Table 2.
Clinico-pathological features of patients with p16-positive oropharyngeal cancer.
| Total | ctDNA | |||
|---|---|---|---|---|
| Positive | Negative | |||
| 25 | 14 | 11 | ||
| Sex | ||||
| Male | 22 | 13 | 9 | n.s.* |
| Female | 3 | 1 | 2 | |
| Age | ||||
| ≥ 65 years | 17 | 9 | 8 | n.s.* |
| < 65 years | 8 | 5 | 3 | |
| Smoke | ||||
| ≥ 10 pack-years | 15 | 8 | 7 | n.s.* |
| < 10 pack-years | 10 | 6 | 4 | |
| Alcohol | ||||
| Habitual | 14 | 8 | 6 | n.s.* |
| Chance/none | 11 | 6 | 5 | |
| T | ||||
| T1 | 9 | 7 | 2 | n.s.** |
| T2 | 11 | 4 | 7 | |
| T4 | 5 | 3 | 2 | |
| N | ||||
| N0 | 2 | 1 | 1 | n.s.** |
| N1 | 19 | 9 | 10 | |
| N2 | 4 | 4 | 0 | |
| Stage | ||||
| I | 19 | 10 | 9 | n.s.** |
| II | 1 | 1 | 0 | |
| III | 3 | 3 | 0 | |
| IV | 2 | 0 | 2 | |
ctDNA circulating tumor DNA, n.s. not significant.
*Fisher’s exact test; **Kruskal–Wallis test.