This retrospective analysis was approved by the local ethics committee of the Justus-Liebig-University Giessen, Germany (institutional review board no. AZ 123/18). A total of 116 consecutive patients who had undergone KT between 2013 and 2017 were analyzed and were followed up to December 31, 2021. The collected data included the following demographic characteristics: age, sex, body mass index (BMI), underlying kidney disease, duration of dialysis, warm and cold ischemia times, intra- and postoperative course, delayed graft function, graft failure, rejection rate, surgical complications, and overall patient and graft survival data. Comorbidities were classified and analyzed by the Charlson comorbidity index [21 (
link)].
Renal function was assessed using serum creatinine levels and estimated glomerular filtration rate (eGFR) according to the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula at 1, 2, 3, 4, and 5 years after KT. Delayed graft function (DGF) was defined as the need for at least one dialysis within the first 7 days following KT [22 (
link)].
Complications in the first 30 days after KT were classified according to the Clavien-Dindo classification [23 (
link)]. The Clavien-Dindo ≥ 3a were defined as severe and included in the statistical analysis.