Pediatric Thyroid Carcinoma Incidence and Temporal Trends in the USA (1973–2007): Race or Shifting Diagnostic Paradigm?

Table 1

Pediatric thyroid cancer incidence by year of diagnosis, SEER dataset, in 1973–2007.

Year of diagnosis	Population at risk	Tumor count	Rate	RR	95% CI
					LL	UL
1973–2007	247,638,784	1,360
1973	5,982,303	31	0.5	0.91	0.61	1.30
1974	6,706,606	31	0.4	0.78	0.53	1.12
1975	7,182,481	30	0.4	0.70	0.47	1.01
1976	7,094,067	51	0.7	1.21	0.90	1.61
1977	7,005,266	32	0.4	0.76	0.52	1.09
1978	6,930,226	41	0.5	0.98	0.70	1.35
1979	6,867,527	30	0.4	0.73	0.49	1.05
1980	6,825,778	33	0.4	0.81	0.55	1.15
1981	6,768,320	33	0.5	0.83	0.57	1.18
1982	6,699,252	36	0.5	0.94	0.66	1.31
1983	6,652,577	43	0.6	1.15	0.83	1.56
1984	6,604,197	31	0.5	0.84	0.57	1.20
1985	6,595,047	42	0.6	1.17	0.84	1.59
1986	6,591,444	32	0.5	0.89	0.61	1.26
1987	6,611,620	38	0.6	1.05	0.74	1.45
1988	6,654,692	29	0.4	0.82	0.55	1.19
1989	6,705,175	34	0.5	0.97	0.67	1.36
1990	6,789,031	34	0.5	0.97	0.67	1.37
1991	6,856,321	24	0.4	0.69	0.44	1.02
1992	6,945,467	45	0.7	1.27	0.92	1.71
1993	7,063,402	33	0.5	0.91	0.62	1.28
1994	7,159,479	32	0.5	0.87	0.59	1.23
1995	7,251,171	45	0.7	1.20	0.87	1.62
1996	7,344,331	35	0.5	0.91	0.63	1.27
1997	7,425,322	31	0.4	0.79	0.53	1.12
1998	7,505,219	48	0.7	1.20	0.88	1.60
1999	7,562,024	50	0.7	1.23	0.91	1.64
2000	7,597,829	51	0.7	1.25	0.93	1.66
2001	7,623,698	48	0.6	1.17	0.86	1.56
2002	7,622,505	51	0.7	1.24	0.92	1.65
2003	7,627,054	52	0.7	1.27	0.94	1.67
2004	7,650,359	44	0.6	1.06	0.77	1.44
2005	7,665,955	38	0.5	0.91	0.64	1.26
2006	7,714,191	45	0.6	1.07	0.78	1.44
2007	7,758,848	57	0.7	1.34	1.01	1.75

LL: lower limit of confidence limit; UL: upper limit of confidence limit; CI: confidence interval; RR: rate ratio compared to 1973–2007.