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

Table 1

Demographic and clinical characteristics of MM patients with EMD.

		Patient number	Percentage (%)
Total patients		155	100
Age at MM diagnosis (years)	Median (range): 63 (36–93); Mean (SD): 61.57 (10.628)
	<60	62	40
	≥60	93	60
Gender
	Female	71	45.80
	Male	84	54.20
Year of MM diagnosis
	1992–2010	77	49.70
	2011–2016	78	50.30
Race
	White	119	76.80
	Black	23	14.80
	Others	13	8.40
EMD site
	EMD-B	99	63.90
	EMD-S	56	36.10
Interval (month)	Median (range): 19 (0–238)
	0	39	25.20
	≤24	45	29
	>24	71	45.80
Chemotherapy
	Yes	152	98.06
	No or unknown	3	1.94