Table 1. Chi-square value and P value by tumor size (log-rank test and Cox stepwise proportional hazard test).
| Threshold | Log-rank test | Cox stepwise proportional hazard test | ||||
| X2 value | P value | 5-Year survival(>5 cm) | X2 value | P value | Hazard ratio (95% CI) | |
| 1 cm | 11.501 | 0.001 | 46.1 | 1.876 | 0.171 | 3.953(0.553,28.248) |
| 2 cm | 74.232 | 0.000 | 43.3 | 11.619 | 0.001 | 2.353(1.439,3.849) |
| 3 cm | 150.651 | 0.000 | 34.0 | 22.108 | 0.000 | 1.748(1.385,2.206) |
| 4 cm | 189.385 | 0.000 | 34.0 | 30.915 | 0.000 | 1.627(1.370,1.932) |
| 5 cm | 278.115 | 0.000 | 26.1 | 60.279 | 0.000 | 1.809(1.557,2.101) |
| 6 cm | 220.752 | 0.000 | 24.8 | 26.724 | 0.000 | 1.530(1.311,1.785) |
| 7 cm | 195.257 | 0.000 | 22.6 | 29.106 | 0.000 | 1.499(1.389,1.618) |
| 8 cm | 157.061 | 0.000 | 17.1 | 23.477 | 0.000 | 1.558(1.302,1.865) |
| 9 cm | 148.531 | 0.000 | 17.0 | 20.174 | 0.000 | 1.521(1.267,1.826) |
| 10 cm | 61.214 | 0.000 | 13.0 | 11.115 | 0.001 | 1.609(1.217,2.128) |
| 12 cm | 87.593 | 0.000 | 6.0 | 20.652 | 0.000 | 2.183(1.559,3.056) |
| 13 cm | 71.714 | 0.000 | 6.0 | 20.49 | 0.000 | 2.224(1.574,3.144) |
| 14 cm | 82.623 | 0.000 | 3.9 | 22.692 | 0.000 | 2.376(1.664,3.392) |