Table 1.
Clinical characteristics of NPC patients (n=543)
| Characteristic | N (%) |
|---|---|
| Sex | |
| Female | 138 (25.4%) |
| Male | 405 (74.6%) |
| Age (years) | |
| <45 | 252 (46.4%) |
| ≥45 | 291 (53.6%) |
| Smoking | |
| Yes | 322 (49.3%) |
| No | 221 (40.7%) |
| WHO pathologic type1 | |
| Keratinizing carcinoma | 3 (0.6%) |
| Differentiated non-keratinizing carcinoma | 34 (6.3%) |
| Undifferentiated non-keratinizing carcinoma | 507 (93.1%) |
| Overall stage2 | |
| I | 32 (5.9%) |
| II | 54 (9.9%) |
| III | 186 (34.3%) |
| IV | 271 (49.9%) |
| Tumor stage2 | |
| T1 | 99 (18.2%) |
| T2 | 92 (16.9%) |
| T3 | 109 (20.1%) |
| T4 | 243 (44.8%) |
| Node stage2 | |
| N0 | 59 (10.9%) |
| N1 | 144 (26.5%) |
| N2 | 295 (54.3%) |
| N3 | 45 (8.3%) |
1 Pathologic type according to the 2005 World Health Organization (WHO) classification of tumors.
2 According to the 7th edition of the AJCC staging system.