Cleveland Clinic just published a study on it. They found it to be a good predictor of metastatic progression after surgery.
A Genomic Classifier Improves Prediction of Metastatic Disease Within 5 Years After Surgery in Node-negative High-risk Prostate Cancer Patients Managed by Radical Prostatectomy Without Adjuvant Therapy.Recent clinical trials demonstrated an advantage to adjuvant treatment over waiting to see. A recent analysis showed that a PSA≥.03 on an ultrasensitive test is a good predictor that the PSA will eventually hit .2, which defines a biochemical recurrence. So if he holds at .01, he is below that threshold for now. His positive surgical margin increases the probability that adjuvant radiation will be successful. His RO may let him forgo the hormone therapy if that is the deal breaker.