Fig. 3

eGFR categorized on the basis of the occurrence of AKI and the AKI reversal status among patients receiving a preoperative high-oral protein load compared to those receiving standard preoperative care. a eGFR at the time of admission and at 3 and 12 months after surgery. b Changes in the eGFR relative to the time of admission. Light grey: patients with standard preoperative care; dark grey: patients receiving a preoperative high-oral protein load. The number of patients in each group at different time points are provided in parentheses. AKI, acute kidney injury; eGFR, estimated glomerular filtration rate