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Cox Regression of OS
| Factor | P | HR | 95% CI | |
|---|---|---|---|---|
| EGFR status | Wild type | 1 | ||
| Mutant | 0.204 | 1.449 | 0.818–2.566 | |
| Unknown | 0.512 | 0.875 | 0.587–1.304 | |
| Previous thoracic radiation therapy | Yes | 1 | ||
| No | 0.010 | 1.855 | 1.162–2.960 | |
| Brain metastases | No | 1 | ||
| Yes | 0.128 | 1.434 | 0.902–2.280 | |
| Number of distant metastases | ≤2 | 1 | ||
| >2 | 0.690 | 1.119 | 0.643–1.948 | |
