Table 1.
Patient and tumor characteristics
| Characteristic | N or mean | % or range |
|---|---|---|
| Age, year (mean, range) | ||
| Men | 64 | (52–83) |
| Women | 63 | (50–79) |
| Body mass index (mean, range) | 24.3 | (18.0–32.3) |
| Tumor subsite location in oral cavity | ||
| Floor of mouth | 15 | 50 |
| Tongue, ant. 2/3 | 9 | 30 |
| Inferior tongue | 2 | 7 |
| Buccal | 1 | 3 |
| Hard palate | 1 | 3 |
| Gingiva | 1 | 3 |
| Retromolar trigone | 1 | 3 |
| Tumor crossing midline | ||
| Yes | 8 | 27 |
| No | 22 | 73 |
| Tumor stage | ||
| T1 | 18 | 60 |
| T2 | 12 | 40 |
| Operation time (min) for SNB neck procedure (mean, range) | 39 | (15–115) |
| Pathology | ||
| −SN | 88 | 94 |
| +SN | 6 | 6 |
| Macrometastasis (>2 mm) | 3 | 50 |
| Micrometastasis (≥0.2 mm, ≤2 mm) | 3 | 50 |
| Isolated tumor cells (<0.2 mm) | 0 | 0 |
| pN staging | ||
| pN0 | 24 | 80 |
| pN1 | 6 | 20 |