Multivariable analysis of metastasis-free and overall survival
| Survival | HR | 95% CI | P value |
| Metastasis-free survival | |||
| Observed versus treated | 1.27 | 0.56 to 2.90 | 0.56 |
| Age (10-year increase) | 1.35 | 0.98 to 1.87 | 0.07 |
| Initial treatment (enucleation vs other) | 3.83 | 1.79 to 8.18 | <0.001 |
| Overall survival | |||
| Observed versus treated | 1.04 | 0.44 to 2.47 | 0.92 |
| Age (10-year increase) | 1.59 | 1.10 to 2.30 | 0.013 |
| Tumour basal diameter (1 mm increase) | 1.18 | 1.07 to 1.31 | 0.001 |