woodstock97,
I'll come out of my self-imposed exile this once to make a point about the MSK post-op nomogram.
Look at the difference between the inputs for the MSK nomogram and, say, the Han Table (Johns Hopkins). The latter asks only for your last pre-op PSA reading, your post-op Gleason score, and whether your PCa was organ confined or not. That's it. None of those will change over time after your operation.
In sharp contrast, the MSK post-op nomogram asks for your PSA reading, your age, your Gleason score, the year of your prostatectomy, whether you had positive surgical margins, whether you had extra capsular extension, whether you had seminal vesicle involvement, whether you had lymph node involvement, whether you had neoadjuvant hormones, whether you had prior radiation therapy - and, critically important for your situation, the number of months post-op free of biochemical recurrence.
Thus, the fact that you (like me) have gone 23 months post-op with undetectable readings is good - not a guarantee of anything by any means, but still everything considered a good thing - and the Johns Hopkins Table does not take that into account.
In my opinion, Scardino has an even better predictive diagram, although the latest version of which I am aware stops with surgeries performed in 2004. His predictions are very similar to those of the MSK Tables, probably not surprisingly.
I would be very interested in what Mel (compiler), our resident mathematician, has to say about the various nomograms.
Zen9