Which is better - Immediate or Delayed Radiation After Radical Prostatectomy ?

Many men who undergo radical prostatectomy are found to have cancer growing outside the gland.

Often, doctors recommend radiation to the prostate bed after urinary control returns.

 A previous well done study showed that immediate radiation did improve survival at 10 years but it never answered the question whether radiation could be delayed.

Now a good study has addressed this question and it is discussed by Dr. Gerald Chodak in the following video: