Subject Demographics and Clinical Characteristics (n = 120)
| Characteristic | n |
| Sex | |
| Male | 108 (90) |
| Female | 12 (10) |
| Age at diagnosis (y) | |
| 40 | 1 (1) |
| 40–49 | 19 (16) |
| 50–59 | 46 (38) |
| 60–69 | 37 (31) |
| 70–79 | 12 (10) |
| 80+ | 5 (4) |
| Clinical tumor classification | |
| T1 | 30 (25) |
| T2 | 52 (43) |
| T3 | 17 (14) |
| T4 | 13 (11) |
| Unknown | 8 (7) |
| Tumor subsite | |
| Base of tongue | 54 (45) |
| Tonsil | 53 (44) |
| Hypopharynx | 2 (2) |
| Supraglottic larynx | 3 (2) |
| Unknown primary | 8 (7) |
| Clinical lymph node classification | |
| N0 | 1 (1)* |
| N1 | 15 (12) |
| N2a | 14 (11) |
| N2b | 50 (42) |
| N2c | 37 (31) |
| N3 | 2 (27) |
| Unknown | 1 (1) |
| HPV status† | |
| Positive | 73 (83) |
| Negative | 15 (17) |
| Testing not performed | 32 |
| P16 status† | |
| Positive | 96 (91) |
| Negative | 9 (9) |
| Testing not performed | 15 |
↵* Numbers do not total 100% due to rounding.
↵† Both HPV and p16 information was available for n = 77 patients. Eight patients were HPV-negative and p16-negative, 5 patients were HPV-negative while being p16-positive, and 64 patients were HPV-positive and p16-positive.
Data in parentheses are percentages.