Table 7.
Cox proportional hazard regression analysis for 1‐year PFS
| Wald | Sig. | HR | 95.0% CI for Exp(B) | ||
|---|---|---|---|---|---|
| Lower | Upper | ||||
| Age | 0.609 | 0.435 | 2.125 | 0.646 | 6.989 |
| Clinical stage | 0.000 | 0.986 | 0.628 | 0.146 | 2.704 |
| GTV volume | 3.893 | 0.048 | 3.265 | 1.008 | 10.579 |
| Pathology | 1.904 | 0.168 | 0.588 | 0.107 | 3.239 |
| Site | 2.265 | 0.132 | 1.538 | 0.591 | 4.004 |
| Re‐radiotherapy | 4.356 | 0.037 | 2.991 | 1.069 | 8.367 |
| PT beam types | 0.052 | 0.820 | 1.385 | 0.315 | 6.090 |
Abbreviations: CI, confidence interval; HR, hazard ratio; PFS, progression‐free survival; PT, particle therapy.