While the data was not statistically significant, there was a strong trend towards a difference in survival (HR = 0.61, Chi square: 3.41, p = 0.06) in favor of lower age, which did become significant on multivariate analysis (HR = 0.28, Chi square 6.42, p = 0.01).
While there was no significance to the stratification of patient outcomes based on treatment type, likely due to this analysis being underpowered to detect this difference, there was a trend toward significance with the GKS as a boost after surgery or as salvage after surgery being associated with longer survival times as compared to the other treatment types.