Table 1. Patient characteristics and treatment parameters.
| Characteristics | Value |
|---|---|
| Number of patients | 36 |
| Age (years) | |
| Median | 56 |
| < 65 | 27 (75) |
| ≥ 65 | 9 (25) |
| Gender | |
| Male | 16 (44.4) |
| Female | 20 (55.6) |
| Primary cancer | |
| Non-small cell lung cancer | 10 (27.8) |
| Breast cancer | 10 (27.8) |
| Colorectal cancer | 5 (13.9) |
| Renal cell carcinoma | 2 (5.5) |
| Othersa | 9 (25) |
| Previous treatment | |
| None | 22 (61.1) |
| WBRT | 8 (22.2) |
| Radiosurgery | 6 (16.7) |
| Number of metastasis | |
| 1 | 17 (47.2) |
| 2–3 | 12 (33.3) |
| >4 | 7 (19.5) |
| Primary disease | |
| Uncontrolled | 21 (58.3) |
| Controlled | 15 (41.7) |
| Karnofsky performance status | |
| Median | 90 |
| Range | 60–100 |
| RTOG RPA class | |
| 1 | 6 (16.7) |
| Others | 30 (8) |
| GPA score | |
| 0–1 | 7 (19.4) |
| 1.5–2.5 | 18 (50) |
| 3–4 | 11 (30.6) |
| SRS dose (Gy) | |
| 8 * 3 fractions | 24 (66.6) |
| Others | 12 (33.3) |
| Gross tumor volume (cm3) | |
| 10–14 | 11 (30.6) |
| >14 | 25 (69.4) |
| Mean | 18.3 |
| Range | 10.0–50.3 |
| Prescribed tumor volume (cm3) | |
| Mean | 21.2 |
| Range | 11.5–67.8 |
| Covered ratio (%) | 95–99 |
a Other histology include: 2 Squamous cell carcinoma, 2 Ovarian cancer, 1 Melanoma, 1 Hematologic malignancy, 1 Ewing sarcoma, 1 Cervix cancer, 1 Unknown.