Table 2.
Univariate analysis for distant brain failure.
| Characteristics | sHR | 95% CI | P value |
|---|---|---|---|
| Age (>65) | 2.06 | 0.70–6.04 | 0.2 |
| Sex | |||
| Male | 1.68 | 0.56–5.07 | 0.4 |
| KPS (> 80) | 0.64 | 0.18–2.24 | 0.5 |
| Extra-cranial metastases | 2.22 | 0.79–6.24 | 0.1 |
| Number of intracranial metastases | |||
| >1 brain metastasis | 0.78 | 0.46–1.34 | 0.4 |
| Histology | |||
| NSCLC | 0.83 | 0.27–2.62 | 0.8 |
| Melanoma | 1.42 | 0.43–4.68 | 0.6 |
| Cavity volume (>20 cc) | 1.03 | 1.00–1.06 | 0.06 |
| PTV volume (>50 cc) | 1.00 | 0.99–1.02 | 0.6 |
| PTV/cavity volume (>0.4) | 3.81 | 0.02–871.89 | 0.6 |
| CI (>1.0) | 2.16 | 0.67–7.01 | 0.2 |