Table 2. Characteristics of 120 brain metastases and treatment parameters.
Values are presented as median (range) or number (%).
The p-value shows the results of the comparison using the t-test for continuous data or Fisher’s exact test for categorical data.
| Characteristic | All | sSRS | fSRS | p-value |
| sSRS or fSRS | 65 | 55 | ||
| GTV diameter (mm) | 10 (3-43) | 7 (3-15) | 17 (4-43) | <0.001 |
| GTV volume (cc) | 0.48 (0.01-21.5) | 0.19 (0.01-1.75) | 1.84 (0.04-21.5) | <0.001 |
| Prescription dose | ||||
| 24 Gy/1 fr | 65 (54.2) | 65 (100) | ||
| 30 Gy/3 fr | 2 (1.7) | 2 (3.6) | ||
| 35 Gy/5 fr | 49 (40.8) | 49 (89.1) | ||
| 42 Gy/10 fr | 4 (3.3) | 4 (7.3) | ||
| GTV D98 BED10 (Gy) | 99.9 (63.9-111.7) | 103.8 (96.1-111.7) | 72.8 (63.9-89.2) | <0.001 |
| V84 Gy (cc) | 2.75 (0.37-28.71) | 1.57 (0.37-5.88) | 5.42 (0.66-28.17) | <0.001 |
| V112 Gy (cc) | 2.01 (0.29-17.96) | 1.22 (0.29-4.33) | 3.66 (0.46-17.96) | <0.001 |
| 84 Gy vol. (cc) | 1.76 (0.4-7.23) | |||
| 81.6Gy vol. (cc) | 7.29 (0.74-43.35) | |||
| Location | 0.043 | |||
| Superficial | 60 (50.0) | 33 (50.8) | 27 (49.1) | |
| Deep | 52 (43.3) | 31 (47.7) | 21 (38.2) | |
| Central | 8 (6.7) | 1 (1.5) | 7 (12.7) |