At a median follow-up of @ years ( range , @ to @ years ) for @ surviving patients , no differences were observed in OS ( hazard ratio -LSB- HR -RSB- , @ ; @ % CI , @ to @ ; P = @ ; @-year survival , @ % v @ % ) , PFS ( HR , @ ; @ % CI , @ to @ ; P = @ ; @-year estimate , @ % v @ % ) , LRF ( HR , @ ; @ % CI , @ to @ ; P = @ ; @-year estimate , @ % v @ % ) , or DM ( HR , @ ; @ % CI , @ to @ ; P = @ ; @-year estimate , @ % v @ % ) .