Demographics of the 134 Patients Included in the Study
| Demographic | Characteristic | n |
| Age (y)* | <40 | 13 (9.7%) |
| 41–60 | 72 (53.73%) | |
| >60 | 49 (36.56%) | |
| Sex | Male | 98 (73%) |
| Female | 36 (27%) | |
| Site of tumor | Oropharynx | 72 (53.7%) |
| Oral cavity | 23 (17.2%) | |
| Larynx | 14 (10.44%) | |
| Nasopharynx | 11 (8.2%) | |
| Other | 14 (10.44%) | |
| HPV status | Positive | 55 (41.04%) |
| Negative | 13 (9.7%) | |
| Not available | 14 (49.26%) | |
| Stage | I | 9 (6.7%) |
| II | 12 (8.95%) | |
| III | 19 (14.17%) | |
| IV | 82 (61.2%) | |
| Unknown primary | 8 (5.79%) | |
| Undetermined stage | 4 (2.98%) | |
| Primary treatment | Radiotherapy | 7 (5.2%) |
| Chemoradiotherapy | 75 (56%) | |
| Surgery | 52 (38.8%) |
↵* Mean ± SD, 57 ± 12 y.
HPV = human papillomavirus.