Table 1.

Basline demographic and clinicopathological characteristics

Characteristics Patients (n)
Total evaluable patients 302
Histological type	Adenocarcinoma	Squamous	Benign
Age (years)
Median	60	67	56
Range	25–84	62–78	36–76
Gender
Female	149	3	14
Male	106	16	14
TNM Stage
I	193	2	NA
II	4	2	NA
III	7	0	NA
IV	39	5	NA
ND	12	10	NA

ND not determined, NA not appliacable