Table 2.
Overall Outcome and Explanatory Variable Characteristics
| Variable (n = number of patients) | Median | Min | Max | Standard Deviation | IQR |
|---|---|---|---|---|---|
| Median overall survival (months) (n = 3190) |
10.8 | 5.3 | 30 | 3.2 | 2.5 |
| Radionecrosis (%) (n = 2860) | 0 (Mean = 4.6%) | 0 | 31.3 | 7.26 | 8 |
| Median age (years) (n = 3302) |
52 | 34 | 64 | 4.7 | 5.6 |
| Median interval (months) (n = 2494) | 13 | 3.1 | 39.4 | 6.5 | 8 |
| Total EQD2 (Gy) (n = 2827) | 108.1 | 80 | 167 | 15.5 | 20.4 |
| Re-irradiation EQD2 (Gy) (n = 3205) |
48.1 | 20 | 110 | 15.6 | 24 |
| Dose per fraction (Gy) (n = 3205) | 3.5 | 1.3 | 20 | 5.6 | 11 |
| Median PTV (ml) (n = 1961) |
21.6 | 1.22 | 424 | 81.0 | 39 |
Abbreviations: XRT, radiotherapy; EQD2, equivalent dose in 2Gy per fraction; PTV, planning target volume; SRS, stereotactic radiosurgery; FSRT, fractionated stereotactic radiotherapy.