Patients were randomly assigned ( 1:1 ) using a computer-generated randomisation schedule to receive either 4 months of androgen deprivation combined with three-dimensional conformal radiotherapy at a minimum dose of 76 Gy ( range 76-82 Gy ; short-term androgen deprivation group ) or the same treatment followed by 24 months of adjuvant androgen deprivation ( long-term androgen deprivation group ) , stratified by prostate cancer risk group ( intermediate risk vs high risk ) and participating centre .