Table 1. Characteristics of the 164 NSCLC patients.

Variable	Number (N)	Percentage (%)
Gender
Male	99	60.37
Female	65	39.63
Age
≤60 years	96	58.54
>60 years	68	41.46
Histological cell type
Adenocarcinoma	112	68.29
Squamous cell carcinoma	38	23.17
Others	14	8.54
Differentiation
Well-differentiated	37	22.56
Moderately- or poorly-differentiated	127	77.43
Tumor stage
I	79	48.17
II	52	31.70
III	33	20.13