Table 2 Univariate and multivariate analysis of overall survival (OS)
Parameters | 5-year OS | p value | Hazard ratio (95% CI) | p value |
|---|---|---|---|---|
Age | Â | 0.759 | Â | 0.513 |
  < 57 | 56.3% |  | reference |  |
 ≥ 57 | 56.2% |  | — |  |
Stage | Â | 0.434 | Â | 0.513 |
 II | 62.9% |  | reference |  |
 III | 54.5% |  | — |  |
T stage | Â | 0.121 | Â | 0.204 |
 T2 | 100% |  | reference |  |
 T3 | 60.2% |  | — |  |
 T4 | 47.5% |  | — |  |
N stage | Â | 0.736 | Â | 0.798 |
 0 | 62.9% |  | reference |  |
 1 | 55.7% |  | — |  |
 2 | 52.0% |  | — |  |
APR | Â | 0.431 | Â | 0.459 |
 No | 56.7% |  | reference |  |
 Yes | 55.7% |  | — |  |
Anal verge (cm) | Â | 0.196 | Â | 0.169 |
 ≤5 | 55.9% |  | reference |  |
 6–10 | 63.5% |  | — |  |
  > 10 | 36.4% |  | — |  |
Pretreatment CEA level | Â | 0.004 | Â | 0.005 |
  < 10 ng/mL | 64.5% |  | reference |  |
 ≥ 10 ng/mL | 35.9% |  | 2.229 (1.272–3.906) |  |