Table 3.
Multivariate Cox regression analysis of factors affecting progression‐free survival among patients who did not undergo surgery
| Risk factor | Hazard ratio | 95% CI | P |
|---|---|---|---|
| Gender | |||
| Female | 1 (Ref) | – | – |
| Mal | 4.06 | 1.72–9.63 | <0.01 |
| Age | |||
| ≤65 | 1 (Ref) | – | – |
| >65 | 0.32 | 0.13–0.77 | 0.01 |
| ECOG | |||
| 0 | 1 (Ref) | – | – |
| ≥1 | 2.69 | 1.18–6.17 | 0.02 |
| CA 19‐9 | |||
| <1000 | 1 (Ref) | – | – |
| ≥1000 | 1.60 | 0.63–4.05 | 0.32 |
| Vessel involvement | |||
| Venous only | 1 (Ref) | – | – |
| Arterial only | 0.31 | 0.09–1.09 | 0.07 |
| Both arterial and venous | 0.34 | 0.15–0.78 | 0.01 |
| Neoadjuvant therapy | |||
| Chemoradiation only | 1 (Ref) | – | – |
| Chemo only | 2.09 | 0.66–6.67 | 0.21 |
| Chemo > chemoradiation | 0.53 | 0.21–1.36 | 0.18 |