TABLE 1.
Baseline Characteristics
| Baseline characteristics | All patients (N = 293) n (%) or median (IQR) |
|---|---|
| Age, years | 63 (IQR: 56-68) |
| Gender | |
| Male | 144 (49%) |
| Female | 141 (58%) |
| Unrecorded | 8 (3%) |
| Time of appearance of brain metastases | |
| Metachronous | 161 (60%) |
| Synchronous | 106 (40%) |
| Prior whole-brain irradiation | |
| No | 61 (21%) |
| Yes | 232 (79%) |
| Number of metastases >2 cm treated with GKRS | |
| 0 | 167 (57) |
| 1 | 95 (32) |
| 2 | 13 (4) |
| 3 | 4 (1) |
| Unrecorded | 14 (5) |
| Time from WBRT to SRS, days | 258 (IQR: 166-431) |
| Total number of lesions treated with SRS | 2 (IQR: 1-5) |
| Total SRS treatment volume, cc | 3.3 (IQR: 0.91-7.60) |
| Largest brain metastases SRS volume | 1.86 (0.50-6.03) |
| Mean SRS marginal dose, Gy | 18.0 (16.0-19.84) |