Table 11: Features of the brain metastasis affecting distant recurrence in univariate and multivariate analysis (Cox regression model).
CI*; confidence interval, NR†; not reached at median value, NA‡; not assessed, MCR§; microscopic complete resection, GTR☐; gross total resection.
| Factor | median | median survival (month) | univariate analysis (month) | Hazard ratio (95% CI*) | multivariate analysis (month) | Hazard ratio (95% CI) |
| Timing of metastasis | synchronous | NR† | 0.458 | 1.30 (0.65, 2.62) | NA‡ | |
| metachronous | NR |
| Tumor size | < 3cm | NR | 0.570 | 1.24 (0.59, 2.62) | NA | |
| ≥ 3cm | NR |
| Tumor locations | supratentorial | NR | 0.230 | 2.04 (0.62, 6.70) | NA | |
| infratentorial | NR |
| Method of surgery | Group A (MCR§) | NR | 0.071 | 1.94 (0.93, 4.02) | 0.173 | 1.87 (0.76, 4.59) |
| Group B (GTR☐) | NR |