TABLE 1.
Patient characteristics.
| All n = 2668 | MSLT‐I n = 407 (15.3%) | SJCI n = 2261 (84.7%) | |
|---|---|---|---|
| Age (years) | |||
| Mean (SD) | 54.7 (15.9) | 52.9 (13.3) | 55 (16.3) |
| Sex, n (%) | |||
| Female | 1075 (40.3) | 168 (41.3) | 907 (40.1) |
| Male | 1593 (59.7) | 239 (58.7) | 1354 (59.9) |
| Ulceration, n (%) | |||
| Absent | 2096 (78.6) | 278 (68.3) | 1818 (80.4) |
| Present | 434 (16.3) | 114 (28.0) | 320 (14.2) |
| Unknown | 138 (5.2) | 15 (3.7) | 123 (5.4) |
| Primary site, n (%) | |||
| Extremity | 1129 (42.3) | 199 (48.9) | 930 (41.1) |
| Head/neck | 534 (20.0) | 74 (18.2) | 460 (20.3) |
| Trunk | 1005 (37.7) | 134 (32.9) | 871 (38.5) |
| Breslow thickness (mm) | |||
| Median (Q1, Q3) | 1.2 (0.8, 1.9) | 1.7 (1.3, 2.6) | 1.0 (0.7, 1.7) |
| AJCC stage, n (%) | |||
| IA | 1017 (40.0) | 13 (3.3) | 1004 (47.0) |
| IB | 772 (31.0) | 181 (46.0) | 591 (28.0) |
| IIA | 396 (16.0) | 94 (24.0) | 302 (14.0) |
| IIB | 259 (10.0) | 86 (22.0) | 173 (8.1) |
| IIC | 78 (3.1) | 18 (4.6) | 60 (2.8) |
| Unknown | 146 | 15 | 131 |
| Follow‐up (years) | |||
| Median (Q1, Q3) | 9.2 (6.0, 11.6) | 10.0 (7.1, 10.0) | 8.9 (5.9, 12.3) |
| Maximum | 28.2 | 14.6 | 28.2 |
| Total patient years | 25,080 | 3375 | 21,705 |
Abbreviations: MSLT‐I, Multicenter Selective Lymphadenectomy Trial‐I; SD, Standard Deviation; SJCI, Saint John's Cancer Institute.