Table 2.
Postdosimetric parameters (all patients: n = 200)
|
Bounce (-) (n=150) |
Bounce (+) (n=50) |
P value |
|
|---|---|---|---|
| (mean ± SD) | (mean ± SD) | (t-test) | |
| Prostate volume at postdosimetry (mL) |
27.3 ± 8.7 |
29.0 ± 8.9 |
0.233 |
| %D90 (%) |
110.6 ± 9.9 |
109.7 ± 9.1 |
0.577 |
| D90 (Gy) |
152.3 ± 24.5 |
153.3 ± 19.4 |
0.772 |
| V100 (%) |
93.7 ± 3.6 |
93.5 ± 3.6 |
0.700 |
| V150 (%) |
62.3 ± 10.4 |
62.1 ± 10.3 |
0.881 |
| R100 (mL) |
0.10 ± 0.19 |
0.08 ± 0.10 |
0.668 |
| Urethral volume (mL) |
0.53 ± 0.28 |
0.41 ± 0.23 |
0.004 |
| %UD90 (%) |
97.6 ± 12.8 |
101.8 ± 12.7 |
0.049 |
| UD90 (Gy) |
134.1 ± 24.5 |
142.5 ± 23.6 |
0.035 |
| %UD30 (%) |
140.2 ± 18.0 |
143.8 ± 22.3 |
0.256 |
| Minimal urethral dose (Gy) |
100.9 ± 21.6 |
111.3 ± 22.2 |
0.004 |
| BED (Gy2) | 188.5 ± 25.2 | 177.0 ± 23.2 | 0.005 |