Table 1.
Status of iodized salt used in household in Jiangsu province from 1997 to 2011.
Fig 1.
The geometric mean of thyroid volume (Tvol) and median urinary iodine concentration (right y-axis) in the surveys.
Body surface area (BSA) was used to adjust Tvol and slightly affected the geometric mean of Tvol.
Table 2.
Thyroid volume in children by ages and gender in each survey.
Fig 2.
Thyroid goiter rate (TGR) among children aged 8 to 10 in Jiangsu province from 1997 to 2011 based on the WHO sex- and BSA-specific reference criteria of 2007.
Fig 3.
Correlation between average thyroid volume (Tvol) and thyroid goiter rate (TGR) after elimination of IDD.
The numbers around points indicate the survey years. The data of TGRs and geometric means of Tvol from 2001 to 2011 were analyzed.
Fig 4.
Distribution of concentration of urinary iodine (UIC) in the surveys.
The UIC in each survey was categorized into 11 groups by UIC <100 μg/L, < 200 μg/L, etc. to < 1,000 μg/L and ≥1,000 μg/L. Each bar represents the percentage frequency of one group. The dashed lines show the position of UIC = 300 μg/L. The number above each bar is the median UIC in each survey (unit: μg/L). This Fig shows that the distribution of UIC was concentrated around the median value, and few proportions with either very low or very high values were observed after 2000.