Baseline Tumor Characteristics
| Variable | No. of patients | % |
|---|---|---|
| Melanoma site | ||
| Upper limbs | 166 | 12.64 |
| Lower limbs | 450 | 34.27 |
| Trunk | 605 | 46.08 |
| Head and neck | 84 | 6.40 |
| Other | 8 | 0.61 |
| Clark level | ||
| I | 9 | 0.69 |
| II | 110 | 8.38 |
| II | 492 | 37.46 |
| IV | 613 | 46.69 |
| V | 59 | 4.49 |
| Unknown | 30 | 2.29 |
| Breslow thickness (mm) | ||
| ≤1 | 361 | 27.49 |
| >1 and ≤2 | 485 | 36.94 |
| >2 and ≤4 | 303 | 23.08 |
| >4 | 130 | 9.90 |
| Unknown | 34 | 2.59 |
| Regression | ||
| Yes | 386 | 29.40 |
| No | 734 | 55.90 |
| Unknown | 193 | 14.70 |
| Ulceration | ||
| Yes | 366 | 27.88 |
| No | 857 | 65.27 |
| Unknown | 90 | 6.85 |