Clinical Characteristics and Prognostic Analysis of Multiple Myeloma with Extramedullary Disease: A SEER-Based Study

Table 3

Univariate Cox proportional regression analysis of myeloma-specific survival and overall survival.

		Myeloma-specific survival			Overall survival
		Hazard ratio	95% CI	value	Hazard ratio	95% CI	value
Age at MM diagnosis (years)
	<60	1	Reference		1	Reference
	≥60	1.786	1.096–2.912	0.02	1.9	1.21–2.984	0.005
Gender
	Female	1	Reference		1	Reference
	Male	1.102	0.696–1.745	0.679	1.036	0.680–1.579	0.868
Race
	Black	1	Reference		1	Reference
	White	0.777	0.404–1.493	0.448	0.808	0.443–1.471	0.485
	Others	1.32	0.545–3.197	0.539	1.256	0.549–2.874	0.59
EMD site
	EMD-B	1	Reference		1	Reference
	EMD-S	1.646	1.036–2.615	0.035	1.537	1.005–2.352	0.048
Interval (month)
	0	1	Reference		1	Reference
	≤24	1.951	1.048–4.016	0.039	1.658	1.004–3.074	0.048
	>24	0.554	0.274–0.98	0.047	0.423	0.229–0.780	0.006