Table 2 Univariate analysis (10-year Second Tumor-Free Survival)
Variables | No. of patients (%) | all sites | pelvis | pelvis/abdomen | ||||
|---|---|---|---|---|---|---|---|---|
STFS | p | STFS | p | STFS | p | |||
Radiotherapy technique | 3D-CRT | 538 (21.3) | 85.8 | .627 | 94.0 | .033 | 92.2 | .125 |
IMRT/VMAT | 1988 (78.7) | 84.5 | 89.3 | 87.5 | ||||
Prophylactic nodal irradiation | no | 1232 (48.8) | 88.1 | .770 | 94.4 | .092 | 92.6 | .064 |
yes | 1294 (51.2) | 84.9 | 90.6 | 89.1 | ||||
Androgen deprivation therapy | no | 837 (33.1) | 92.8 | .999 | 93.1 | .546 | 92.0 | .345 |
yes | 1689 (66.9) | 83.8 | 91.9 | 89.9 | ||||
Age, years | ≤ 66 | 688 (27.2) | 85.3 | .352 | 90.5 | .981 | 89.6 | .374 |
> 66 | 1838 (72.8) | 86.0 | 93.5 | 91.4 | ||||
Combination of radiotherapy technique and irradiated volumes | 3D-CRT without PNI | 326 (12.9) | 91.0 | .887 | 96.6 | .044 | 95.3 | .140 |
IMRT/VMAT without PNI | 906 (35.9) | 78.9 | 89.9 | 87.8 | ||||
3D-CRT with PNI | 212 (8.4) | 85.6 | 93.7 | 91.1 | ||||
IMRT/VMAT with PNI | 1082 (42.8) | 86.6 | 87.6 | 86.3 | ||||