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| Characteristic | Number | |
| Patient sex | ||
| Male | 97 (82.9%) | |
| Female | 20 (17.1%) | |
| Patient age (y) (± SD) | 61.9 ± 9.1 | |
| Tumor stage | ||
| Stage I | 2 (1.7% ) | |
| Stage II | 10 (8.5% ) | |
| Stage III | 14 (12.0%) | |
| Stage IV | 74 (63.2%) | |
| unknown | 17 (14.6%) | |
| T category | ||
| T1 | 7 (6.0%) | |
| T2 | 14 (12.0%) | |
| T3 | 26 (22.2%) | |
| T4 | 55 (27.0%) | |
| unknown | 15 (12.8%) | |
| N category | ||
| N0 | 41 (35.0%) | |
| N1 | 12 (10.3%) | |
| N2 | 41 (35.0%) | |
| N3 | 2 (1.7%) | |
| unknown | 21 (18.0%) | |
| Vital status | ||
| alive | 74 (63.2%) | |
| dead | 43 (36.8%) | |
