Table 5

Breast cancer mortality reduction by radiation after conservative surgery (lumpectomy, conservation)

Hazard ratio

Two-tailed P value


Radiotherapy only to conserved breast

0.84

0.004

Radiotherapy only to conserved breast and other sites (lymph nodes)

0.83

0.0002


Breast alone versus breast plus lymph nodes. Adapted from Early Breast Cancer Trialists Collaborative Group [6].

Ragaz Breast Cancer Research 2009 11(Suppl 3):S14   doi:10.1186/bcr2433