CTS5 Online Test for determining if only five years of hormone therapy is okay instead of ten

I think what I'm concerned with - someone plugging in to the calculator, coming up with low risk and then deciding not to go ahead with treatment without understanding other factors that may contribute to a different outcome.  It's one thing to make a decision with all of the facts (at least the known ones) but this on it's own, does not seem to give much real information.