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Iodine nutritional status of adults during a period of salt iodization
1School of Public Health, Zhejiang University, Hangzhou 310031, PR China. ck@zju.edu.cn
Background:
To measure the iodine nutritional status of island adults in Zhoushan, China.
Methods:
A comparison study was carried out in eight villages. These were selected from iodized salt and non-iodized salt districts of Zhoushan island by random sampling. The Mann-Whitney test was used to compare the urinary iodine concentration and dietary iodine intake between the two districts.
Results:
The median of urinary iodine concentration in the non-iodized salt group was 90 micrograms/l, which was lower than 194 micrograms/l in the iodized salt group (u = 14.673; p < 0.000), whereas the median of daily dietary iodine intake in the two groups was 128 and 147 micrograms, respectively (u = 1.847; p = 0.065). There was no significant correlation between dietary iodine intake and urinary iodine concentration (p = 0.095).
Conclusions:
Salt iodization is necessary. Special characteristics of the island diet should also be considered.
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