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Predictive Factors for Acute Kidney Injury and Long-Term Renal Function Loss After Partial Nephrectomy: A Prospective Single-Center Study.

Urology 2023 Februrary
OBJECTIVE: To find factors related to postoperative acute kidney injury and long-term significant renal function (RF) loss after partial nephrectomy (PN) in Chinese population.

METHODS: The main outcome was significant RF loss during the last follow-up, which was defined as >25% decrease in estimated glomerular filtration rate.

RESULTS: A total of 416 patients were included with median age as 57 (interquartile ranges,IQR 49.8-65.0) year with body mass index as 24.2 (IQR 22.0-26.5) kg/m2 and preoperative estimated glomerular filtration rate as 90.5 (IQR 79.8-101) mL/min. Summarily, 259 (62.3%) patients were male, 54 (13%) had diabetes, 180 (43.3%) hypertension and 80 (19.2%) hyperuricemia. Median (IQR) tumor diameter was 3.1 (2.4-4.1) cm. All patients underwent PN, in which 135 (32.5%) by open PN approach, 109 (26.2%) by laparoscopic PN and 172 (41.3%) by robot assisted PN. RF was followed up for 16.88 (10.15-36.37) months, where 58 (13.9%) patients suffered significant RF loss. Multivariable analysis showed age (P = .0039), body mass index (P = .0049), diabetes (P = .0351), operative time > 110 minutes (P = .0034), diameter classification by Diameter-Axial-Polar score (diameter 2.4 cm-4.4 cm, P = .0225: diameter > 4.4 cm, P = .0207), postoperative acute kidney injury (P < .001) to be predictors of RF loss with area under the curve as 0.850.

CONCLUSION: We prospectively found predictive factors of short and long-term significant RF loss in all operative methods and constructed a clinical nomogram for long-term Chinese patients RF loss.

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