Table 4. Univariate analysis of factors for survival in all thoracic ESCC.
| Factor | HR | 95% CI | P value |
|---|---|---|---|
| Sex (M/F) | 0.910 | 0.563–1.470 | 0.699 |
| Age (≤60/>60) | 1.131 | 0.685–1.867 | 0.630 |
| Location (U/M-L) | 1.109 | 0.694–1.774 | 0.664 |
| Vascular invasion (P/N) | 1.975 | 1.184–3.293 | 0.009 |
| Nerve invasion (P/N) | 1.604 | 0.965–2.665 | 0.068 |
| Differentiation (H-HM/M-ML) | 0.609 | 0.384–0.964 | 0.034 |
| Tumor size (<5/≥5 cm) | 2.016 | 1.266–3.208 | 0.003 |
| T stage (T1–2/T3–4) | 2.686 | 1.664–4.335 | <0.001 |
| TNM stage (H-HM/M-ML) | 3.759 | 2.220–6.365 | <0.001 |
| Total lymph nodes (P/N) | 2.337 | 1.445–3.754 | <0.001 |
| Supraclavicular lymph nodes (P/N) | 2.671 | 1.621–4.402 | <0.001 |
ESCC, esophageal squamous cancer; M, male; F, female; U, upper; M, middle; L, lower; H, high differentiation; M, medium differentiation; L, low differentiation; P, positive; N, negative.