Table 2.
Dose-volume characteristics of hypofractionated and conventional radiotherapy arms
| Hypofractionated | Conventional | p-value | |
|---|---|---|---|
|
| |||
| Rectum wall | |||
|
| |||
| Total volume ± σ [cc] | 46 ± 14 | 44 ± 12 | 0.8423 |
| V87.5% (Gy) ± σ (%) | 30 ± 6 | 29 ± 5 | 0.2378 |
| V62.5% (Gy) ± σ (%) | 45 ± 9 | 42 ± 8 | 0.1634 |
|
| |||
| Bladder wall | |||
|
| |||
| Total volume ± σ [cc] | 38 ± 12 | 42 ± 14 | 0.1826 |
| V87.5% (Gy) ± σ (%) | 36 ± 8 | 34 ± 11 | 0.1754 |
| V62.5% (Gy) ± σ (%) | 41 ± 11 | 45 ± 13 | 0.1334 |
|
| |||
| PTV | |||
|
| |||
| Total volume ± σ [cc] | 181 ± 39 | 184 ± 41 | 0.5145 |
| D98% ± σ (% prescribed dose) | 89% ± 1% | 88% ± 1% | 0.5937 |
| D50% ± σ (% prescribed dose) | 100% ± 1% | 100% ± 1% | 0.2172 |
| D2% ± σ (% prescribed dose) | 105% ± 1% | 105% ± 1% | 0.4745 |
PTV — planning target volume; cc — cubic centimeter; Gy — gray