Table 6. Characteristics and treatment factors for the entire series of 527 patients.
| Characteristics | No. of patients | % |
|---|---|---|
| Sex | ||
| Male | 394 | 74.8 |
| Female | 133 | 25.2 |
| Age | ||
| >44 years | 255 | 48.4 |
| ≤ 44 years | 272 | 51.6 |
| Histological type | ||
| Non-keratinizing carcinoma | 523 | 99.2 |
| Keratinizing squamous carcinoma | 4 | 0.8 |
| Tumor stage | ||
| T1 | 62 | 11.8 |
| T2 | 156 | 29.6 |
| T3 | 174 | 33.0 |
| T4 | 135 | 25.6 |
| Node stage | ||
| N0 | 60 | 11.4 |
| N1 | 184 | 34.9 |
| N2 | 258 | 49.0 |
| N3 | 25 | 4.7 |
| Clinical stage | ||
| I | 18 | 3.4 |
| II | 111 | 21.1 |
| III | 245 | 46.5 |
| IVa-b | 153 | 29.0 |
| Chemotherapy | ||
| Yes | 468 | 88.8 |
| No | 59 | 11.2 |
| Concurrent chemotherapy | ||
| Yes | 450 | 85.4 |
| No | 77 | 14.6 |
| Neoadjuvant chemotherapy | ||
| Yes | 94 | 17.8 |
| No | 433 | 82.2 |
| Adjuvant chemotherapy | ||
| Yes | 310 | 58.8 |
| No | 217 | 41.2 |