Fig 2. Acceptability curves showing the probability that modified radiotherapy is cost-effective at different thresholds of willingness-to-pay for one life year.

Cost-effectiveness acceptability curves were derived from the 1,000 ICERs based on the bootstrap replicates to illustrate the uncertainty surrounding the cost-effectiveness of the experimental arm radiotherapy. Modified RT is considered cost-effective if the ICER is less than the willingness-to-pay for one life year. The acceptability curve represents the proportion of the replicates where modified RT is cost-effective for a range of different willingness-to-pay.