Table 1. Prevalence of Thyroid Nodules in 2015.

	Total			Men			Women
	Population	Events	Prevalencea	Population	Events	Prevalencea	Population	Events	Prevalencea
Total	51,834,660	820,283	15.82	25,933,249	154,032	5.94	25,901,411	666,251	25.72
Age group, yr
≤9	4,619,384	2,237	0.48	2,375,043	607	0.26	2,244,341	1,630	0.73
10–19	5,709,599	10,049	1.76	2,977,410	2,665	0.90	2,732,189	7,384	2.70
20–29	6,881,546	31,148	4.53	3,643,304	4,970	1.36	3,238,242	26,178	8.08
30–39	7,824,337	91,382	11.68	4,019,283	14,997	3.73	3,805,054	76,385	20.07
40–49	8,871,241	169,997	19.16	4,502,350	27,918	6.20	4,368,891	142,079	32.52
50–59	8,332,932	248,945	29.87	4,184,758	43,247	10.33	4,148,174	205,698	49.59
60–69	5,064,740	173,674	34.29	2,457,128	36,997	15.06	2,607,612	136,677	52.41
70–79	3,153,746	76,976	24.41	1,352,287	18,560	13.72	1,801,459	58,416	32.43
≥80	1,377,135	15,875	11.53	421,686	4,071	9.65	955,449	11,804	12.35

^aPrevalence was calculated by dividing the number of prevalent cases by the total population and presented per 1,000 population.