Table 1.
Patient Demographics and Tumor Characteristics
| Characteristics | OBS (n=96) | CLND (n=375) | p Value |
|---|---|---|---|
| Age, y, median (range) | 56 (7-95) | 53 (4-98) | |
| Age, y, mean ± SD | 57.6 ± 17.9 | 52.9 ± 18.4 | 0.026 |
| Age, y, n (%) | |||
| < 65 | 57 (59.4) | 276 (70.9) | 0.030 |
| ≥ 65 | 39 (40.6) | 109 (29.1) | |
| Sex, male, n (%) | 64 (66.7) | 220 (58.7) | 0.153 |
| Breslow thickness, mean mm ± SD | 3.1 ± 2.7 | 3.0 ± 3.6 | 0.604 |
| Breslow thickness, mm, n (%) | 0.606 | ||
| <1 | 11 (1.5) | 39 (10.4) | |
| 1-3.99 | 59 (61.5) | 252 (67.2) | |
| ≥ 4 | 25 (26.0) | 77 (20.5) | |
| Unknown | 1 (1.0) | 7 (1.9) | |
| Clark level, n (%) | 0.783 | ||
| I/II | 3 (3.1) | 13 (3.5) | |
| III | 17(17.7) | 60 (16.0) | |
| IV | 58 (60.4) | 248 (66.1) | |
| V | 14 (14.6) | 39 (10.4) | |
| Unknown | 4 (4.2) | 15 (4.0) | |
| Primary tumor site, n (%) | 0.394 | ||
| Head/neck | 19 (19.8) | 57 (15.2) | |
| Upper extremity | 11 (11.5) | 60 (16.0) | |
| Trunk | 44 (45.8) | 150 (40.0) | |
| Lower extremity | 22 (22.9) | 108 (28.8) | |
| Ulceration, n (%) | 0.133 | ||
| Present | 34 (35.4) | 101 (26.9) | |
| Absent | 61 (63.5) | 260 (69.3) | |
| Unknown | 1 (1.0) | 14 (3.7) |
OBS, observation; CLND, completion lymph node dissection.