Table 2.
Multivariate analysis of parameters for the prediction of overall survival
| Variable |
All patients |
Patients with single sites of metastasis |
Patients with ≥2 sites of metastasis |
|||
|---|---|---|---|---|---|---|
| HR | P value | HR | P value | HR | P value | |
| Sex(female vs. male) |
0.742 |
0.117 |
0.605 |
0.079 |
0.786 |
0.201 |
| Age(<60y vs. ≥60y) |
0.841 |
0.288 |
0.915 |
0.740 |
0.856 |
0.340 |
| Pathological type (squamous vs. non-squamous ) |
0.991 |
0.957 |
0.919 |
0.767 |
0.973 |
0.872 |
| T stage(T3-4 vs. T1-2) |
1.109 |
0.537 |
1.178 |
0.667 |
1.188 |
0.296 |
| N stage(N2-3 vs. N0-1) |
1.286 |
0.232 |
1.213 |
0.597 |
1.305 |
0.208 |
| Thoracic radiation dose |
0.615 |
0.007 |
0.576 |
0.045 |
0.619 |
0.008 |
| (≥63Gy vs. <63Gy) | ||||||
| Radiotherapy to metastases(yes vs. no) |
0.729 |
0.063 |
0.340 |
0.001 |
0.674 |
0.017 |
| Chemotherapy cycles |
0.693 |
0.038 |
0.625 |
0.079 |
0.691 |
0.039 |
| (≥4 cycles vs. < 4 cycles) | ||||||
| Metastasis status |
1.513 | 0.014 | - | - | - | - |
| (multi- vs. single) | ||||||