CVC....PSA doubling time 'PSADT' is a predictor and has no "normal" rise. It is used to identify how fast the PSA rises over time. Usually taken over 18 months with three readings each showing an increasing rise. Regardless of the base line you start at...if it doubles in three years or less you would want it to be investigated as to the reason. It could be BHP or infection or PCa. Use the base line of .066 times the size of your prostate to give the expected value of your PSA. In your case 1.01 divided by .066 gives you a 15.3 cc gland size....definitely not an enlarged gland. So find out what your gland size actually is and then you can figure what your PSA level could be mathmatically. Just remember this isn't exact...just a guide of what you could expect. I think that is why for your age the normal PSA could be as high as 2.5 and you are at a level below that even with an enlarged gland.
For me, my gland was 38cc which is considered only slightly enlarged. With that size my PSA should have been 2.5, however it increased to 4.6 which prompted the biopsy because it had a doubling time of 22 months. (2.6 to 4.6 in 18 months)
Age 58 at Diagnosis
Oct 2006 - PSA 2.6 - DRE Normal
May 2008 - PSA 4.6 - DRE Normal / TRUS normal-Gland 38 cc
July 2008 - Biopsy 4 of 12 Positive 5 - 30% Involved
Gleason (3+3) 6 Stage T1C
No Treatment Decided yet