Variable | Forward stepwisea | Backward stepwiseb | ||
---|---|---|---|---|
 | HRc(95% CId) | p | HR (95% CI) | p |
Location of tumor | Â | 0.074 | Â | 0.004* |
Head | - | Â | 1 | Â |
Body and tail | - | Â | 2.178 (1.274-3.725) | Â |
Differentiation | Â | 0.022* | Â | 0.007* |
Well | 1 | Â | 1 | Â |
Moderate | 1.560 (0.681-3.572) | 0.293 | 1.726 (0.752-3.961) | 0.198 |
Poor | 3.775 (1.302-10.943) | 0.014* | 4.807 (1.661-13.913) | 0.004* |
TNM staging | Â | 0.089 | Â | 0.015* |
IA + IB | - |  | 1 |  |
IIA | - | 0.804 | 2.694 (1.163-6.240) | 0.021* |
IIB | - | 0.666 | 2.892 (1.306-6.404) | 0.009* |
III + IV | - | 0.039 | 4.277 (1.746-10.476) | 0.001* |
Serum CA19-9 (kU/L) | Â | 0.036* | Â | 0.028* |
≤ 39 | 1 |  | 1 |  |
> 39 | 1.803 (1.038-3.130) | Â | 1.881 (1.071-3.304) | Â |
YY1 | Â | 0.004* | Â | 0.032* |
Low level overexpression | 1 | Â | 1 | Â |
High level overexpression | 0.416 (0.229-0.756) | Â | 0.511 (0.277-0.944) | Â |