Table 2. Annual Mean Incidence of Patients with Hypothyroidism Taking Levothyroxine from 2008 to 2012.

	Men		Women		All
	Incidencea	Number	Incidencea	Number	Incidencea	Number
Age, yr
≤4	0.30	1,718	0.27	1,459	0.29	3,177
5-9	0.06	362	0.19	1,102	0.12	1,464
10-14	0.07	579	0.32	2,466	0.19	3,045
15-19	0.09	807	0.48	3,843	0.27	4,650
20-24	0.14	1,115	1.10	7,881	0.59	8,996
25-29	0.30	2,718	2.81	24,330	1.53	27,048
30-34	0.54	5,016	4.43	40,499	2.46	45,515
35-39	0.78	7,993	4.39	44,770	2.57	52,763
40-44	0.92	9,518	4.81	49,514	2.86	59,032
45-49	1.08	11,034	6.14	62,297	3.60	73,331
50-54	1.34	12,650	7.19	68,676	4.28	81,326
55-59	1.54	10,476	6.96	48,894	4.29	59,370
60-64	1.72	9,091	6.26	35,203	4.06	44,294
65-69	1.91	7,971	5.44	26,641	3.82	34,612
70-74	1.65	5,546	3.77	16,818	2.86	22,364
75-79	1.58	3,251	2.59	8,735	2.21	11,986
80-84	1.56	1,448	1.79	3,675	1.72	5,123
≥85	3.25	1,539	1.72	2,334	2.11	3,873
Total	0.78	92,832	3.72	449,137	2.26	541,969

^aIncidence, per population 1,000/year, adjusted by the number of population with same age.