Table 1. Clinical characteristics of 717 patients with nasopharyngeal carcinoma (NPC).
| Characteristic | No. of cases (%) |
| Gender | |
| Male | 554 (77.3) |
| Female | 163 (22.7) |
| Age (years) | |
| ≤50 | 529 (73.8) |
| >50 | 188 (26.2) |
| Pathologic classification | |
| WHO I | 5 (0.7) |
| WHO II | 53 (7.4) |
| WHO III | 648 (90.4) |
| BSCC | 11 (1.5) |
| Baseline LDH (IU/L) | |
| <245 | 678 (93.6) |
| ≥245 | 39 (5.4) |
| GTV-p (mL) | |
| <26.8 | 395 (54.6) |
| ≥26.8 | 322 (44.5) |
| T categorya | |
| T1 | 170 (23.5) |
| T2 | 131 (18.1) |
| T3 | 254 (35.1) |
| T4 | 162 (22.4) |
| N categorya | |
| N0-1 | 567 (78.3) |
| N2-3 | 150 (20.7) |
| Clinical stagea | |
| I | 74 (10.2) |
| II | 169 (23.3) |
| III | 272 (37.6) |
| IVA | 155 (21.4) |
| IVB | 47 (6.5) |
WHO, World Health Organization; BSCC, basaloid squamous cell carcinoma; GTV-p, primary gross tumor volume; LDH, lactate dehydrogenase. aAccording to the 7th American Joint Commission on Cancer/Union for International Cancer Control staging system.