Table 3. Summary of cohort characteristics in patients with oropharyngeal squamous cell carcinoma.
| P16+ OPSCC | P16– OPSCC | P value (Fisher's test) | |
|---|---|---|---|
| Age Median = 60.7 | 0.16 | ||
| < 20 | 0 | 0 | |
| 20–40 | 1 | 1 | |
| 40–60 | 7 | 5 | |
| > 60 | 6 | 11 | |
| Age > 60 | 6 | 12 | |
| Age < 60 | 8 | 5 | |
| Gender, | 0.44 | ||
| Male | 8 | 13 | |
| Female | 6 | 4 | |
| Smoking, | 0.06 | ||
| Yes | 5 | 12 | |
| No | 9 | 4 | |
| Not available (n =1) | |||
| Alcohol | 0.42 | ||
| Yes | 3 | 6 | |
| No | 11 | 8 | |
| Not available (n =3) | |||
| Ethnic | 0.41 | ||
| Chinese | 12 | 12 | |
| Others | 2 | 5 | |
| T stage | 1.00 | ||
| T1 | 2 | 2 | |
| T2 | 8 | 6 | |
| T3 | 1 | 0 | |
| T4 | 3 | 9 | |
| N stage | 0.70 | ||
| N0 | 3 | 5 | |
| N1 | 4 | 2 | |
| N2 | 4 | 8 | |
| N3 | 3 | 2 | |
| Definitive treatment | 0.48 | ||
| Surgery +/– adjuvant therapy | 7 | 11 | |
| Radiation/ChemoRT | 7 | 6 | |
| Median follow up | 55.8 month | 19.1 month | |
| Overall survival (OS) N3-year OS |
93% | 59% | 0.022 (0.21, 0.05–0.84) |