Table 1 Correlation between serum exosomal miR-184 expression levels in patients with NSCLC and their clinicopathological characteristics. (* p < 0.05)

Age(years), Median

 < 60

33

15

18

 ≥ 60

31

13

18

Gender

 Male

28

12

16

 Female

36

16

20

Smoking history

 Never smoking

49

23

26

 Now/once smoking

15

5

10

ECOG Score

 0–1

53

25

28

 ≥ 2

11

3

8

Primary tumor

 ≤ 4 cm

19

9

10

 > 4 cm

45

19

26

TNM

 I–IVA

25

9

16

 IVB

39

19

20

PLT

 Low(≤ 146)

13

7

6

 High(> 146)

51

21

30

LDH

 Low(≤ 199)

29

8

21

 High(> 199)

35

20

15

CEA

 Low(≤ 8.605)

25

8

17

 High(> 8.605)

39

20

19

Distant metastasis

 No

17

5

12

 Yes

47

23

24

Contralateral lung metastasis

 No

24

7

17

 Yes

40

21

19

Pleura metastasis

 No

33

14

19

 Yes

31

14

17

Bone metastasis

 No

23

9

14

 Yes

41

19

22

Brain metastasis

 No

36

14

22

 Yes

28

14

14