Table 4.

Thyroid Cancer Incidence in the Surveillance, Epidemiology, and End Results 13-Registry Database (1992–2006) by Gender, Type, and Tumor Size Among Whites

	Women			Men			Female/male	95% CI
Tumor size	n	Rate	SE	n	Rate	SE	IRR	LL	UL
Papillary
<1 cm	5551	3.09	0.04	1470	0.84	0.02	3.67	3.46	3.89
1 to <2.0 cm	5199	2.95	0.04	1426	0.82	0.02	3.60	3.40	3.83
2.0 to <4.0 cm	3849	2.18	0.04	1506	0.87	0.02	2.51	2.36	2.66
4.0+ cm	907	0.50	0.02	651	0.38	0.02	1.32	1.19	1.46
Unknown	2931	1.63	0.03	1141	0.67	0.02	2.44	2.28	2.62
Follicular
<1 cm	105	0.06	0.01	38	0.02	0.00	2.66	1.82	3.97
1 to <2.0 cm	457	0.26	0.01	99	0.06	0.01	4.48	3.59	5.63
2.0 to <4.0 cm	849	0.47	0.02	300	0.18	0.01	2.67	2.34	3.06
4.0+ cm	375	0.19	0.01	397	0.24	0.01	0.83	0.72	0.96
Unknown	350	0.18	0.01	158	0.09	0.01	1.97	1.62	2.39
Medullary
<1 cm	63	0.03	0.00	42	0.03	0.00	1.39	0.92	2.11
1 to <2.0 cm	104	0.06	0.01	46	0.03	0.00	2.18	1.52	3.15
2.0 to <4.0 cm	129	0.07	0.01	85	0.05	0.01	1.43	1.08	1.91
4.0+ cm	50	0.03	0.00	60	0.04	0.01	0.74	0.50	1.10
Unknown	54	0.03	0.00	57	0.03	0.01	0.85	0.58	1.27
Anaplastic
<1 cm	2	—	—	1	—	—	—	—	—
1 to <2.0 cm	9	—	—	2	—	—	—	—	—
2.0 to <4.0 cm	22	0.01	0.00	17	0.01	0.00	1.01	0.51	2.06
4.0+ cm	93	0.04	0.00	80	0.05	0.01	0.83	0.61	1.14
Unknown	99	0.05	0.01	68	0.04	0.01	1.10	0.80	1.53

Whites include non-Hispanics only.

—, not calculated and/or not applicable.