TABLE 1.

Demographics and Clinical Characteristics of Study Population

		Overall			Gender		Race
		n	(% of Total)	Median age of diagnosis (y)	Female n = 1097 (% of total)	Male n = 1311 (% of total)	White n = 2048 (% of total)	Black n = 192 (% of total)	Other n = 153 (% of total)
Cohort		2408	100.0	35	45.6	54.4	85.6	8	6.4
Gender
	Female	1097	45.6	28	ND	ND	44.6	50.5	53.6
	Male	1311	54.4	37	ND	ND	55.4	49.5	46.4
Age (y)
	0–2	252	10.5	1	8.9	11.7	10.3	14.6	9.2
	3–9	269	11.2	5	11.1	11.2	9.7	20.3	18.3
	10–19	234	9.7	14	8.8	10.5	9.6	11.5	9.2
	20–29	264	11.0	25	11.2	10.8	10.5	10.4	15.7
	30–39	335	13.9	35	15.2	12.8	14.2	11.5	12.4
	40–49	377	15.7	45	16.0	15.3	16.2	12.5	12.4
	50–59	340	14.1	55	14.8	13.6	14.5	12.5	12.4
	60–69	196	8.1	65	7.8	8.4	8.7	4.2	5.9
	70–79	114	4.7	74	4.9	4.6	5.1	2.1	3.9
	80+	27	1.1	83	1.1	1.1
Race
	White	2048	85.0	35	83.6	87.2	ND	ND	ND
	Black	192	8.0	33	8.9	7.3	ND	ND	ND
	Other	153	6.4	23	7.5	5.5	ND	ND	ND
	Unknown	15	0.6
Ethnicity
	Hispanic	331	13.7	29	14.1	13.6	15.7	2.1	2
	Non-Hispanic	2063	85.7	38	85.9	86.4	84.3	97.9	98
	Unknown	14	0.6
Site
Spinal cord		958	39.8	45	40.5	39.2	41.3	28.6	32
Supratentorial		910	37.8	20	37.8	37.8	35.8	50.5	49
	Cortex	628	26.1	16	27	25.3	24.3	40.1	32.7
	Ventricle	282	11.7	27	10.8	12.5	11.5	10.4	16.3
Infratentorial		530	22	24	21.3	22.6	22.6	20.8	17.6
	Brain stem	384	15.9	27.5	16.6	15.4	16.3	15.6	12.4
	Cerebellum	146	6.1	14	4.7	7.2	6.3	5.2	5.2
Other		10	0.4	36.5	0.5	0.4	0.4	0	1.3
WHO grade
	Grade II ependymomas	2132	88.5	37	89.5	87.7	89.3	88	80.4
	Grade III anaplastic ependymomas	276	11.5	12.5	10.5	12.3	10.7	12	19.6
Surgery
	Yes	2202	91.4	32	5.6	4.8	5.2	4.4	3.3
	No	120	5.0	47	94.4	95.2	94.8	95.6	96.7
	Unknown	86	3.6
Radiation
	Yes	1104	45.8	28.5	44.3	47.1	47	45.7	54.3
	No	1235	51.3	38	53.3	49.6	53	54.3	45.7
	Unknown	69	2.9