Table 1.

Demographics of patients and tumor characteristics

Characteristic	No. of patients (n = 54)
Age
40-50	19
51-61	23
62-72	12
Sex
Male	35
Female	19
Histological differentiation
Well	17
Moderate	29
Poor	8
Location
Middle	33
Low	21
Size
<5 cm	35
≥5 cm	19
TNM stage
I	0
II	24
III	27
IV	3
LN
N0	33
N1	21
HPV infection
HPV16	14
HPV18	8
Both and others	24
None	8

LN represents lymph node metastasis, N0-without, N1-with.