Table 1. Clinical characteristics of NPC patients.

Characteristics	NPC patients (n = 39)
Age
≥40	18
<40	21
Gender
Male	33
Female	6
Smoking status
No	23
Yes	16
History of alcohol intake
No	24
Yes	15
Clinical staging
I	2
II	8
III	12
IVa+b	17
T staging
T1	5
T2	12
T3	10
T4	12
N staging
N0	8
N1	9
N2	16
N3	6
M staging
M0	39
M1	0
Co-morbidities
Yes	15
No	24
Histological grade
non-keratinizing carcinoma	39
keratinizing carcinoma	0