Table 5.
Dmax for the spinal cord and brainstem by primary site
| Dmax |
P value |
|||||
|---|---|---|---|---|---|---|
| SIB | Two-phase IMRT | SEQ-SIB | SIB vs two-phase IMRT | SIB vs SEQ-SIB | SEQ-SIB vs two-phase IMRT | |
| Spinal cord | ||||||
| Nasopharynx (Gy) | 42.3 ± 1.2 | 43.6 ± 0.8 | 40.0 ± 1.8 | 0.01 | 0.004 | <0.0001 |
| Oropharynx (Gy) | 41.9 ± 1.7 | 44.2 ± 1.2 | 40.6 ± 1.8 | 0.003 | 0.11 | <0.0001 |
| P-value | 0.6 | 0.2 | 0.4 | |||
| Brainstem | ||||||
| Nasopharynx (Gy) | 51.6 ± 1.6 | 53.3 ± 0.9 | 49.9 ± 1.0 | 0.01 | 0.008 | <0.0001 |
| Oropharynx (Gy) | 48.5 ± 1.6 | 47.7 ± 5.1 | 44.9 ± 3.6 | 0.62 | 0.009 | 0.17 |
| P-value | 0.0005 | 0.003 | 0.0005 | |||