| Tested Variable | Number (%) | Univariate | Multivariate |
|---|
| median OS (M) | P value | Tested Variable | HR | 95%CI | P value |
|---|
| Age at surgery (median; 63.5) |
| < 63-years | 21 (43.8) | 29.2 | 0.4 | | | | |
| ≥ 63-years | 27 (56.2) | 16.8 | | | | | |
| Median time from STI to surgery (12mo) |
| ≥ 12 months | 22 (45.8) | 32.9 | 0.13 | | | | |
| < 12 months | 26 (54.2) | 13.1 | | | | | |
| Pathological diagnosis |
| Radiation necrosis alone | 6 (12.5) | 22.8 | 0.76 | | | | |
| Tumor recurrence + Necrosis | 42 (87.5) | 20.2 | | | | | |
| Gender |
| Female | 16 (33.3) | 29 | 0.11 | | | | |
| Male | 32 (66.7) | 16.8 | | | | | |
| Location | | | | Location | | | |
| Supratentrial | 42 (87.5) | 25.5 | 0.016 | Supra- vs Infratentrial | 0.5 | 0.18–1.52 | 0.2 |
| Infratentrial | 6 (12.5) | 9.1 | | | | | |
| Primary cancer | | | | Primary cancer | | | |
| Breast | 9 (18.8) | 43 | 0.003 | Breast vs Lung | 0.2 | 0.036–0.55 | 0.002 |
| Lung | 31 (64.6) | 16.8 | | Breast vs Others | 0.1 | 0.013–0.34 | 7E-04 |
| Others | 8 (16.6) | 9.4 | | Lung vs Others | 0.5 | 0.2–1.2 | 0.12 |
| Neurological deficit |
| No | 15 (31.3) | 21.9 | 0.56 | | | | |
| Yes | 33 (68.7) | 16.8 | | | | | |
| RPA | | | | RPA | | | |
| Class 1 | 6 (12.5) | NR | 0.023 | Class 1 vs 3 | 0.1 | 0.02–0.51 | 0.002 |
| Class 2 | 18 (37.5) | 21.9 | | Class 2 vs 3 | 0.4 | 0.16–0.95 | 0.042 |
| Class 3 | 24 (50) | 11.2 | | Class 1 vs 2 | 0.3 | 0.05–0-1.35 | 0.13 |
| Surgical technique |
| Minimum resection | 23 (48) | 25.5 | 0.7 | | | | |
| Resection with free margine | 25 (52) | 17.9 | | | | | |
| Extent of resection |
| Subtotal removal | 6 (12.5) | 28.2 | 0.98 | | | | |
| Gross total removal | 42 (87.5) | 20.2 | | | | | |
| Radiotherapy after salvage surgery |
| Yes | 15 (31.3) | 20.2 | 0.38 | | | | |
| No | 33 (68.7) | 16.8 | | | | | |
