Table 1. Clinical and pathological characteristics of patients.

Patients (n=364)	n (%)
Age-year (median±SD)	67±10
Gender
Male	176 (48.4)
Female	188 (51.6)
Stage
I	228 (62.6)
II	60 (16.5)
III	58 (15.9)
IV	18 (5.0)
pT
T1	137 (37.6)
T2	187 (51.4)
T3	17 (4.7)
T4	23 (6.3)
pN
N0	263 (72.2)
N1	66 (18.1)
N2	34 (9.4)
N3	1 (0.3)
Histology
ADC	242 (66.5)
SCC	122 (33.5)

Abbreviations: ADC=adenocarcinoma; pN=pathological N stage; pT=pathological T stage; SCC=squamous cell carcinoma; SD=standard deviation.