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