EPIC urinary bother at baseline and following SBRT for prostate cancer. (a) Urinary bother was stratified to three levels of bother: no problem, very small-small problem, and moderate-big problem. (b) Average overall urinary bother scores (Question 5 of the EPIC-26). Thresholds for clinically significant changes in scores (½ standard deviation above and below the baseline) are marked with dashed lines. EPIC scores range from 0–100 with higher values representing a more favorable health-related QOL.