Table 1.
Baseline characteristics of the 6,377 long-term survivors of nasopharyngeal carcinoma
| Characteristic | No. of patients (%) (n=6,377) |
|---|---|
| Age (yr) | |
| ≤ 50 | 3,377 (53.0) |
| > 50 | 3,000 (47.0) |
| Sex | |
| Male | 4,728 (74.1) |
| Female | 1,649 (25.9) |
| T categorya) | |
| T1 | 982 (15.4) |
| T2 | 1,204 (18.9) |
| T3 | 3,133 (49.1) |
| T4 | 1,057 (16.6) |
| N categorya) | |
| N0 | 1,127 (17.7) |
| N1 | 2,865 (44.9) |
| N2 | 1,850 (29.0) |
| N3 | 535 (8.4) |
| Overall stagea) | |
| I | 347 (5.4) |
| II | 1,055 (16.6) |
| III | 3,433 (53.8) |
| IV | 1,542 (24.2) |
| Smoking | |
| Yes | 2,044 (32.1) |
| No | 4,333 (67.9) |
| Drinking | |
| Yes | 731 (11.5) |
| No | 5,646 (88.5) |
| Chemotherapy | |
| Yes | 4,596 (72.1) |
| No | 1,781 (27.9) |
| Irradiation dose to primary site (Gy) | |
| ≥ 70 | 3,243 (50.9) |
| < 70 | 3,134 (49.1) |
| Re-irradiation | |
| Yes | 155 (2.4) |
| No | 6,222 (97.6) |
a)
According to the 7th edition of the AJCC/UICC staging system.