Table 1 Baseline characteristics of patients

Age (years)

 Mean ± SEM

66.8 ± 9.2

65.0 ± 10.8

 Range

32–85

19–85

Gender

 Female (%)

61

33.00%

17

29.10%

 smorking

2

3.30%

0

0%

 Male (%)

124

67.00%

38

70.90%

 smorking

52

41.90%

19

50%

Histology subtype

 LUAC

104

56.20%

-

 LUSC

53

28.60%

-

 SCLC

23

12.40%

-

Metastatic Cancer

5

2.70%

-

Infalmmatory Pseudotumors

37

67.30%

Pulmonary Tuberculosis

6

10.90%

Others benign disease

12

21.80%

Stages of Lung cancer

 I

28

15.10%

-

 II

20

10.80%

-

 III

40

21.60%

-

 IV

97

52.40%

-

Largest diameter of pulmonary nodule

 0 ~ 10 mm

10

5.40%

-

 11 ~ 50 mm

124

67.00%

-

 51 ~ 100 mm

29

15.70%

-

 101 ~ 300 mm

12

6.50%

-

 Unknown

10

5.40%

-