Table 1.

Characteristics of thyroid cancer cases by histological group, SEER registries 2007–2010*

	Histology groups
	Papillary		Follicular		Medullary		Anaplastic		Other epithelial		Other specified		Total
	N	Per cent	N	Per cent	N	Per cent	N	Per cent	N	Per cent	N	Per cent	N	Per cent
Diagnosis age (years)
<50	18 358	51	1333	41	279	39	20	5	65	23	136	36	20 191	49
50–64	11 603	32	1026	31	238	33	90	24	67	24	117	31	13 141	32
65+	6059	17	929	28	205	28	271	71	152	54	124	33	7740	19
Sex
Female	27 906	77	2304	70	445	62	233	61	186	65	257	68	31 331	76
Male	8114	23	984	30	277	38	148	39	98	35	120	32	9741	24
Race/ethnicity†
Caucasian†	24 285	67	2241	68	494	68	264	69	182	64	251	67	27 717	67
Hispanic	5540	15	412	13	108	15	45	12	34	12	47	12	6186	15
API†	3684	10	264	8	35	5	51	13	32	11	34	9	4100	10
African-American†	1930	5	312	9	68	9	18	5	28	10	34	9	2390	6
Other	581	2	59	2	17	2	*	*	*	*	11	3	679	2
Tumour size (cm)
≤2	24 745	69	784	24	347	48	*	*	*	*	154	41	26 083	64
>2	9907	28	2271	69	326	45	289	76	106	37	172	46	13 071	32
Unknown	1368	4	233	7	49	7	83	22	134	47	51	14	1918	5
Insurance status
Fully insured	26 800	74	2 366	72	497	69	227	60	169	60	265	70	30 324	74
Uninsured	847	2	83	3	27	4	*	*	*	*	*	*	985	2
Any Medicaid	2621	7	289	9	80	11	47	12	40	14	35	9	3112	8
Insured, NOS	4683	13	466	14	104	14	74	19	43	15	53	14	5423	13
Unknown	1069	3	84	3	14	2	23	6	24	8	14	4	1228	3
Census tract SES
Q1 (low)	4672	13	508	15	124	17	55	14	49	17	58	15	5466	13
Q2	5904	16	579	18	133	18	73	19	61	21	74	20	6824	17
Q3	7063	20	618	19	143	20	75	20	55	19	66	18	8020	20
Q4	8134	23	721	22	151	21	88	23	47	17	79	21	9220	22
Q5 (high)	9685	27	811	25	162	22	82	22	63	22	97	26	10 900	27
Unknown	562	2	51	2	*	*	*	*	*	*	*	*	642	2
Total	36 020	88	3288	8	722	2	381	1	284	1	377	1	41 072	100

*SEER 18 registries excluding Louisiana and Alaska and 232 cases with poorly specified histologies. Case counts suppressed to conceal cells with 10 or fewer cases.

†Caucasian, African-American, and API exclude persons of Hispanic ethnicity.

API, Asian/Pacific Islander; NOS, not otherwise specified; Q, quintile; SEER, Surveillance, Epidemiology, and End Results; SES, socioeconomic status.