Table 2. Univariate Cox proportional regression analyses results.
| Variable | Univariate analysis | |
|---|---|---|
| HR (95% CI) | p | |
| Sex | ||
| Male | 1.00 | |
| Female | 0.64 (0.43–0.94) | 0.023 |
| Age,y | 1.00 (0.98–1.02) | 0.836 |
| Blood type | ||
| A | 1.00 | |
| B | 1.42 (0.83–2.44) | 0.198 |
| O | 1.41 (0.81–2.45) | 0.225 |
| AB | 1.29 (0.73–2.28) | 0.378 |
| Length of smoking time (year) (As dummy variable) | ||
| None | 1.00 | |
| 1–10 | 1.03 (0.57–1.86) | 0.910 |
| 11–20 | 0.95 (0.60–1.50) | 0.818 |
| 21–30 | 0.98 (0.66–1.44) | 0.906 |
| 30– | 0.94 (0.62–1.41) | 0.761 |
| Length of smoking time (year) (As continuous variable) | 1.00 (0.99–1.01) | 0.644 |
| Length of alcohol drinking time (year) (As dummy variable) | ||
| None | 1.00 | |
| 1–10 | 1.35 (0.65–2.80) | 0.424 |
| 11–20 | 1.11 (0.75–1.64) | 0.593 |
| 21–30 | 1.04 (0.70–1.55) | 0.842 |
| 30– | 1.26 (0.81–1.95) | 0.303 |
| Length of alcohol drinking time (year) (As continuous variable) | 1.00 (0.99–1.01) | 0.596 |
| Family history in first degree relatives with any cancer | ||
| None | 1.00 | |
| Yes | 0.94 (0.60–1.49) | 0.806 |
| Types of esophageal resection | ||
| ILE, MIE, 3-field | 1.00 | |
| Left thoracic | 0.81 (0.60–1.09) | 0.162 |
| Tumor length (cm) | ||
| ≤3 | 1.00 | |
| >3 | 2.35 (1.68–3.27) | <0.001 |
| Tumor classification (As dummy variable) | 2.14 (1.69–2.75) | |
| Tis/T1 | 1.00 | |
| T2 | 4.94 (1.76–13.82) | <0.001 |
| T3 | 8.45 (3.12–22.87) | <0.001 |
| T4 | 17.93 (5.22–61.54) | <0.001 |
| Tumor classification (As continuous variable) | ||
| Lymph node classification (As dummy variable) | ||
| N | 1.00 | |
| N1 | 2.17 (1.51–3.11) | <0.001 |
| N2 | 3.26 (2.23–4.76) | <0.001 |
| N3 | 2.73 (1.45–5.13) | <0.001 |
| Lymph node classification (As continuous variable) | ||
| Grade | ||
| Well differentiated | 1.00 | |
| Moderately differentiated | 1.07 (0.63–1.82) | 1.823 |
| Poorly differentiated | 0.33 (0.08–1.46) | 1.455 |