Table 3. Multivariate Cox regression of factors related with overall survival.
| Single variate | Multivariate | ||||
|---|---|---|---|---|---|
| Variate | Case no. | HR (95% CI) | P | HR (95% CI) | P |
| Age (year) | |||||
| ≤ 56 | 61 | 1 | 1 | ||
| > 56 | 63 | 1.45 (0.99–2.13) | 0.059 | 1.46 (0.97–2.19) | 0.070 |
| Gender | |||||
| Female | 5 | 1 | - | ||
| Male | 119 | 1.28 (0.47–3.49) | 0.626 | - | - |
| Esophageal tumor volume (cm3) | |||||
| < 55.3 | 54 | 1 | 1 | ||
| ≥ 55.3 | 70 | 2.01 (1.36–2.99) | 0.001 | 2.16 (1.43–3.26) | < 0.001 |
| Tumor location | |||||
| Upper | 30 | 1 | 1 | ||
| Middle | 40 | 2.54 (1.45–4.47) | 0.001 | 2.24 (1.27–3.96) | 0.006 |
| Lower | 54 | 2.20 (1.29–3.75) | 0.004 | 1.88 (1.08–3.27) | 0.026 |
| TNM stage | |||||
| IIIA | 8 | 1 | - | ||
| IIIB | 40 | 0.64 (0.28–1.46) | 0.286 | - | - |
| IIIC | 76 | 1.14 (0.52–2.49) | 0.746 | - | - |
| Radiation dose (gray) | |||||
| ≤ 60 | 51 | 1 | 1 | ||
| > 60 | 73 | 0.61 (0.41–0.90) | 0.013 | 0.77 (0.51–1.17) | 0.220 |