Table 1 Patients characteristics
Characteristics | Number(n) | Percentage(%) |
|---|---|---|
Age (years) | ||
  ≥ 60 | 53 | 45.7 |
  < 60 | 63 | 54.3 |
Gender | ||
 Male | 69 | 59.5 |
 Female | 41 | 40.5 |
KPS | ||
  ≥ 70 | 108 | 93.1 |
  < 70 | 8 | 6.9 |
Primary site | ||
 Non-small-cell lung cancer | 59 | 50.9 |
 Small-cell lung cancer | 19 | 16.4 |
 Breast | 18 | 15.5 |
 Colorectal | 8 | 6.9 |
 Other | 12 | 10.3 |
Aggregate volume of intra-cranial \metastases (mm3) | ||
  ≥ 5500 | 64 | 55.2 |
  < 5500 | 52 | 44.8 |
Aggregate volume of whole brain(m3) | ||
  ≥ 1.5 | 84 | 72.4 |
  < 1.5 | 32 | 27.6 |