| Classification of D’Amico | Resistance to castration | p | OR (IC95%) | |
| No | Yes | |||
| Low risk cancer | 2 (6.9) | 2 (9.1) | 0.818 | 1 |
| Intermediate risk cancer | 7 (24.1) | 3 (13.6) | 0.021 | 2.02 (1.45 - 3.90) |
| High risk cancer | 8 (27.6) | 5 (22.7) | 0.041 | 2.95 (1.36 - 4.69) |
| Metastatic cancer | 12 (41.4) | 12 (54.5) | 0.019 | 5.88 (1.62 - 7.99) |