Table 6.
Cox regression analyses. The influence of different clinicopathological factors on survival
| Hazard ratio | 95% CI | Significance | ||
|---|---|---|---|---|
| Centralization status | Post-centralization (Reference: Pre-centralization) | 0.6 | 0.4–1.1 | 0.08 |
| Age | ≥ 70 (Reference < 70) | 1.8 | 1.1–2.8 | 0.02 |
| Comorbidity | 0 (Reference) | |||
| 1 | 1.0 | 0.6–1.6 | 1.0 | |
| ≥ 2 | 1.2 | 0.7–2.1 | 0.51 | |
| Unknown | 1.7 | 0.2–13.8 | 0.62 | |
| Tumor stage | Stage 1 (Reference) | |||
| Stages 2 and 3 | 2.8 | 1.8–4.3 | < 0.01 | |
| Stage 4 | 9.6 | 4.6–19.7 | < 0.01 | |
| Unknown | 1.5 | 0.7–3.1 | 0.26 | |
| Chemotherapy | Yes (Reference: No) | 0.8 | 0.5–1.3 | 0.42 |