Table 1 Characteristics of the patient cohort

Sex:

 Male:

95

54.3

 Female:

80

45.7

Smoking history:

 Current:

107

61.1

 Former:

57

32.6

 Never:

11

6.3

Weight loss:

 No weight loss:

48

27.4

 Weight loss < 10 %

99

56.6

 Weight loss ≥ 10 %

22

12.6

 No data:

6

3.4

Tumor size:

  < 3 cm

99

56.6

  > 3 cm - ≤5 cm

55

31.4

  > 5 cm- ≤7 cm

19

10.9

  > 7 cm

2

1.1

Stage:

 I:

97

55.4

 II:

55

31.4

 IIIa:

23

13.1

Histology:

 Adenocarcinoma:

99

56.6

 Squamous cell carcinoma:

44

25.1

 Other:

32

18.3

EGFR:

 EGFR mutated:

13

7.4

 EGFR not mutated:

159

90.9

 EGFR not tested:

3

1.7

Chemotherapy:

 Adjuvant chemotherapy:

54

30.9

 Neoadjuvant chemotherapy:

3

1.7

 No chemotherapy:

116

66.3

 No data:

2

1.1

Radiotherapy:

 Adjuvant or neoadjuvant:

9

5.1

 No radiotherapy

166

94.9

Status at 5 year follow up:

 Alive with no disease:

81

46.3

 Alive with disease:

8

4.6

 Dead:

86

49.1

Cause of death (n = 86):

 Lung cancer:

48

55.8

 Cardiovascular disease:

15

17.4

 Other:

23

26.7