Yes, that's because clinicians go from what they feel are the "cancer free" mark. For surgery, when they do the surgery, and for those with treatment (chemo or rad., or both) from the day they finish that treatment. Statisticians (the ones who came up with this 5 year/percentage thing in the first place) go from the day of diagnosis. I was told the same thing about the first 2-3 year higher risk period as well, but way into my surveillance time.