Abstract:
Objectives To analyze the urinary iodine level of children aged 8~10 years in Lanzhou in 2016, and provide reference for improving the iodine nutritional status of children.
Methods Based on the stratified random sampling method, 200 children aged 8~10 were selected from eight counties in Lanzhou to investigate the urinary iodine level of children, the coverage of iodized salt in local residents and the qualification of iodized salt. The level of urinary iodine was measured by arsenic cerium catalytic spectrophotometry assay, and the iodine in salt was detected by direct titration method.
Results The median of urinary iodine concentration in school-aged children in Lanzhou was 203.85 μg/L, the difference of urinary iodine among eight counties was statistically significant (H=60.655, P < 0.05). The median of iodine content in salt was 23.00 mg/kg, the difference among eight counties was statistically significant (H=263.231, P < 0.05). The coverage rate of iodized salt was 98.5%, but the consumption rate of qualified iodized salt was 89.6%, which was lower than the standard limit of the eligible iodine consumption rate (more than 90%) for residents.
Conclusions The iodine nutritional status of 8~10 year-old children in Lanzhou in 2016 was appropriate, the urinary iodine level was in the normal range. The qualified rate of iodized salt in some counties was lower than that of the national standard limit, more attention should be paid to improve the qualification of iodized salt.
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