"...naturally that would make a big difference in option selection!!!" You are right, it would be one of the things to consider when choosing a Pca treatment, but there are many other factors to be considered also -- age, PSA, Gleason, Stage, current health concerns besides Pca, treatment side effects, etc.
Good luck as you search for the treatment best for YOU.
Diagnosed Feb 2001 (Age 65) Currently 71
Gleason 3 + 3 = 6
Completed Proton therapy @ Loma Linda - Aug 2001
5yr PSA 0.17
Have had no side effects.