Table 2 Dosimetric and radiation characteristics
Treatment Plan | MRI | CT alone | P-value | ||
|---|---|---|---|---|---|
Percentage | Number of patients (3239) | Percentage | Number of patients (160) | ||
Prostate and SV only | Total = 86.97% | Total = 2817 | Total = 77.50% | Total = 124 | |
3625 cGy in 5 fractions | 10.77% | 349 | 5.00% | 8 | 0.048 |
3500 cGy in 5 fractions | 76.20% | 2468 | 72.50% | 116 | |
Pelvic Nodal Radiation* | Total = 13.03% | Total = 422 | Total = 22.50% | Total = 36 | |
1950 cGy in 3 fractions | 2.35% | 76 | 1.25% | 2 | 0.264 |
2100 cGy in 3 fractions | 10.59% | 343 | 21.25% | 34 | |
1800 cGy in 3 fractions | 0.06% | 2 | 0% | 0 | |
1650 cGy in 3 fractions | 0.03% | 1 | 0% | 0 | |
Volumes | |||||
Prostate CTV (cc) (95% CI) | 76.90 (75.74–78.06) | 2814 | 82.56 (76.89–88.23) | 138 | 0.055 |
ADT | |||||
Yes | 797 | 24.54% | 51 | 31.48% | 0.046 |
No | 2451 | 75.46% | 111 | 68.52% | |