Table 2. Characteristics of cutaneous melanoma cases by age group (RAMC, 2002–2018).
| Characteristic | <50 years | ≥ 50 years | p value * |
|---|---|---|---|
| Anatomic site, n (%) | |||
| Head & neck | 297 (9.1) | 1,149 (16.9) | 0.000 |
| Trunk | 1,058 (32.6) | 1,818 (26.7) | |
| Upper extremities | 430 (13.2) | 864 (12.7) | |
| Lower extremities | 717 (22.1) | 1,323 (19.4) | |
| n.s. | 749 (23.0) | 1,654 (24.3) | |
| Histology, n (%) | |||
| Superficial spreading | 1,100 (33.8) | 1,711 (25.1) | 0.000 |
| Nodular | 471 (14.5) | 1,114 (16.4) | |
| Lentigo maligna | 70 (2.2) | 500 (7.3) | |
| Acral lentiginous | 62 (1.9) | 267 (3.9) | |
| Other specified | 114 (3.5) | 280 (4.1) | |
| n.s. | 1,434 (44.1) | 2,936 (43.2) | |
| Breslow depth, n (%) | |||
| ≤1 mm | 789 (27.3) | 1,190 (20.0) | 0.000 |
| 1.01–2.0 mm | 373 (12.9) | 657 (11.1) | |
| 2.01–4.0 mm | 235 (8.1) | 607 (10.2) | |
| > 4.0 mm | 179 (6.2) | 472 (7.9) | |
| n.s. | 1,317 (45.5) | 3,020 (50.8) | |
| Clark level, n (%) | |||
| I | 350 (10.8) | 845 (12.4) | 0.000 |
| II | 489 (15.0) | 729 (10.7) | |
| III | 544 (16.7) | 972 (14.3) | |
| IV | 366 (11.3) | 933 (13.7) | |
| V | 71 (2.2) | 180 (2.6) | |
| n.s. | 1,431 (44.0) | 3,149 (46.3) | |
| Region of residence | |||
| Centro | 2,588 (79.6) | 5,651 (83.0) | 0.000 |
| Cuyo | 198 (6.1) | 507 (7.4) | |
| North West | 132 (4.1) | 236 (3.5) | |
| North East | 111 (3.4) | 141 (2.1) | |
| Patagonia | 222 (6.8) | 273 (4.0) | |
*
p-value from testing the difference between age groups. n.s: not specified/no data.