The effect of chronic kidney disease on adverse in-hospital outcomes after radical cystectomy with ileal conduit urinary diversion.

Purpose: Chronic kidney disease (CKD) is frequent in bladder cancer patients undergoing radical cystectomy (RC) with ileal conduit. However, the effect of CKD on adverse in-hospital outcomes after ileal conduit RC is not well known.

Methods: Descriptive analyses, propensity score matching (PSM), and multivariable logistic and Poisson regression models were used to address National Inpatient Sample patients treated with ileal conduit RC between 2006 and 2019. CKD severity was stratified as mild (stage II) vs. moderate (stage III) vs. severe (stage IV/V).

Results: Of 13,359 patients treated with RC with ileal conduit, 1973 (14.8%) had CKD. Of those, 956 (48.5%), 802 (40.6%), and 215 (10.9%) were classified as mild, moderate, or severe CKD, respectively. CKD rate increased from 4.1 to 21.9% (2006-2019, EAPC: +8.9%, p < 0.001). CKD RC patients exhibited higher rates of adverse in-hospital outcomes in 11 of 15 categories. The absolute differences were largest for overall complications (+ 13.2%), prolonged length of stay (+ 7.0%), blood transfusions (+ 6.0%, all p < 0.001). After detailed multivariable adjustment, CKD was an independent predictor of 11 of 15 adverse in-hospital outcomes' categories. The detrimental effect of CKD was most pronounced for dialysis (OR 7.09), overall complications (OR 1.84), and neurological complications (OR 1.61, all p < 0.001). Finally, a dose-response effect according to CKD severity on adverse in-hospital outcomes was observed in eight of 15 categories.

Conclusions: CKD RC patients invariably exhibited higher rates of adverse in-hospital outcomes after RC with ileal conduit. In consequence this patient group should receive particularly strong consideration for preoperative optimization.