Perioperative Mortality and Long-Term Survival after Radical Cystectomy: A Population-Based Study in a Southern European Country on 4,389 Patients.

ABSTRACT

PURPOSE: Population-based data on survival after radical cystectomy (RC) are lacking from Southern Europe. The aim of this study was to assess trends and determinants of perioperative mortality and long-term survival in the Veneto region (Northeastern Italy). METHODS: All patients submitted to RC for bladder cancer from January 2004 to December 2016 were identified from the regional archive of hospital discharge records. Age at surgery, gender, comorbidities, hospital volume, calendar period of surgery, and type of urinary diversion were retrieved; vital status and cause of death were obtained by linkage with mortality records. Determinants of 90-day mortality were assessed by multilevel logistic regression; long-term survival was investigated by the Kaplan-Meier method and Cox regression. RESULTS: Among 4,389 included patients, an increase in the share of patients aged ≥80 years (from 13% in 2004-2008 to 24% in 2013-2016, p < 0.001) and a decline in performing continent diversion (from 34.9 to 23.4%, p < 0.001) were observed across the study period. Ninety-day mortality did not change over time and was 4% for patients aged <70 years and 13.7% for those aged ≥80 years. Age- and comorbidities-adjusted mortality was significantly lower in hospitals performing >30 RCs/year (odds ratio 0.67, 95% confidence interval 0.48-0.93). At a median follow-up of 67 months, overall survival at 1 year and 5 years was 72 and 40%, respectively, with a higher rate among younger patients treated in high-volume hospitals. CONCLUSION: The population of patients treated with RC is rapidly ageing, with a high risk of perioperative and long-term mortality; this changing epidemiological scenario and better outcomes observed in high-volume hospitals support regionalization of the procedure.