After a median follow up of @ years ( IQR @-@ @ ) , @ breast cancers have been reported ( @ -LSB- @ % -RSB- in @ patients in the tamoxifen group vs @ -LSB- @ % -RSB- in @ women in the placebo group ; hazard ratio -LSB- HR -RSB- @ -LSB- @ % CI @-@ @ -RSB- , p < @ ) .