. Author manuscript; available in PMC: 2020 Jan 1.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2018 Sep 8;103(1):229–240. doi: 10.1016/j.ijrobp.2018.09.001

Table 2.

Local Progression Rates by mdSBRT Dose and Fractionation

Dose and Fractionation	No. of Local Progressions (n=7)	No. of Patients per Dose Regimen (n=37)	Local Progression Rate by Dose Regimen^*
30 Gy in 3 Fractions	2 (28.6)	11 (29.7)	18.2%
24 Gy in 1 Fraction	0 (0.0)	2 (5.4)	0.0%
18 Gy in 1 Fraction	4 (57.1)	20 (54.1)	20.0%
16 Gy in 1 Fraction	1 (14.3)	4 (10.8)	25.0%

Abbreviations: mdSBRT, metastasis-directed Stereotactic Body Radiation Therapy; No., number.

No difference between groups by Cox regression (P=0.96).