Table 4. Multivariate cox proportional hazards regression analysis of SCEC patients.

Variable	CSS		OS
	HR (95% CI)	P-value	HR (95% CI)	P-value
Sex
Male Vs Female	1.331 (0.936–1.893)	0.111	1.264 (0.897–1.781)	0.180
Race
White Vs Black	0.697 (0.454–1.070)	0.099	0.734 (0.482–1.116)	0.148
Other Vs Black	1.044 (0.524–2.079)	0.904	1.025 (0.517–2.032)	0.945
Stage
Localized Vs Distant	0.258 (0.162–0.411)	< 0.001***	0.252 (0.160–0.396)	< 0.001***
Regional Vs Distant	0.415 (0.263–0.657)	< 0.001***	0.442 (0.286–0.683)	< 0.001***
Year
1993-2002 Vs 1973-1992	0.612 (0.381–0.982)	0.042*	0.622 (0.394–0.982)	0.041*
2003-2012 Vs 1973-1992	0.513 (0.323–0.815)	0.005***	0.509 (0.325–0.798)	0.003***
Age
70− Vs 70+	0.497 (0.346–0.714)	< 0.001***	0.492 (0.345–0.701)	< 0.001***
Radiation
Radiation Vs None	0.547 (0.385–0.778)	< 0.001***	0.559(0.396–0.789)	< 0.001***

Abbreviations: HR = hazard ratio; CI = confidence interval.

^*P < 0.05;

^**P < 0.01;

^***P < 0.001