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. 2020;7(1):29–37.

Table 3.

Kaplan-Meier Analysis of potential predictive factors on LC following SBRT

Variable Number of Lesions 1-year LC rate (95%CI) p-value
BED7
< 85 Gy7 42 92.2%
(71.5-98.0%)
0.99
≥ 85 Gy7 29 82.3%
(55.8-94.2%)
< 100 Gy7 47 92.3%
(73.7-98.2%)
0.75
≥ 100 Gy7 24 80.1%
(51.1-93.4%)
< 125 Gy7 55 87.2%
(69.0-95.1%)
0.44
≥ 125 Gy7 16 91.7%
(53.9-98.8%)
Fractionation 0.83
Single Fraction 15 87.5%
(38.7-98.1%)
Multiple Fractions 56 88.5%
(71.8-95.6%)
Dose per fraction
< 10 Gy 31 95.8%
(73.9-99.4%)
0.84
≥ 10 Gy 40 82.4%
(59.5-93.0%)
< 15 Gy 42 87.3%
(64.8-95.8%)
0.40
≥ 15 Gy 29 89.6%
(64.3-97.3%)
Location
Osseous Metastases 42 89.2%
(69.8-96.5%)
0.93
Non-Osseous Metastases 29 86.7%
(56.4%-96.5%)
Bone (Excluding Spine) 24 91.3%
(69.5-97.8%)
Lung 21 83.5%
(64.4-92.9%)
Age 0.054
< 65 years 31 100% (N/A)
≥ 65 years 40 76.1%
(51.0-89.5%)
GTV 0.51
< 25 cc 18 100% (N/A)
≥ 25 cc 53 84.4%
(66.2 – 93.3%)
Initial KPS 0.43
< 80% 13 100%
≥ 80% 58 86.9%
(71.0-94.3%)