Skip to main content

Table 2 Assessment of prognostic factors for overall survival

From: Carbon ion radiotherapy for oligo-recurrent lung metastases from colorectal cancer: a feasibility study

Factor

Group

No. of patients

3-year overall surviaval

Log-rank test P value

Sex

Male

20

62.9%

0.47

 

Female

14

36.9%

 

Age (years)

≥63

21

64.0%

0.13

 

<63

13

25.0%

 

Primary cancer

Colon

15

53.9%

0.87

 

Rectum

19

44.6%

 

Previous systematic chemotherapy

Yes

18

39.6%

0.79

 

No

16

56.8%

 

Previous pulmonary resection

No

10

47.6%

0.60

 

Yes

24

68.1%

 

Interval between initial surgery and first CIRT

≥36 month

23

67.6%

0.19

 

<36 months

11

30.3%

 

CEA before first CIRT

<5

20

42.9%

0.98

 

≥5

14

68.1%

 

Maximun diameter of lung tumor

≥18 mm

21

51.8%

0.60

 

<18 mm

13

50.0%

 
  1. Abbreviations: CEA carcinoembryonic, CIRT carbon ion radiotherapy.