| Factor | Group | Overall |
| n |
| 15 |
| Age (years) |
| 71.7 ± 8.5 |
| Sex (n) | Male | 12 |
|
| Female | 3 |
| site of primary | Tongue | 9 |
|
| Upper iaw | 1 |
|
| Lower jaw | 4 |
|
| Buccal mucosa | 1 |
| T classification | T1 | 3 |
|
| T2 | 7 |
|
| T3 | 5 |
|
| T4 | 0 |
| N classification | N0 | 7 |
|
| N1 | 5 |
|
| N2 | 2 |
|
| N3 | 1 |
| Stage (n) | I | 2 |
|
| II | 4 |
|
| III | 6 |
|
| IV | 3 |
| Observation period |
| 583.5 ± 336.1 |