Table 1: Characteristics of patients.
| Characteristics | No. of patients (% of total) | ||
| N0 | N (+) | ||
| Sex | Male | 84 (59) | 13 (48) |
| Female | 58 (41) | 14 (52) | |
| Age (y) | Range | 28-96 | 33-90 |
| Mean | 68.5 | 67.3 | |
| Primary site | Tongue | 79 (56) | 14 (52) |
| Mandibular gingiva | 31 (22) | 5 (19) | |
| Maxillary gingiva | 12 (8) | 1 (4) | |
| Floor of mouth | 9 (6) | 4 (14) | |
| Buccal mucosa | 9 (6) | 2 (7) | |
| Soft palate | 1 (1) | 1 (4) | |
| Lip | 1 (1) | 0 | |
| Total | 142 (100) | 27 (100) | |