Table 2.
Clinicopathological characteristics of the included tumours
| Women (n = 697) | Men (n = 644) | Total (n = 1341) | P‐value | |
|---|---|---|---|---|
| Mean ± SD Breslow index | 2·10 ± 3·27 | 2·47 ± 2·81 | 2·28 ± 3·06 | < 0·001 |
| Ulceration | < 0·001 | |||
| Absent | 508 (80·6) | 437 (72·2) | 945 (76·5) | |
| Present | 122 (19·4) | 168 (27·8) | 290 (23·5) | |
| Missing | 67 | 39 | 106 | |
| Mean ± SD mitotic index | 2·18 ± 3·95 | 2·53 ± 4·59 | 2·35 ± 4·28 | 0·122 |
| Missing | 133 | 106 | 239 | |
| Location | < 0·001 | |||
| Trunk | 248 (38·2) | 330 (54·1) | 578 (45·9) | |
| Lower limbs | 184 (28·3) | 78 (12·8) | 262 (20·8) | |
| Head and neck | 69 (10·6) | 95 (15·6) | 164 (13·0) | |
| Upper limbs | 78 (12·0) | 54 (8·9) | 132 (10·5) | |
| Acral | 50 (7·7) | 48 (7·9) | 98 (7·8) | |
| Mucosa | 18 (2·8) | 5 (0·8) | 23 (1·8) | |
| Other | 3 (0·5) | 0 (0·0) | 3 (0·2) | |
| Missing | 47 | 34 | 81 | |
| Histological subtype | 0·003 | |||
| Superficial spreading | 459 (66·8) | 397 (62·5) | 856 (64·8) | |
| Nodular | 99 (14·4) | 105 (16·5) | 204 (15·4) | |
| Acral lentiginous | 33 (4·8) | 45 (7·1) | 78 (5·9) | |
| Lentiginous malignant | 27 (3·9) | 46 (7·2) | 73 (5·5) | |
| Other | 69 (10·0) | 42 (6·6) | 111 (8·4) | |
| Missing | 10 | 9 | 19 |
Data are n (%) unless otherwise indicated.