| Local Recurrence |
| ||||
Trials | N | Median Follow-Up (years) | No RT | RT | Risk Reduction | p |
NSABP B17 | 813 | 17.25 | 35% | 20% | 47% - 52% | <0.001 |
EORTC 10853 | 1010 | 15.8 | 31% | 18% | 48% | <0.001 |
UK, Aust, NZ | 475 | 12.7 | 26% | 9% | 69% | <0.0001 |
SweDCIS | 1046 | 17 | 32% | 20% | 37.5% | <0.001 |