Supplementary Material for: Short-Term and Long-Term Morbidity after Radical Cystectomy in Patients with NMIBC and Comparison with MIBC: Identifying Risk Factors for Severe Short-Term Complications

<b><i>Introduction:</i></b> RC represents a viable treatment option for certain NMIBC patients. However, studies investigating morbidity in the context of RC for NMIBC are scarce. The goal of the current study was to assess and compare morbidity after RC performed in patients with NMIBC and patients with MIBC and to identify risk factors for severe short-term complications. <b><i>Methods:</i></b> Medical records of 521 patients who underwent RC for bladder cancer were retrospectively reviewed. Patients were divided into patients with NMIBC and patients with MIBC. The groups were compared and risk factors for severe complications were identified. <b><i>Results:</i></b> RC for NMIBC was performed in 123 patients (23.6%). Histological upstaging was seen in 47 NMIBC patients (38.2%) and in 231 MIBC patients (58%, <i>p</i> &lt; 0.001). OS was 29.8% and CSS was 15.5%. Both endpoints were higher for RC for MIBC (<i>p</i> &lt; 0.001). More complications affecting the urinary diversion were seen with RC for NMIBC (<i>p</i> = 0.033) and more continent urinary diversions (<i>p</i> = 0.040) were performed in those patients. Obesity (<i>p</i> = 0.008), a higher ASA score (<i>p</i> = 0.004), and preoperative medical drug anticoagulation (<i>p</i> = 0.025) were risk factors for severe short-term morbidity after both, RC for NMIBC and for MIBC. <b><i>Conclusion:</i></b> Patients who underwent RC for NMIBC are exposed to a comparably high perioperative risk than patients with MIBC. RC seems to be a viable treatment option for certain NMIBC patients with a significant histological upstaging in both groups. In patients with obesity, a high ASA score, and with medical drug anticoagulation, the indication for surgery should be confirmed especially strict and possible treatment alternatives should be considered particularly thorough.