Table 1.
Patient characteristics
| Training cohort (N=82) | Validation cohort (N=97) | |
|---|---|---|
| Gender, N (%) | ||
| Male | 49 (59.8) | 64 (66.0) |
| Female | 33 (40.2) | 33 (34.0) |
| Age at diagnosis (years) | ||
| Mean±SD | 58.9±14.4 | 63.8±16.5 |
| Histological type, N (%) | ||
| SSM | 26 (31.7) | 38 (39.2) |
| NM | 56 (68.2) | 59 (60.8) |
| Thickness (mm), N (%) | ||
| ≤2 | 32 (39.0) | 30 (30.9) |
| >2 | 50 (61.0) | 67 (69.1) |
| Ulceration, N (%) | ||
| Present | 42 (51.2) | 51 (52.6) |
| Absent | 40 (48.8) | 46 (47.4) |
| Mitoses per mm2, N (%) | ||
| 0 | 5 (6.1) | 8 (8.2) |
| ≥1 | 75 (91.5) | 89 (91.8) |
| Unknown | 2 (2.4) | 0 (0.0) |
| Stage, N (%) | ||
| Stage I | 19 (23.2) | 18 (18.5) |
| Stage II | 44 (53.6) | 39 (40.2) |
| Stage III | 19 (23.2) | 38 (39.2) |
| Stage IV | 0 (0.0) | 2 (2.1) |
| LN status, N (%) | ||
| Positive | 16 (19.5) | 33 (34.0) |
| Negative | 66 (80.5) | 64 (66.0) |
Abbreviations: LN, lymph node; NM, nodular melanoma; SSM, superficial spreading melanoma.