Simulation scenarios. a) Baseline mean burden for individual toxicities, identified by the acronyms in Tables 1 and 2, and for TTB, obtained from the elicited values in Tables 1-2. b) Each Scenario (Sc) is characterized by percent reductions in mean TTB and hazard ratio (HR) of PFS, for IMRT versus PBT. Scenarios 1-12 were obtained by randomly perturbing toxicity incidences and severity probabilities to give a 50% reduction in mean TTB for PBT, while fixing HR=1. Scenarios 13-16 were obtained by increasing the IMRT versus PBT HR for PFS, while fixing mean TTB difference = 0. Scenario 17 combines Scenarios 6 and 16 to yield a “win-win” scenario for PBT, with a 50% reduction in mean TTB for PBT and 2-fold increase in PFS hazard for IMRT. Scenario 18 combines Scenario 6 with a 2-fold decrease in IMRT-versus-PBT HR for PFS, to yield a “win-lose” scenario for PBT.