Table 2.
Treatment characteristics
| Primary Treatment Received | ||
|---|---|---|
| Laryngectomy and Adjuvant Radiotherapy | Radiotherapy | |
| No. of Patients (%) | No. of Patients (%) | |
| Nodal Status | ||
| N0 | 53 (24) | 21 (9.50) |
| N1 | 28 (13) | 13 (6) |
| N2A | 2 (1) | 4 (2) |
| N2B | 31 (14) | 11 (5) |
| N2C | 30 (13.5) | 9 (4) |
| N3 | 15 (7) | 1 (0.5) |
| NX | 2 (1) | 1 (0.5) |
| Chemotherapy | ||
| Induction+Concurrent | 4 (2) | 14 (6) |
| Concurrent | 24 (11) | 26 (12) |
| Induction | 2 (1) | 11 (5) |
| None | 129 (58) | 9 (4) |
| Unknown | 2 (1) | 0 (0) |
| Total Radiation Dose (Gy) | (mean 60.31± s.d. 5.7) | (mean 69.5± s.d. 8.3) |
| No. of Fractions Received | (mean 31.21± s.d. 4.4) | (mean 38± s.d. 12.3) |
| BED | (mean 72 ± s.d. 0.5) | (mean 82.9± s.d. 1.2) |
| Radiotherapy Technique | ||
| 2D/3D Conformal | 119 (54) | 33 (15) |
| IMRT | 42 (19) | 27 (12) |
| Radiation Beam Energy | ||
| 6 MV | 81 (37) | 42 (19) |
| 60Co | 79 (36) | 18 (8) |
| Unknown | 1 (0.5) | 0 (0) |
| Fractionation Schedules | ||
| Altered | ||
| Twice daily | 3 (1) | 9 (4) |
| Concomitant boost | 6 (3) | 9 (4) |
| Conventional | 152 (69) | 42 (19) |
Abbreviations: BED, biologically equivalent dose; IMRT, intensity-modulated radiotherapy