After a median follow-up of @ months ( IQR @-@ ) , @-year biochemical disease-free survival was significantly better among patients receiving long-term androgen deprivation than among those receiving short-term treatment ( @ % -LSB- @ % CI @-@ -RSB- vs @ % -LSB- @-@ -RSB- ; hazard ratio -LSB- HR -RSB- @ -LSB- @ % CI @-@ -RSB- ; p = @ ) .