Table 4.
Multivariable analysis for overall survival by treatment modality in stratified risk groups
| Treatment modality | Multivariable analyses |
||
|---|---|---|---|
| Adjusted HR | 95% CI | p-value | |
| LRRT (yes vs. no) | |||
| Low-risk | 0.23 | 0.09-0.61 | 0.003 |
| Intermediate-risk | 0.40 | 0.21-0.76 | 0.005 |
| High-risk | 0.85 | 0.41-1.76 | 0.660 |
| MRT (yes vs. no) | |||
| Low-risk | 1.98 | 0.54-2.90 | 0.110 |
| Intermediate-risk | 1.05 | 0.50-2.21 | 0.907 |
| High-risk | 0.76 | 0.29-1.95 | 0.566 |
Multivariable cox regression model adjusted for age, sex, T category, N category, and pre-treatment Epstein-Barr virus DNA. HR, hazard ratio; CI, confidence interval; LRRT, locoregional radiotherapy; MRT, metastasis radiotherapy.