Table 2.
Univariate analysis of prognostic factors and survival
| Variable | No. | Survival rate (%) | Median survival time (months) | χ2 value | P value | ||
|---|---|---|---|---|---|---|---|
| 1 year | 3 year | 5 year | |||||
| Gender | 1.433 | 0.231 | |||||
| Male | 195 | 90.3 | 55.0 | 43.2 | 45.8 | ||
| Female | 33 | 87.9 | 66.7 | 55.6 | 75.0 | ||
| Age (years) | 1.734 | 0.629 | |||||
| ≤50 | 49 | 89.8 | 55.0 | 46.1 | 44.8 | ||
| 51–60 | 98 | 88.8 | 63.9 | 43.9 | 50.5 | ||
| 61–70 | 65 | 90.8 | 50.3 | 46.0 | 41.8 | ||
| >70 | 16 | 93.8 | 43.8 | 43.8 | 30.1 | ||
| Location | 0.683 | 0.711 | |||||
| Upper | 24 | 87.5 | 58.3 | 30.2 | 42.4 | ||
| Middle | 119 | 90.8 | 57.7 | 49.0 | 50.8 | ||
| Lower | 85 | 89.4 | 54.8 | 40.5 | 48.4 | ||
| Differentiation | 6.333 | 0.042 | |||||
| High | 39 | 92.3 | 71.8 | 45.0 | 55.8 | ||
| Middle | 121 | 92.6 | 57.4 | 48.3 | 47.3 | ||
| Low | 68 | 83.8 | 46.7 | 40.2 | 30.1 | ||
| Degree of metastatic lymph nodes (%) | 6.836 | 0.009 | |||||
| ≤20% | 195 | 90.8 | 60.2 | 48.2 | 55.1 | ||
| >20% | 33 | 84.8 | 36.4 | 27.3 | 29.0 | ||
| Vascular tumor thrombus | 13.616 | 0.000 | |||||
| No | 186 | 90.3 | 62.0 | 50.4 | 64.5 | ||
| Yes | 42 | 88.1 | 33.3 | 21.4 | 24.4 | ||
| UICC02 T-stage | 0.422 | 0.516 | |||||
| T1+T2 | 48 | 97.9 | 60.1 | 41.8 | 55.1 | ||
| T3+T4 | 180 | 87.8 | 55.8 | 45.4 | 47.3 | ||
| UICC02 N-stage | 12.150 | 0.000 | |||||
| N0 | 42 | 92.9 | 80.6 | 71.9 | — | ||
| N1 | 186 | 89.2 | 51.3 | 38.9 | 39.0 | ||
| Number of metastatic lymph nodes | 15.138 | 0.002 | |||||
| 0 | 42 | 92.9 | 80.6 | 71.9 | — | ||
| 1–2 | 110 | 90.9 | 56.9 | 40.1 | 45.9 | ||
| 3–6 | 64 | 85.9 | 42.2 | 40.1 | 26.9 | ||
| 7- | 12 | 91.7 | 50.0 | 37.5 | 29.8 | ||
| UICC02 stage | 13.270 | 0.001 | |||||
| IIA | 38 | 92.1 | 81.6 | 72.3 | — | ||
| IIB | 47 | 97.9 | 61.3 | 42.7 | 55.1 | ||
| III | 143 | 86.7 | 48.7 | 38.8 | 34.8 | ||
UICC, International Union Against Cancer.