Table 2: Features of the brain metastasis according to group A and B.
| | Total (N = 90) | group A (N = 47) | group B (N = 43) | p value |
| Timing of metastasis | synchronous | 34 (37.8%) | 22 (46.8%) | 12 (27.9%) | 0.065 |
| metachronous | 56 (62.2%) | 25 (53.2%) | 31 (72.1%) |
| Tumor size | < 3cm | 31 (34.4%) | 12 (25.5%) | 19 (44.2%) | 0.063 |
| ≥ 3cm | 59 (65.6%) | 35 (74.5%) | 24 (55.8%) |
| Tumor location | supratentorial | 75 (83.3%) | 37 (78.7%) | 38 (88.4%) | 0.220 |
| infratentorial | 15 (16.7%) | 10 (21.3%) | 5 (11.6%) |
| Functional grade | 1 | 23 (25.6%) | 22 (46.8%) | 1 (2.3%) | 0.000 |
| 2 | 45 (50.0%) | 18 (38.3%) | 27 (62.8%) |
| 3 | 22 (24.1%) | 7 (14.9%) | 15 (34.9%) |
| Postoperative radiotherapy | performed | 29 (32.2%) | 4 (8.5%) | 25 (58.1%) | 0.000 |
| not-performed | 61 (67.8%) | 43 (91.5%) | 18 (41.9%) |