A warm welcome to you. I found this site too while searching for info on younger men just over a year ago, and it has been an invaluable source of information and support for us. To our immense shock, my husband's (also a "Chris") biopsy was positive too and it was a shock. After a year of (retrospectively) tracking down his previous results from other doctors after his surgery, I located an isolated result of PSA at 2.1 in 2001 when my hubby was 43 (He did not even know it had been taken and was told it was fine). Although my husband was diagnosed on his 49th birthday, it I had known then what I know now, I would have talked through the 2001 PSA results more, and perhaps have enquired about a biopsy then. My feeling now is that my husband's cancer may have been minutely present for several years prior to his actual diagnosis.
Just a tip from us about the statistics however, and how they make you feel at the moment.. (You may be different of course, so take this as a "tip" only) ... We personally refuse to read or consider the "statistics" for younger men available for the reasons you have discovered, although they are around, and others may direct you to them (I did not look that far I must admit). We have heard however from our specialist that only about 15 years of credible info has been collected to this point on the younger than 50 age-groups and it is on-going (happy to be corrected if this is not accurate). The 85% is just a general for that age-group based on overall what they (researchers) don't know at the moment. We personally intend to live for another 20 years at least whatever the stats say...
Reading the statistics is depressing at any age we personally find (other do not of course) but worse for those in their 40's, so we avoid reading them, and instead work out our own future plans. It is still taking time to get over it all - psychological recovery is long, but it does ease up and life does go on. We have heard many wonderful recovery outcomes here on this site which is uplifting. If you find support in faith, there are also many, many prayers here which we found invauable for coping. The hardest part of waiting to see the results of the tests which may follow and making decisions. Keep posting if you find it helpful & good luck. There is a lot of info here.
All the best, Lana & CJ.