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Survival Groups
| No. of Prognostic Factors* | 2-Year OS (%) | Median Survival (months) | P |
|---|---|---|---|
| 0 | 33 | 5.5 | < .001 |
| 1 | 59 | NR | < .001 |
| 2 | 76 | 42.7 | < .001 |
| 3 | 100 | NR | < .001 |
Abbreviations: NR, not reached; OS, overall survival.
Prognostic factors included Karnofsky performance score 90 to 100, no extracranial metastasis, and tyrosine kinase inhibitor initiated after brain metastasis.
