Table 4.

Results of Cox proportional hazards regression for STR and GTR cohorts, after PSM with respect to adjuvant RT status

	STR		GTR
	AHR [95% CI]	P	AHR [95% CI]	P
Gender
Male	1		1
Female	0.697 [0.448–1.085]	.110	0.489 [0.291–0.822]	.007
Race
Caucasian	1		1
African American	0.980 [0.421–2.281]	.963	2.639 [1.499–4.645]	.001
Asian/Pacific Islander	1.650 [0.512–5.319]	.402	0.000 [0.000-Inf]	.996
Radiation
No	1		1
Yes	0.590 [0.352–0.989]	.045	1.093 [0.649–1.841]	.737
Tumor size	1.000 [0.999–1.000]	.461	1.000 [0.999–1.001]	.877
Age	1.075 [1.055–1.095]	.000	1.072 [1.049–1.096]	.000