Table 1.
Patient and disease characteristics
| Patients | ||
|---|---|---|
| Characteristics | No. | % |
| Age, years | ||
| Median | 46 | |
| Range | 11-72 | |
| Sex | ||
| Male | 104 | 75.4 |
| Female | 34 | 24.6 |
| EBV infection | ||
| < 1000 copy | 116 | 84.1 |
| ≥1000 copy | 22 | 15.9 |
| Tumor factors | ||
| WHO histology | ||
| I | 2 | 1.5 |
| II | 99 | 71.7 |
| III | 37 | 26.8 |
| AJCC T category | ||
| T1-2 | 100 | 72.5 |
| T3-4 | 38 | 27.5 |
| AJCC N category | ||
| N0-1 | 78 | 56.5 |
| N2-3 | 60 | 43.5 |
| AJCC stage | ||
| I | 6 | 4.4 |
| II | 19 | 13.8 |
| III | 64 | 46.4 |
| IVa | 39 | 28.3 |
| IVb | 10 | 7.3 |
| Treatment factors | ||
| IMRT alone | 25 | 18.1 |
| IMRT + chemotherapy | 113 | 81.9 |
| Chemotherapy manner | ||
| Neoadjuvant chemotherapy | 43 | 31.2 |
| Concurrent chemotherapy | 18 | 13.0 |
| Concurrent +Adjuvant | 52 | 37.7 |
WHO = World Health Organization.
AJCC = American joint committee on carcinoma
Concurrent +Adjuvant = Concurrent +Adjuvant chemotherapy