level (OR: 0.45; 95% CI: 0.29–0.68; P < .001)Postoperative AKI (OR: 2.33; 95% CI: 1.45–3.73; P < .001)AKI severity: AKI stage 1 (OR: 3.02; 95% CI: 1.82–5.02; P < .001), AKI stage 2 (OR: 5.20; 95% CI: 2.26–12.00; P < .001), AKI stage 3 (OR: 6.20; 95% CI: 2.65–14.51; P < 0.001)Pre-existing renal dysfunction (OR: 3.51; 95% CI: 2.33–5.28; P < .001)