Introduction: We sought to identify the factors associated with deterioration of renal functions after robotassisted radical cystectomy, and to develop a nomogram to detect the probability of progression to chronic kidney disease (CKD). Materials and Methods: A retrospective review of our prospectively maintained database. Estimated glomerular filtration rate (eGFR) was calculated using the CKD-Epidemiology Collaboration creatinine formula utilizing all follow-up creatinine values. CKD was defined as stage 3b (eGFR <45 mL/minute/1.73 m 2) based on the National Kidney Foundation classification. Kaplan-Meier curves were used to depict CKD-free survival. A multivariate Cox regression model was used to determine predictors for CKD and to build the perioperative nomogram. Results: The data set comprised 442 patients with a median follow-up of 25 months (12-59). Thirty-seven percent developed CKD at a median of 9 months (4-18
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