Table 2.

Univariate analysis of demographics and clinical characteristics.

Variable	N	Events	Median months	1-Year survival % (95% CI)	log-rank p value	Cox univariate hazard ratio (95% CI)	Cox univariate Wald p-value
Sex					0.023
Female	259	157 (61%)	13.4	58.4 (52.3, 64.5)		–
Male	262	178 (68%)	11.1	48.6 (42.4, 54.8)		1.28 (1.03, 1.59)	0.024
Race					0.75
Non-white	82	51 (62%)	12.3	52.0 (40.9, 63.1)		–
White	439	284 (65%)	12.7	53.8 (49.0, 58.5)		0.95 (0.71, 1.28)	0.75
Age					0.005
< 65	307	186 (61%)	13.8	56.8 (51.1, 62.4)		–
≥ 65	214	149 (70%)	10.5	48.8 (42.0, 55.6)		1.36 (1.10, 1.69)	0.005
KPS					< 0.001
< 90	221	157 (71%)	8.9	40.8 (34.2, 47.4)		1.97 (1.55, 2.50)	< 0.001
≥ 90	220	119 (54%)	18.4	66.8 (60.5, 73.1)		–
Missing	80	59 (74%)	12.1	51.3 (40.0, 62.6)		1.65 (1.21, 2.26)	0.002
Lesion number					0.49
1	258	160 (62%)	13.3	55.7 (49.4, 61.9)		–
≥ 2	261	173 (66%)	12.3	51.4 (45.2, 57.6)		1.08 (0.87, 1.34)	0.49
SRS					< 0.001
0–1	345	245 (71%)	9.8	43.4 (38.1, 48.8)		–
≥ 2	164	82 (50%)	21.7	75.1 (68.4, 81.8)		0.45 (0.35, 0.58)	< 0.001
Histology					< 0.001
Other	131	100 (76%)	9.1	38.7 (30.1, 47.3)		–
Adenocarcinoma	371	221 (60%)	15.0	58.4 (53.3, 63.5)		0.57 (0.45, 0.72)	< 0.001
EC-mets					0.018
No	273	166 (61%)	13.9	57.7 (51.7, 63.6)		–
Yes	238	162 (68%)	10.5	47.9 (41.4, 54.5)		1.30 (1.04, 1.61)	0.018
WBRT					0.11
No	390	248 (64%)	12.2	51.0 (45.9, 56.1)		–
Yes	131	87 (66%)	14.9	60.7 (52.3, 69.1)		0.82 (0.64, 1.05)	0.11
Age	521	335 (64%)	12.7	53.5 (49.1, 57.8)		1.014 (1.003, 1.025)	0.012
KPS	441	276 (63%)	12.7	53.8 (49.1, 58.6)		0.96 (0.95, 0.97)	< 0.001
Lesion number	519	333 (64%)	12.7	53.5 (49.1, 57.9)		0.99 (0.96, 1.03)	0.72
SRS	509	327 (64%)	12.7	53.8 (49.4, 58.2)		0.65 (0.57, 0.75)	< 0.001

Significant differences (p < 0.05) are bolded.