Table 2 1- and 3-year medium survival rates and univariate analysis of patients with lung metastasis in colorectal cancer

Total case

49.2 ± 0.6

15.9 ± 0.5

12.0 (11.4–12.6)

68.5 ± 1.4

36.1 ± 1.6

24.0 (21.8–26.1)

Age

 < 65

57.8 ± 0.9

18.8 ± 0.8

17.0 (16.2–17.8)

81.1 ± 1.8

49.6 ± 2.6

35.0 (29.7–40.2)

 ≥ 65

38.5 ± 0.9

11.5 ± 0.7

8.0 (7.3–8.7)

58.2 ± 0.2

25.0 ± 2.0

17.0 (14.8–19.2)

Grade

 Grade I

54.8 ± 3.1

19.3 ± 2.8

15.0 (11.9–18.1)

61.1 ± 8.1

28.5 ± 8.6

25.0 (21.2–28.8)

 Grade II

56.3 ± 0.9

19.5 ± 0.8

15.0 (14.1–15.9)

75.1 ± 2.1

41.4 ± 2.7

31.0 (27.4–34.6)

 Grade III

36.9 ± 1.6

11.2 ± 1.2

7.0 (5.9–8.1)

58.3 ± 5.0

35.2 ± 5.2

18.0 (10.9–25.0)

 Grade IV

36.5 ± 4.0

13.8 ± 2.3

7.0 (4.2–9.8)

74.0 ± 1.2

–

24.0 (2.6–45.4)

 Unknown

41.7 ± 1.2

10.2 ± 0.9

9.0 (8.0–9.9)

51.3 ± 3.8

–

14.0 (10.0–18.0)

AJCC T stage

 T0

43.9 ± 1.8

11.1 ± 1.3

1.0 (0–2.5)

–

–

6.0 (3.1–10.2)

 T1

66.4 ± 4.3

29.5 ± 4.7

10.0 (8.6–11.4)

57.5 ± 5.3

–

21.0 (11.2–30.8)

 T2

62.5 ± 1.1

26.0 ± 1.2

21.0 (14.9–27.1)

67.9 ± 8.8

57.8 ± 1.0

41.0 (29.7–52.3)

 T3

26.6 ± 1.2

12.0 ± 1.0

19.0 (17.9–20.1)

78.2 ± 2.2

46.6 ± 3.0

33.0 (27.8–38.2)

 T4

15.4 ± 1.1

5.3 ± 0.9

12.0 (10.9–13.0)

58.1 ± 3.9

28.2 ± 3.0

19.0 (12.9–25.0)

 T_X

–

–

8.0 (7.2–8.8)

46.9 ± 4.7

11.8 ± 3.8

11.0 (6.0–16.0)

AJCC N stage

 N0

47.7 ± 1.1

15.5 ± 0.9

12.0 (11.0–13.0)

61.4 ± 2.3

28.4 ± 2.3

19.0 (16.0–22.0)

 N1

53.0 ± 1.1

18.9 ± 1.0

14.0 (12.9–15.1)

74.7 ± 2.2

43.0 ± 2.8

29.0 (24.2–34.0)

 N2

54.6 ± 1.5

17.3 ± 1.0

14.0 (12.6–15.4)

73.3 ± 3.1

39.6 ± 3.0

26.0 (21.9–26.1)

 N3

36.7 ± 1.6

7.9 ± 1.0

7.0 (5.8–8.2)

–

–

–

Marital status

 Married

54.2 ± 0.9

18.7 ± 0.8

14.0 (13.2–14.8)

60.4 ± 2.2

29.6 ± 2.2

19.0 (16.4–21.6)

 Single

44.1 ± 0.9

12.6 ± 0.7

10.0 (9.3–10.7)

77.7 ± 1.9

42.7 ± 2.5

31.0 (27.1–34.9)

 Other

48.5 ± 2.5

17.9 ± 2.1

12.0 (9.5–14.5)

63.6 ± 6.5

29.7 ± 6.5

22.0 (21.9–26.1)

Chemotherapy

 Yes

63.7 ± 0.7

21.0 ± 0.7

18.0 (17.3–18.7)

83.0 ± 1.4

47.6 ± 2.2

33.0 (29.8–36.2)

 No/Unknown

18.6 ± 0.9

5.0 ± 0.6

2.0 (1.7–2.3)

