Table I.

Clinicopathological characteristics of patients with non-small cell lung cancer.

Variable	Cases, n
Sex
Male	55
Female	36
Age, years
≤60	50
>60	41
Smoking status
Yes	37
No	54
Histological subtype
Squamous	28
Adenocarcinoma	63
Tumor location
Peripheral	66
Central	25
T stage
T1	33
T2	41
T3	17
N stage
N0	40
N1	10
N2	41

T, tumor; N node.