Table 3: Number of Cases, Percent and Age-Specific Incidence Rate* (ASIR) of First Primary Central Nervous System Tumors among Children, Adolescents and Teens by Diagnositic Group, Age Group and Tumor Behavior, California, 2001-2005
	< 5 years												5-9 years
	Malignant				Benign				Uncertain		Total		Malignant				Benign				Uncertain		Total
Diagnostic Groups	n	%	ASIR	95% CI	n	%	ASIR	95% CI	n	%	n	%	n	%	ASIR	95% CI	n	%	ASIR	95% CI	n	%	n	%
IIIA Ependymomas & Choroid Plexus Tumor	74	21.8%			21	13.6%	0.2	(0.1, 0.2)			99	18.1%	28	9.4%	0.2	(0.1, 0.3)	11	7.4%			6	9.2%	45	8.8%
IIIB Astrocytomas	67	19.8%	0.8	(0.6, 0.9)	119	77.3%	0.9	(0.8,1.1)			189	34.6%	72	24.2%	1.0	(0.9, 1.2)	102	68.9%	0.8	(0.6, 0.9)	8	12.3%	182	35.7%
IIIC1 Medulloblastomas	64	18.9%	0.5	(0.4, 0.6)	0	0.0%			0	0.0%	64	11.7%	68	22.9%	0.5	(0.4, 0.7)	0	0.0%			0	0.0%	68	13.3%
IIIC2 PNET	47	13.9%	0.4	(0.3, 0.5)	0	0.0%			0	0.0%	47	8.6%	29	9.8%	0.2	(0.1, 0.3)	0	0.0%			0	0.0%	29	5.7%
IIIC9 Other Intracranial & Intraspinal	18	5.3%	0.1	(0.1, 0.2)	0	0.0%			0	0.0%	18	3.3%					0	0.0%			0	0.0%
IIID Other Gliomas	40	11.8%	0.4	(0.3, 0.5)	0	0.0%			0	0.0%	40	7.3%	73	24.6%	0.6	(0.5, 0.8)	0	0.0%			0	0.0%	73	14.3%
IIIE Other Specified Intracranial & Intraspinal									36	66.7%	43	7.9%					22	14.9%	0.2	(0.1, 0.3)	46	70.8%	71	13.9%
XA Intracranial & Intraspinal Germ Cell	8	2.4%			5	3.2%			0	0.0%	13	2.4%	13	4.4%							0	0.0%	14	2.7%
Z Other	17	5.0%			6	3.9%			11	20.4%	34	6.2%	9	3.0%			12	8.1%			5	7.7%	26	5.1%
Total	339	100.0%	2.6	(2.4, 2.9)	154	100.0%	1.2	(1.0, 1.4)	54	100.0%	547	100.0%	297	100.0%	2.3	(2.0, 2.5)	148	100.0%	1.1	(1.0, 1.3)	65	100.0%	510	100.0%
	10-14 years												15-19 years
IIIA Ependymomas & Choroid Plexus Tumor	23	9.0%	0.2	(0.1, 0.3)	5	3.1%			12	15.8%	40	8.1%	21	9.4%	0.2	(0.1, 0.2)					12	13.5%	37	6.8%
IIIB Astrocytomas	66	25.9%	0.7	(0.6, 0.9)	89	55.6%	0.7	(0.5, 0.8)	7	9.2%	162	33.0%	71	31.8%	0.6	(0.5, 0.8)	61	25.8%	0.5	(0.4, 0.6)	5	5.6%	137	25.0%
IIIC1 Medulloblastomas	28	11.0%	0.2	(0.1, 0.3)	0	0.0%			0	0.0%	28	5.7%	23	10.3%	0.2	(0.1, 0.3)	0	0.0%			0	0.0%	23	4.2%
IIIC2 PNET	17	6.7%	0.1	(0.1, 0.2)	0	0.0%			0	0.0%	17	3.5%	11	4.9%			0	0.0%			0	0.0%	11	2.0%
IIIC9 Other Intracranial & Intraspinal	0	0.0%			0	0.0%			0	0.0%	0	0.0%	0	0.0%			0	0.0%			0	0.0%	0	0.0%
IIID Other Gliomas	51	20.0%	0.4	(0.3, 0.5)	0	0.0%			0	0.0%	51	10.4%	35	15.7%	0.3	(0.2, 0.4)	0	0.0%			0	0.0%	35	6.4%
IIIE Other Specified Intracranial & Intraspinal					41	25.6%	0.3	(0.2, 0.4)	46	60.5%	91	18.5%	6	2.7%			138	58.5%	1.1	(0.9, 1.3)	56	62.9%	200	36.5%
XA Intracranial & Intraspinal Germ Cell	59	23.1%	0.4	(0.3, 0.6)					0	0.0%	62	12.6%	43	19.3%	0.3	(0.2, 0.4)					0	0.0%	45	8.2%
Z Other	7	2.7%			22	13.8%			11	14.5%	40	8.1%	13	5.8%			31	13.1%			16	18.0%	60	10.9%
Total	255	100.0%	1.9	(1.6, 2.1)	160	100.0%	1.2	(1.0, 1.4)	76	100.0%	491	100.0%	223	100.0%	1.7	(1.5, 2.0)	236	100.0%	1.8	(1.6, 2.1)	89	100.0%	548	100.0%
* Age-specific incidence rates are per 100,000 population. Rates are standardized to the 2000 US population.
PNET = Primitive Neuroectodermal Tumors
Shaded cells = rates could not be calculated if number of cases were less than 15 and/or the underlying population was less than 100,000.