Table 1: Demographic Characteristics and Clinical Variables.
| Level | N (%) | |
| Gender | Male | 371 (69%) |
| Female | 163 (31%) | |
| Stage | 1 | 64 (12%) |
| 2 | 82 (15%) | |
| 3 | 79 (15%) | |
| 4 | 309 (58%) | |
| T stage | 1 | 111 (21%) |
| 2 | 162 (30%) | |
| 3 | 76 (14%) | |
| 4 | 185 (35%) | |
| N stage | 0 | 246 (46%) |
| 1 | 69 (13%) | |
| 2 | 202 (38%) | |
| 3 | 17 (3%) | |
| M stage | 0 | 522 (98%) |
| 1 | 12 (2%) | |
| Disease Site | Larynx | 81 (15%) |
| Oral Cavity | 273 (51%) | |
| Oropharynx | 158 (30%) | |
| Hypopharynx | 22 (4%) | |
| Initial Treatment | Surgery | 317 (59%) |
| Chemoradiation | 140 (26%) | |
| Radiation | 24 (4%) | |
| Palliation/missing treatment | 39 (7%) | |
| Chemotherapy | 14 (3%) | |
| ACE Comorbidities Score, n = 532 | none | 133 (25%) |
| mild | 254 (48%) | |
| moderate | 95 (18%) | |
| severe | 50 (9%) | |
| HPV status, n = 401 | negative | 258 (64%) |
| positive | 143 (36%) | |
| Drinker, n = 506 | never | 63 (12%) |
| current | 320 (63%) | |
| former (quit > 12 months) | 123 (24%) | |
| Smoker (cigarettes), n = 509 | never | 116 (23%) |
| current | 225 (44%) | |
| former (quit > 12 months) | 168 (33%) |