From: Intraoperative radiation therapy for colon and rectal cancers: a clinical review
Group | # Patients | 5-year LR | 5-year DM | 5-year OS |
---|---|---|---|---|
R0 resection | 50 | 10% | ~30% | 66% |
R1 resection | 18 | 54% | ~57% | 47% |
R2 resection | 35 | 79% | ~68% | 23% |
 |  | p < 0.0001 | p = 0.002 | p = 0.0009 |
EBRT > 50 Gy | 73 | 36% | - | 50% |
EBRT ≤ 50 Gy | 30 | 50% | - | 45% |
 |  | p = 0.18 |  | p = 0.16 |
R1-2 + IOERT | 9 | 11% | ~12% | 76% |
R1-2, no IOERT | 44 | 82% | ~76% | 26% |
 |  | p = 0.02 | p = 0.01 | p = 0.04 |