Table 4 Univariate analysis for OS rate
| Â | 0.5-year OS rate (%) | 1-year OS rate (%) | 2-year OS rate (%) | P value |
|---|---|---|---|---|
Concurrence of metastasis in other sites | ||||
 ▪ Yes | 92.3 | 67.1 | 38.4 | 0.660 |
 ▪ No | 100.0 | 66.7 | 44.4 |  |
GTV (ml) | ||||
 ▪ < 34.5 | 100 | 76.9 | 53.8 | 0.011 |
 ▪ ≥ 34.5 | 88.9 | 50.8 | 16.9 |  |
Local control | ||||
 ▪ Yes | 94.4 | 70.8 | 45.1 | 0.121 |
 ▪ No | 100.0 | 50.0 | 25.0 |  |
Additional organ metastasis after SBRT | ||||
 ▪ Yes | 94.4 | 59.0 | 29.5 | 0.006 |
 ▪ No | 100 | 100 | 100 |  |
Tracking method | ||||
 ▪ X-sight spine | 95 | 73.9 | 45.5 | 0.038 |
 ▪ Synchrony respiratory motion | 100.0 | 50.0 | 0 |  |
Age (years) | ||||
 ▪ < 60 | 93.8 | 67.0 | 44.6 | 0.263 |
 ▪ ≥ 60 | 100 | 66.7 | 33.3 |  |
Targeted therapy | ||||
 ▪ Yes | 100 | 100 | 60 | 0.097 |
 ▪ No | 93.8 | 53.6 | 33.5 |  |
Systemic treatment | ||||
 ▪ Yes | 100 | 100 | 66.7 | 0.078 |
 ▪ No | 93.3 | 50.3 | 28.7 |  |