The OS in MRM and BCT patient were 97.57% and 96.73% (P=0.66). The DFS in MRM and BCT patients were 91.57% and 86.04% (P=0.37).

• 保乳组的无病存活率为86·04%25,改良根治组为91·57%25两者差异无显著性(P=0·37)。