Abstract: Objective To ifnd out the effects of different intervenes on the urinary iodine level in the children aged 8-10 in iodine-deficient areas. Methods At different times, we took different intervenes in the school children aged 8-10, such as iodized salt intervention, iodized salt with iodized oil intervention, synthesis intervention and so on. With arsenic cerium catalytic spectrophotometric method for testing children's urine, we observed the effects of different interventions on the children's urinary iodine level. Results Before the intervention, Children’s urinary iodine level was low, and it didn’t meet the standard of eliminating national Iodine Deifciency Disorders. However, after the iodized salt intervention, children’s urinary iodine level was improved, and it reached the standard of eliminating national Iodine Deifciency Disorders. After the iodized salt with iodized oil intervention, the children’s urinary iodine level had a further improvement, median urinary iodine was in a suitable range. Adopting comprehensive intervention reinforces children's urinary iodine levels and the median urinary iodine was always in the appropriate range. The differences of urinary iodine level in different intervention stages had statistical significance(P<0.01). Conclusion It is an effective measures to improve the level of children’s iodine nutrition in iodine-deficient area with iodized salt intervention.

Key words: intervention, iodine-deficient areas, 8 to 10 year children, urinary iodine levels