Iodine status of 8 to 10 years old children within 20 years following compulsory salt iodization policy in Shanghai, China

Table 1 Household SIC of 8 to 10-year old children

Standard of SIC	Year	Sample size	Household coverage with iodized salt (%)	SIC (mg/kg) (\( \overline{\mathrm{x}} \)±s)
20–60 mg/kg	1999	1320	94.6	43.8 ± 16.3
20–50 mg/kg	2005	1223	98.6	32.9 ± 4.0
20–50 mg/kg	2011	1234	92.3	28.9 ± 5.8
21–39 mg/kg	2014	1510	85.6	25.8 ± 9.2
21–39 mg/kg	2017	1215	76.5	24.3 ± 5.6

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