Table 1 Patient characteristics

Total sample size, N

38

Gender, N (males/female)

14/24

Age, mean ± SD (min, max)

70 ± 9 (56, 91)

Packs per year, mean ± SD (min, max)

33 ± 25 (0, 100)

Current smoker, N (%)

6 (15.79%)

Stage

 Stage IA, N (%)

21 (55.3%)

 Stage IB, N (%)

17 (44.7%)

Developed lymphovascular invasion, N (%)

6 (15.8%)

Developed pleural invasion, N (%)

13 (34.2%)

Progressed, N (%)

14 (36.84%)

 Local–regional, N

4

 Second primary, N

3

 Distal, N

7