Notably, NPAR (OR = 1.0203, 95% CI: 1.0025 to 1.0385, P = 0.025, Fig. 3, Supplementary Table S1), Alb levels (OR = 0.95867, 95% CI: 0.9268 to 0.99167, P = 0.015, Fig. 3., Supplementary Table S1), ASA grade (OR = 0.3442, 95% CI: 0.1366 to 0.8667, P = 0.024, Fig. 3., Supplementary Table S1) and emergency indicator (OR = 2.4461, 95% CI: 1.59356 to 3.7546, P < 0.001, Fig. 3, Supplementary Table S1) were significantly associated with an increased risk of postoperative AKI. Here, ALB is linked to acute kidney injury.