Table 3.
Cox regression models to examine the prognostic factors for progression-free survival
| Covariate | Hazard Ratio | P | 95% confidence interval |
|---|---|---|---|
| Stage | |||
| 1* | 1.00 | ||
| 2 | 8.38 | 0.07 | 0.83–84.92 |
| 3 | 9.16 | 0.11 | 0.63–133.20 |
| 4 | 9.61 | 0.10 | 0.67–137.20 |
| Surgery + Radiation | |||
| With Radiation* | 1.00 | ||
| Without Radiation | 0.41 | 0.41 | 0.05–3.44 |
| Surgical margin | |||
| Negative* | 1.00 | ||
| Positive | 5.47 | 0.06 | 0.93–32.08 |
*
Reference category.
There was no statistically significant factor identified as an independent prognostic factor for disease progression; the hazard ratio of resection margin- positive patients approached significance at 5.47 (P = 0.06). Adjuvant radiation was not identified as a significant predictor for progression-free survival (P = 0.41).