Table 2.

Demographic data.

Variables	N (%)/mean±SD
Gender
male	17(80.9)
female	4(19.1)
Age	59.5 ± 8.2
BMI	23.2 ± 3.5
Tumor Location
Middle	16(76.2)
lower	5(23.8))
Pathology
Squamous	21(100)
Others	0(0)
Differentiation
I	2(9.5)
I-II	1(4.8)
II	9(42.8)
II-III	6(28.6)
III	3(14.3)
pT Stage∗
1	3(14.3)
2	4(19.0)
3	14(66.7)
pN Stage∗
0	6(28.6)
1	8(38.1)
2	4(19.0)
3	3(14.3)
pTNM Stage∗
I	3(14.3)
II	3(14.3)
III	12(57.1)
IV	3(14.3)

^∗8th AJCC TNM staging.