Table 2 Distribution of patient demographics and clinical characteristics before treatment
Characteristics | Patients | |
|---|---|---|
No. | % | |
Age, years | ||
 Median | 43 | |
 Range | 19-59 | |
Sex | ||
 Male | 43 | 72.9 |
 Female | 16 | 27.1 |
Histology, WHO typea | ||
 III | 59 | 100.0 |
EBV DNA copy no. (pre-treatment) | ||
 Low (≤4000 copies/ml) | 32 | 54.2 |
 High (>4000 copies/ml) | 22 | 37.3 |
 NA | 5 | 8.5 |
T stageb | ||
 2 | 4 | 6.8 |
 3 | 30 | 50.8 |
 4 | 25 | 42.4 |
N stageb | ||
 0 | 3 | 5.1 |
 1 | 26 | 44.1 |
 2 | 23 | 39.0 |
 3 | 7 | 11.9 |
Clinical stageb,c | ||
 III | 29 | 49.2 |
 IVa | 23 | 39.0 |
 IVb | 7 | 11.9 |
ECOG score | ||
 0 | 3 | 5.1 |
 1 | 56 | 94.9 |