Abstract
Objective To investigate the control effect on iodine deficiency disorders(IDD) and iodine nutritional status of people in Qinghai Province. Methods According to the method of population proportionate sampling (PPS), 30 sample units from 25 counties (cities, districts) of 8 areas were selected to carry out IDD surveillance. One primary school was selected in each sample unit. Totally 50 children aged 8-10 from each primary school were sampled to examine thyroid volume, and edible salt samples from their home and their urine samples were collected and tested. Totally 20 pregnant women from townships near the selected schools were chosen to detect urinary iodine. Results Totally 1 607 children aged 8-10 were examined, and their goiter rate was 0.25% (4/1 607). Totally 1 552 salt samples were examined, and the median of salt iodine level was 25.8 mg/kg. The coverage rate of iodized salt was 93.8% (1 455/1 552), and the consuming rate of qualified iodized salt was 84.2% (1 307/1 552), non-iodized salt was 6.3% (97/1 552). Totally 1 582 urine samples of children aged 8-10 were examined, and the median of urinary iodine level was 209.4 μg/L, in which suitable urinary iodine (100-199 μg/L) accounted for 34.5% (545/1 582); 670 urine samples of pregnant women were examined, and the median of urinary iodine level was 133.3 μg/L, in which suitable urinary iodine (150-249 μg/L) accounted for 26.7% (179/670), and 56.3% (377/670) of this group was urinary iodine deficiency (< 150 μg/L). Conclusions The results have showed that the goiter rate and urinary iodine level of children aged 8-10 have reached the national standard of IDD elimination, while the residents consuming rate of qualified iodized salt is lower than the national standard(90%). In particular, pregnant women are iodine deficiency, they should be given more iodine. Key words: Iodine, deficiency diseases; Surveillance; Urine; Goiter; Endemic
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