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Five year local–regional control rates versus resection margins and radiotherapy.27
| Margins | No. patients | Radiotherapy dose | 5 year local–regional control | P-value |
|---|---|---|---|---|
| Close (<3 mm) | 66 | ≤ 66 Gy | 62% | 0.07 |
| >66 Gy | 80% | |||
| Gross total excision with positive margins | 101 | ≤ 68 Gy | 28% | 0.0002 |
| >68 Gy | 55% | |||
| Gross residual disease | 26 | ≤ 66 Gy | 50% | 0.15 |
| >66 Gy | 84% |
