Acute kidney injury (AKI) is a common complication after liver transplantation, with an incidence of 12.7-95%. The occurrence of acute kidney injury after transplantation is related to the poor prognosis of patients, which significantly increases the length of hospital stay, hospitalization costs and mortality of patients. Early recognition of acute kidney injury after transplantation is of great significance. Therefore, by collecting preoperative and intraoperative variables, this study intends to establish and verify a clinical risk prediction model for early AKI after liver transplantation, in order to provide clinicians with a visual prediction tool to identify patients with high risk of early AKI after liver transplantation immediately after the operation, so as to start clinical intervention as soon as possible and improve the prognosis of patients.

Inclusion Criteria:

• patients who underwent liver transplantation in Beijing Tsinghua Changgung Hospital.

Exclusion Criteria:

• (1) under 18 years of age (2) post-renal transplant (3) liver combined with other organ transplants (4) preoperative requirement for renal replacement therapy (RRT) (5) patients with second or multiple liver transplants (6) preoperative estimated glomerular filtration rate (eGFR) <60 mL/min/1.73m2, and (7) patients with severe illness leading to termination of surgery.

Inclusion criteria for our study comprised consecutive patients undergoing liver transplantation at Tsinghua University Beijing Changgung Hospital from January 1, 2018, to October 15, 2022. Exclusion criteria were as follows: (1) under 18 years of age (2) post-renal transplant (3) liver combined with other organ transplants (4) preoperative requirement for renal replacement therapy (RRT) (5) patients with second or multiple liver transplants (6) preoperative estimated glomerular filtration rate (eGFR) <60 mL/min/1.73m2, and (7) patients with severe illness leading to termination of surgery.