Table 1. Analysis Variables and Univariate Analysis.

		Post-treatment SGR		Reduction in SGR after radiosurgery
Radiation Characteristics	Median (range)	Regression coefficient	p	Regression coefficient	p
Treatment time (min)	35.20(11.55–79.48)	0.15	0.25	−0.02	0.91
Dose Rate (Gy/min)	2.47(1.80–3.22)	−0.25	0.056	0.18	0.18
CI RTOG4	1.31 (1.06–1.86)	−0.03	0.83	0.10	0.48
Gradient Index	2.81 (2.42–4.03)	0.18	0.17	−0.23	0.46
Homogeneity index	2.00 (1.85–2.50)	0.13	0.35	−0.06	0.65
Volume receiving 100% dose (%)	99.12 (96.40–99.88)	0.12	0.38	−0.04	0.79
Target volume receiving 95% dose(%)	99.78 (98.34–99.99)	0.13	0.36	−0.08	0.58
Min dose (Gy)	10.08 (7.00–16.08)	−0.21	0.13	0.15	0.28
Max dose (Gy)	24.00 (22.22–30.10)	−0.09	0.49	0.09	0.51
Mean dose (Gy)	17.12 (15.61–19.37)	−0.13	0.15	0.28	0.08
Volume of 12Gy isodose (cm3)	1.67 (0.14–11.09)	−0.05	0.71	−0.01	0.93
Prescription isodose (%)	50 (40–54)	0.11	0.44	−0.10	0.46
Number of Isocentres	11 (2–22)	−0.01	0.93	0.04	0.79