Acute kidney injury (AKI) is a common complication after pediatric liver transplantation (PLT), and renal impairment after LT has proven to be related with increased graft failure and mortality. The recovery mode of kidney injury after PLT has not been systematically studied. Therefore, in this study the investigators aimed to systematically evaluate prognosis of AKI after PLT, combine the recovery mode of AKI with related risk factors, and establish a relationship between AKI and CKD.

Inclusion Criteria:

• Patients who received a liver transplant for the first time.
• Patients who were younger than 18 years of age at the time of transplant.

Exclusion Criteria:

• Patients with incomplete clinical data.
• Patients with less than 5 years of follow-up.
• Patients who have combined multiple solid organ transplants.
• Patients with preoperative renal impairment (eGFR<60ml/min/1.73 m2 or prior renal replacement therapy).

This study was conducted on pediatric patients (aged ≤18 years) who received liver transplantation at Tianjin First Central Hospital in China between January 1, 2014 and December 31, 2018