Table 2 Univariate analysis of prognostic factors associated with the local control and overall survival
Factors | n | 3-year LC (%) | p value | n | 3-year OS (%) | p value |
|---|---|---|---|---|---|---|
Age (years) | 0.44 | 0.80 | ||||
<65 | 35 | 73.3 | 24 | 58.3 | ||
≥65 | 44 | 67.5 | 26 | 69.2 | ||
ECOG performance score | 0.43 | 0.47 | ||||
0–1 | 66 | 71.6 | 40 | 70.0 | ||
2 | 12 | 62.3 | 9 | 33.3 | ||
Stage of the primary tumor | 0.98 | 0.43 | ||||
Stage 1–2 | 20 | 69.4 | 13 | 61.5 | ||
Stage 3–4 | 57 | 70.9 | 35 | 65.7 | ||
Timing of SABR | 0.04 | 0.42 | ||||
First pulmonary metastasis | 51 | 62.6 | 33 | 72.7 | ||
Second or third | 28 | 90.9 | 17 | 47.1 | ||
Pre-SABR CEA level | <0.01 | 0.40 | ||||
≤6 | 62 | 78.1 | 39 | 64.1 | ||
>6 | 10 | 0 | 6 | 66.7 | ||
GTV | 0.01 | 0.02 | ||||
≤1.5 mL | 41 | 88.5 | 25 | 68.0 | ||
>1.5 mL | 38 | 50.1 | 25 | 60.0 | ||
Radiation dose | 0.14 | 0.12 | ||||
≤48 Gy | 56 | 64.6 | 33 | 54.5 | ||
60 Gy | 23 | 84.0 | 17 | 82.4 | ||
LC | - | 0.06 | ||||
Yes | - | - | 39 | 66.7 | ||
No | - | - | 11 | 54.5 |