Table 2.

Univariate analysis of variables predictive of OS.

Variables	N	OS (m)	P value
Sex
Male	51	10.2 ± 3.17	0.265
Female	65	8.9 ± 2.23
Age (y)
<60	77	10.5 ± 3.52	0.232
≥60	39	9.1 ± 3.29
Number of lesions
1-3	94	10.9 ± 3.55	0.032
> 3	22	8.8 ± 2.16
GTV(cm3)
< 4	54	10.3 ± 4.66	0.132
4~14	49	9.2 ± 2.17
> 14	13	8.9 ± 2.38
GPA score
≤1.0	16	7.2 ± 1.81	0.003
1.5-2.5	57	10.8 ± 2.60
≥3.0	43	14.1 ± 5.32
Gene mutation
KRS mutation	83	7.9 ± 3.08	0.001
No	33	11.8 ± 2.26
Target BED(Gy)
≥ 60	93	11.2 ± 3.26	0.105
< 60	23	9.1 ± 1.28
Treatment
SRT	56	10.9 ± 2.88	0.123
SRS	60	9.8 ± 3.15
Location of primary tumor
Right colon	16	9.1 ± 1.08	0.081
Left colon and rectum	100	10.2 ± 3.35
Extracranial metastasis
Liver	63	9.3 ± 2.61	0.036
Lung	91	10.2 ± 2.17
Multi-organ	51	7.7 ± 2.38
Bevacuzumab
Used	67	11.7 ± 2.38	0.001
No	49	8.3 ± 2.26