Table 2.
Multivariable analysis of associations between clinical variables and radiation technique with OS and PFS for all patients with early-stage NKTCL
| Variable | OS | PFS | ||||
|---|---|---|---|---|---|---|
| HR | 95% CI | P | HR | 95% CI | P | |
| Sex (female vs male) | 0.88 | 0.71-1.09 | .257 | 0.96 | 0.80-1.16 | .684 |
| B symptoms (yes vs no) | 0.89 | 0.72-1.09 | .261 | 0.97 | 0.81-1.16 | .715 |
| Ann Arbor stage (II vs I) | 1.62 | 1.31-1.99 | <.001 | 1.38 | 1.15-1.65 | <.001 |
| PTI (yes vs no) | 1.82 | 1.47-2.25 | <.001 | 1.72 | 1.44-2.07 | <.001 |
| Age as continuous variable | 1.14 | 1.07-1.22 | <.001 | 1.08 | 1.02-1.14 | .010 |
| Elevated LDH level (yes vs no) | 1.27 | 1.03-1.56 | .024 | 1.17 | 0.97-1.40 | .098 |
| ECOG PS (≥2 vs 0-1) | 2.10 | 1.47-3.00 | <.001 | 2.16 | 1.57-3.00 | <.001 |
| RT technique (3D-CRT vs IMRT) | 1.38 | 1.13-1.69 | .002 | 1.51 | 1.26-1.80 | <.001 |