Table 1. Patient characteristics (n = 160).

Gender
Male	89
Female	71
T factor
Tis	13
T1a	4
T1b	41
T1c	36
T2a	32
T2b	10
T3	16
T4	8
N factor
N0	111
N1	17
N2	30
N3	2
Pleural invasion
Pl0	114
Pl1	30
Pl2	6
Pl3	10
Pathologic stage
I	91
II	28
III	35
IV	6
Surgical procedure
Pneumonectomy	3
Lobectomy	128
Segmentectomy	14
Wedge resection	15