Table 1.
PTV, rectum and bladder DVH data for the two bladder filling protocols.
| Volume | Dose objectives | Tolerance | Empty bladder protocols Mean (95%CI) | Full bladder protocols Mean (95%CI) | P-value |
|---|---|---|---|---|---|
| PTV | D98% | ≥57 Gy | 58.0 Gy (57.8 Gy–58.3 Gy) | 57.9 Gy (57.7 Gy–58.0 Gy) | p = 0.32 |
| D50% | =60 Gy | 60 Gy | 60 Gy | N/A | |
| D2% | ≤63 Gy | 61.6 Gy (61.4 Gy–61.8 Gy) | 61.6 Gy (61.5 Gy–61.7 Gy) | p = 0.74 | |
| Rectum | V42Gy | 60% | 30.2% (22.7–37.7%) | 30.6% (21.0–40.2%) | p = 0.85 |
| V50Gy | 50% | 19.0% (14.8–23.2%) | 18.7% (11.4–25.9%) | p = 0.44 | |
| V54Gy | 30% | 14.2% (11.0–17.3%) | 13.6% (7.5–19.6%) | p = 0.28 | |
| V58Gy | 15% | 7.9% (6.0–9.9%) | 7.9% (3.9–11.9%) | p = 0.44 | |
| Bladder | V42Gy | 50% | 53.1% (43.9–62.3%) | 19.8% (13.9–25.7%) | p < 0.05 |
| V50Gy | 25% | 40.0% (33.0–47.1%) | 14.1% (10.5–17.7%) | p < 0.05 | |
| V62Gy | 5% | 0.5% (0.2–1.1%) | 0.2% (0.1–0.4%) | p = 0.22 | |