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Objectives  To compare the perioperative and early renal functional outcomes of RPN with OPN for kidney tumors.    Materials and Methods  A total of 209 RPN or OPN patients with availability of preoperative cross-sectional imaging since 2009 at our center were included. To adjust for potential baseline confounders propensity-score matching was performed, which resulted in 94 OPNs matched to 51 RPNs. Perioperative and early renal functional outcomes were compared.    Results  In propensity-score matched analysis, RPN procedures were well tolerated and resulted in significant decreases in postoperative analgesic time (24 vs. 48 hr,  p <0.001) and visual analog pain scale (3 vs. 4,  p <0.001). Besides, the RPN patients had a significantly shorter LOS (9 vs. 11 days,  p  = 0.008) and less EBL (100 vs. 200 ml,  p <0.001), but median operative time was significantly longer (229 vs. 182 min,  p <0.001). Ischemia time, transfusion rates, complication rates, percentage eGFR decline and CKD upstaging were equivalent after RPN versus OPN. In multivariable logistic regression analysis, RPN patients were less likely to have a prolonged LOS (odds ratio [OR]: 0.409;  p  = 0.016), while more likely to experience a longer operative time (OR: 4.296;  p  = 0.001). However, the statistical significance for the protective effect of RPN versus OPN in EBL was not confirmed by examining the risk of EBL≥400 ml (OR: 0.488;  p  = 0.212).    Conclusions  When adjusted for potential selection biases, RPN offers comparable perioperative and early renal functional outcomes to those of OPN, with the added advantage of improved postoperative pain control and a shorter LOS.

A Propensity-Score Matched Comparison of Perioperative and Early Renal Functional Outcomes of Robotic versus Open Partial Nephrectomy