ALB and infection: The risk factor that was most highly correlated with postoperative infection was BMI ≥40 kg/m2 (OR: 3.196, 95% CI: 2.32-4.404, P < .0001), followed by albumin <3.5 g/dL (OR: 3.147, 95% CI: 2.419-4.093, P < .0001), diabetes (OR: 1.392, 95% CI: 1.065-1.818, P = .0011), and tobacco use (OR: 1.267, 95% CI: 0.858-1.871, P = .2727).