36.7 ± 2.7

11.2 ± 1.9

8.0 (6.3–9.7)

Radiotherapy

 Yes

58.5 ± 1.5

21.9 ± 1.4

16.0 (14.8–17.2)

78.6 ± 2.5

43.6 ± 3.3

31.0 (25.1–36.9)

46.9 ± 0.7

14.1 ± 0.6

11.0 (10.4–11.6)

65.2 ± 1.7

33.1 ± 1.9

21.0 (18.8–23.2)

Surgery

 Yes

61.7 ± 1.0

25.7 ± 1.0

19.0 (17.8–20.2)

79.4 ± 1.7

50.1 ± 2.3

37.0 (33.0–40.9)

41.7 ± 0.8

9.7 ± 0.6

9.0 (8.4–9.6)

55.3 ± 2.3

17.9 ± 2.1

14.0 (11.9–16.1)

Site

 Right-sided colon

39.1 ± 1.1

9.7 ± 0.8

8.0 (7.2–8.8)

58.8 ± 2.8

29.3 ± 2.8

19.0 (16.4–21.6)

 Left-sided colon

51.2 ± 1.2

17.8 ± 1.1

13.0 (11.9–14.1)

72.1 ± 3.1

40.2 ± 3.7

27.0 (22.4–31.6)

 Rectum

56.4 ± 1.1

19.4 ± 1.0

15.0 (13.9–16.1)

71.1 ± 4.3

41.2 ± 5.6

31.0 (21.4–40.6)

 Rectosigmoid

52.3 ± 1.9

18.8 ± 1.7

14.0 (12.1–15.9)

72.9 ± 2.1

37.0 ± 2.6

25.0 (21.4–28.6)

Insurance status

 Insured

52.6 ± 0.8

18.1 ± 0.7

14.0 (13.2–14.8)

72.8 ± 6.7

24.7 ± 7.2

21.0 (16.3–25.7)

 Uninsured

48.0 ± 2.7

14.1 ± 2.1

12.0 (9.8–14.2)

68.4 ± 1.5

36.7 ± 1.7

24.0 (21.6–26.4)

 Unknown

44.1 ± 1.0

12.7 ± 12.8

10.0 (9.2–10.8)

64.3 ± 12

–

22.0 (21.9–26.1)

Race

 White

49.4 ± 0.7

16.3 ± 0.6

12.0 (11.3–12.7)

73.3 ± 3.5

33.7 ± 3.5

23.0 (20.6–25.2)

 Black

46.1 ± 1.6

12.4 ± 1.2

11.0 (9.8–12.2)

67.2 ± 1.7

35.5 ± 1.9

25.0 (20.0–30.0)

 Others

48.3 ± 1.9

6.0 ± 1.4

12.0 (10.2–13.7)

71.3 ± 0.4

36.5 ± 5.7

29.0 (21.8–36.2)

Gender

0.946

0.271

 Female

48.2 ± 0.9

16.1 ± 0.8

12.0 (11.112.9)

65.3 ± 2.5

34.6 ± 2.8

23.0 (19.8–26.2)

 Male

49.4 ± 0.9

14.5 ± 0.7

12.0 (11.3–12.7)

68.3 ± 2.4

36.6 ± 2.7

24.0 (20.5–27.5)

Osseous metastasis

–

–

–

 No

51.4 ± 0.7

17.1 ± 0.6

13.0 (12.4–13.6)

 Yes

31.0 ± 0.9

6.4 ± 1.2

6.0 (4.9–7.1)

 Unknown

41.8 ± 3.8

10.6 ± 2.5

7.0 (5.3–8.7)

Brain metastasis

–

–

–

 No

17.1 ± 0.6

16.4 ± 0.6

13.0 (12.4–13.6)

 Yes

25.6 ± 3.4

11.1 ± 1.3

4.0 (2.4–5.6)

 Unknown

60..9 ± 6.4

19.0 ± 5.4

17.0 (12.7–21.3)

Liver metastasis

–

–

–

 No

49.7 ± 0.7

15.9 ± 0.5

20.0 (18.5–21.5)

 Yes

24.9 ± 3.4

–

10.0 (9.4–10.6)

 Unknown

41.2 ± 3.5

11.3 ± 2.4

17.0 (12.7–21.3)