| Outcome | No betel nut chewing | Betel nut chewing | Total | P value | ||
| N | % | N | % | |||
| Complete response | 36 | 81.81818 | 6 | 85.71429 | 42 | >0.05 |
| Residual disease | 8 | 18.18182 | 1 | 14.28571 | 9 | |
| Total | 44 | 100 | 7 | 100 | 51 | |
| Fishers-Exact-Test (Chi square) | 1 | |||||