Peri-operative allogeneic blood transfusion and outcomes after radical cystectomy: a population-based study

To describe factors associated with peri-operative blood transfusion (PBT) at radical cystectomy (RC) for patients with bladder cancer and evaluate its association on both early and late outcomes. Electronic records of treatment and surgical pathology reports were linked to the population-based Ontario Cancer Registry to identify all patients who underwent RC between 2000 and 2008. Modified Poisson regression model was used to determine the factors associated with PBT. A Cox-proportional hazards regression model was used to explore the association between PBT and overall (OS) and cancer-specific (CSS) survival. Among 2593 patients identified, 62% received an allogeneic red blood cell transfusion. The frequency of PBT decreased over the study period (from 68 to 54%, p < 0.001). Factors associated with PBT included age, sex, greater co-morbidity, stage, and surgeon volume. PBT was associated with inferior outcomes, including median length of stay (11 vs. 9 days, p < 0.001), 90-day re-admission rate (38 vs. 29%, p < 0.001), and mortality (11 vs. 4%, p < 0.001). OS and CSS at 5 years were lower among patients with PBT on multivariate analysis (OS HR 1.33, 95% CI 1.20-1.48; CSS HR 1.39, 95% CI 1.23-1.56). Although rates are decreasing, these data suggest a very high utilization rate of PBT at time of RC in routine clinical practice. PBT is associated with substantially worse early outcomes and long-term survival. This association persists despite adjustment for disease-, patient-, and provider-related factors, suggesting that PBT is an important indicator of surgical care of RC.