ALB and diabetes mellitus: The risk factor that was most highly correlated with postoperative readmission was albumin <3.5 g/dL (OR: 2.173, 95% CI: 1.865-2.532, P < .0001), followed by BMI ≥40 kg/m2 (OR: 1.79, 95% CI: 1.439-2.226, P < .0001), tobacco use (OR: 1.389, 95% CI: 1.13-1.706, P = .0003), and diabetes (OR: 1.225, 95% CI: 1.057-1.419, P < .0001).