Table 2.
Assessment of prognostic factors for overall survival
| 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% |
Abbreviations: CEA carcinoembryonic, CIRT carbon ion radiotherapy.