Sensitivity Analyses
We re-analyzed our survival models evaluating the relationship between race/ethnicity and survival to evaluate whether the relationship varied when limited to 5-year hazard of death. The Cox proportional hazard model to determine the 5-year hazard of death (Supplemental Table S1) showed only Hispanic patients having a significantly higher hazard of death than non-Hispanic white patients in both the unadjusted model (p<0.0001) and the adjusted model (p=0.0003). To a large extent, 5- year hazard of death associated with histology type and surgery modality did not differ significantly within each group while significant differences were largely noted in the remaining covariates in both the unadjusted and adjusted models except for hazard of death associated with radiation, which was also non-significant. Additionally, we found no significant interaction between race and histology type in the survival model, indicating there is no differential impact of race on survival by histology type.