Patient characteristics (treated and observed patient groups)
| Enrolled (n=33) N (%) or median (range) | Not enrolled (n=29) N (%) or median (range) | P value | |
| Sex | |||
| Male | 16 (48%) | 15 (52%) | |
| Female | 17 (52%) | 14 (48%) | 1.0 |
| Age (years) | |||
| 59 (20–77) | 73 (48–91) | 0.0002 | |
| Involved eye | |||
| Right | 19 (58%) | 15 (52%) | 0.80 |
| Left | 14 (42%) | 14 (48%) | |
| Tumour location | |||
| Choroid only | 24 (73%) | 17 (59%) | |
| Ciliary body ±choroid/iris | 7 (21%) | 12 (41%) | |
| Iris only | 2 (6%) | 0 | 0.12 |
| Diameter of tumour base (mm) | |||
| 13.0 (3.0–24.0) | 16.0 (2.4–25.0) | 0.04 | |
| Initial treatment | |||
| Enucleation | 11 (33%) | 17 (59%) | |
| Plaque brachytherapy | 20 (61%) | 12 (41%) | |
| Local resection | 2 (6%) | 0 | 0.08 |