Table 2.

Demographics of the enrolled patients.

	Number of patients (%)
Age
≤ 50 yrs	96 (56.1%)
> 50 yrs	75 (43.9%)
Sex
Female	42 (24.6%)
Male	129 (75.4%)
EBV-DNA level
≤ 4,000 IU/mL	156 (91.2%)
> 4,000 IU/mL	15 (8.8%)
T stage
T1	0 (0%)
T2	0 (0%)
T3	76 (44.4%)
T4	95(55.6%)
N stage
N0	5 (2.9%)
N1	46 (26.9%)
N2	77 (45.0%)
N3	43 (25.1%)
Clinical stage
I	0 (0%)
II	0 (0%)
III	50 (29.2%)
IVa	121 (70.8%)
Radiotherapy modality
VMAT	61 (35.7%)
Tomotherapy	110 (64.3%)

VMAT, volumetric modulated arc therapy.