| variable | SE | HR | 95.0% CI | P | 
| Gender (male vs female) | 0.220 | 1.075 | 0.699 - 1.653 | 0.742 | 
| Age (≤60 vs >60) | 0.010 | 1.005 | 0.985 - 1.025 | 0.639 | 
| Tumor site (head vs body and tail) | 0.273 | 0.650 | 0.381 - 1.109 | 0.114 | 
| Differentiation (well, moderate and poor) | 0.199 | 1.482 | 1.002 - 2.191 | 0.049 | 
| T stage (1, 2, 3) | 0.170 | 1.035 | 0.742 - 1.443 | 0.838 | 
| TNM stage (I, II, III) | 0.162 | 1.561 | 1.137 - 2.144 | 0.006 | 
| Perinerual invasion (present vs absent) | 0.307 | 2.14 | 1.172 - 3.908 | 0.013 | 
| Vascular invasion (present vs absent) | 0.357 | 1.425 | 0.708 - 2.867 | 0.321 | 
| LN metastasis (present vs absent) | 0.221 | 2.106 | 1.365 - 3.251 | 0.001 | 
| Tumor SPARC (positive vs negative) | 0.246 | 0.758 | 0.469 - 1.227 | 0.260 | 
| Stroma SPARC (positive vs negative) | 0.245 | 2.151 | 1.330 - 3.477 | 0.002 |