Neoadjuvant Chemotherapy Does Not Increase the Morbidity of Radical Cystectomy: A 10-year Retrospective Nationwide Study

Abstract

Background: Neoadjuvant chemotherapy (NAC) is underutilized in the treatment of bladder cancer (BC).

Objective: To investigate the effect of NAC on the risk of surgical complications for radical cystectomy (RC) in a population-based setting.

Design, setting, and participants: All radical cystectomies performed in Finland during 2005-2014 were included in the study. Data were collected retrospectively using a web-based data collection platform. Complications were recorded for 90 d using the Clavien classification. Patients treated with NAC were compared to patients receiving RC alone using three cohorts and approaches: the entire cohort, a neoadjuvant period cohort, and a matched cohort.

Outcome measurements and statistical analysis: For all three cohorts, odds ratios (ORs) were estimated using simple binary logistic regression. In addition, a multivariable stratified logistic model with propensity score was used. For the matched cohort analysis, both univariate and adjusted analyses were carried out.

Results and limitations: During 2005-2014, 1427 RCs were performed in Finland, of which 1385 were included in the analyses. NAC was introduced in 2008, and 231 patients (16%) were assigned to NAC and 214 (15%) received two or more cycles of chemotherapy. Within 90 d, 61% of patients experienced complications and mortality was 4% (1.9% in the NAC group, and 4.4% in the RC-alone group). In simple binary logistic regression, NAC patients had significantly fewer complications, but this was not observed in multivariable or propensity score analyses. In the matched cohort analyses, no differences in complication rates could be observed. None of the analyses demonstrated higher complication rates in the NAC group.

Conclusions: Our retrospective study reports on nationwide use of NAC for BC and demonstrates that NAC does not increase RC morbidity.

Patient summary: Chemotherapy given before radical surgery does not increase severe postoperative complications in the treatment of bladder cancer.

Keywords: Bladder cancer; Complication; Morbidity; Mortality; Neoadjuvant chemotherapy; Radical cystectomy.