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Table 1 Clinical characteristics of the 385 patients with nasopharyngeal carcinoma (NPC) who were treated with intensity-modulated radiotherapy (IMRT)
| Characteristic | No. of patients (%) |
|---|---|
| Sex | |
| Man | 281 (73.0) |
| Woman | 104 (27.0) |
| Age (years) | |
| ≤ 45 | 235 (61.0) |
| > 45 | 150 (39.0) |
| Histological type | |
| WHO type I | 3 (0.8) |
| WHO type II/III | 382 (99.2) |
| T categorya | |
| T1 | 73 (19.0) |
| T2 | 75 (19.5) |
| T3 | 168 (43.6) |
| T4 | 69 (17.9) |
| N categorya | |
| N0 | 53 (13.8) |
| N1 | 244 (63.4) |
| N2 | 62 (16.1) |
| N3 | 26 (6.7) |
| Clinical stagea | |
| I | 23 (6.0) |
| II | 98 (25.4) |
| III | 172 (44.7) |
| IVB | 92 (23.9) |
| Chemotherapy | |
| No | 55 (14.3) |
| Yes | 330 (85.7) |
