Table 1. Clinical characteristics of 408 patients with metastatic nasopharyngeal carcinoma (NPC).
| Characteristic | Number of patients | Percentage (%) |
| Sex | ||
| Male | 342 | 83.8 |
| Female | 66 | 16.2 |
| Pathologic type | ||
| WHO I/II | 17 | 4.2 |
| WHO III | 391 | 95.8 |
| T classificationa | ||
| T1-2 | 157 | 38.5 |
| T3-4 | 251 | 61.5 |
| N classificationa | ||
| N0-1 | 144 | 35.3 |
| N2-3 | 264 | 64.7 |
| Chemotherapy (n=345) | ||
| Cisplatin-based | 293 | 84.9 |
| Non-Cisplatin | 52 | 15.1 |
| Radiotherapy (n=214) | ||
| 2D-CRT | 194 | 90.7 |
| IMRT | 20 | 9.3 |
WHO, World Health Organization; 2D-CRT, two-dimensional conventional radiotherapy; IMRT, intensity-modulated radiotherapy. aT and N classifications were performed according to the American Joint Committee on Cancer (AJCC) staging system (6th edition).