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Risk Factors of Tumor-Free Survival Found to Be Significant (p < 0.05) by Backward Cox Proportional Hazard Regression (Multivariate Analysis)
| Variable | RR | 95% CI |
|---|---|---|
| Bilobar tumor (p < 0.0001) | 3.1 | [1.7,5.4] |
| Compared with unilobar | ||
| Tumor size (p < 0.0003) | ||
| Compared with size ≤ 2 cm | ||
| 2–5 cm | 4.5 | [1.5, 13.0] |
| > 5 cm | 6.7 | [2.2, 19.9] |
| Vascular invasion (p < 0001) | ||
| Compared with none | ||
| Micro | 4.4 | [2.1, 9.5] |
| Macro | 15.0 | [6.7, 33.8] |
CI, confidence interval; RR relative risk.
