Table 1.
Patient and tumor characteristics.
| Variable | No. patients | % |
|---|---|---|
| Age | Mean 56, | |
| Continuous | range 32-77 | |
| Gender | ||
| Male | 32 | 82 |
| Female | 7 | 18 |
| Active smoking* | ||
| Yes | 30 | 77 |
| No | 9 | 13 |
| Alcohol use | ||
| Heavy** | 11 | 28 |
| Others | 28 | 72 |
| KPS | ||
| 80-100 | 25 | 64 |
| 60-70 | 14 | 36 |
| Primary site | ||
| Oral cavity | 2 | 5 |
| Oropharynx | 25 | 64 |
| Larynx | 6 | 15 |
| Hypopharynx | 3 | 8 |
| Unknown primary | 3 | 8 |
| T stage | ||
| T0, 1, 2 | 25 | 64 |
| T3, 4 | 14 | 36 |
| N stage | ||
| N0/N1 | 16 | 41 |
| N2 | 19 | 49 |
| N3 | 4 | 10 |
| Chemo regimen | ||
| CDDP-based | 33 | 85 |
| Others | 6 | 15 |
| Post RT neck dissection | ||
| Yes | 5 | 13% |
| No | 34 | 87% |
*: currently smoking or smoking history within one year.
**: self reported active heavy alcohol drinking or more than one 6-pack of beers per day.