I must have talked to a half dozen excellent medical oncologists about
this and opinions vary. All agree that there are 3 situations that require immediate HT:
1. high PSA (>10 ng/ml), or
2. rapid doubling time (<9 months), or
3. detected metastases or symptoms
Some have incorporated the findings of the TOAD RCT into their practice and use ADT when recurrence after salvage RT (>0.2) is confirmed, while others wait for one of the above 3 events to occur. The ones who discount the TOAD findings argue that 5 years f/u is too short and and the study was underpowered. The ones who go with TOAD point to the fact that quality of life was not impaired by the earlier start, and time to castration resistance was not shortened by it -- so there may be an advantage and there does not seem to be any disadvantage.
www.thelancet.com/journals/lanonc/article/PIIS1470-2045(16)00107-8/abstractNone that I have spoken to would begin ADT at only 0.1. I hope you're discussiing this with a medical oncologist.