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目的 为了解和评价现行加碘盐浓度是否满足中度缺碘地区不同人群的碘营养需求和进一步调整碘盐浓度提供科学依据。方法 在中度缺碘地区各选择 1个市区 (城镇 )和农村作为调查点 ,调查 8～ 10岁学生、育龄妇女、孕妇、哺乳妇女及其婴幼儿的尿碘、哺乳妇女乳汁碘含量、学生甲状腺肿和家庭食盐碘含量。结果 盐碘中位数为 2 7.5 mg/ kg,碘盐覆盖率为 97.9% ,居民户合格碘盐食用率为 75 .5 %。人群尿碘中位数为 2 0 4.3μg/ L,8～ 10岁学生、婴幼儿、育龄妇女、哺乳妇女、孕妇的尿碘中位数分别为 2 86 .7、2 37.1、187.6、172 .6、12 5 .6μg/ L,不同人群间尿碘水平差异有非常显著意义 ( P <0 .0 0 1) ,婴幼儿和学生的尿碘明显高于其他 3种人群。县城哺乳妇女乳汁碘明显高于农村 ( P <0 .0 1)。结论 认为现行的加碘盐浓度足以保证 5种重点人群的碘营养需求 ,但学生和婴幼儿的碘营养水平却有偏高趋势 ,因此 ,建议将现行加碘盐浓度 ( 35± 15 ) m g/ kg下调为 ( 30± 10 )mg/ kg更为合适。
Objective To provide a scientific basis for understanding and evaluating whether the current iodized salt concentration meets the iodine nutrition needs of different populations in moderate iodine deficiency areas and to further adjust the concentration of iodized salt. Methods One urban area (urban area) and rural areas in moderate iodine deficiency areas were selected as the investigation points to investigate the milk iodine contents of urine iodine and lactation women aged 8-10, women of childbearing age, pregnant women, lactating women and their infants and young children. Student goiter and family salt iodine content. Results The median of salt iodine was 2 7.5 mg / kg, the coverage of iodized salt was 97.9%, and the consumption rate of qualified iodized salt of household was 75.5%. The median urinary iodine was 20 4.3 μg / L. The median urinary iodine for students aged 8-10, infants and toddlers, women of childbearing age, lactating women and pregnant women were respectively 2 86.7,2 37.1,187.6,172. There were significant differences in urinary iodine levels between different groups (P <0.01). The urinary iodine in infants and children was significantly higher than that in the other three groups. Milk iodine in county lactation women was significantly higher than that in rural areas (P <0.01). The conclusion is that the current iodized salt concentration is enough to ensure the iodine nutrition needs of five kinds of key populations, but the iodine nutrition level of students and infants and young children tends to be high. Therefore, it is suggested that the current iodized salt concentration (35 ± 15) mg / kg down to (30 ± 10) mg / kg is more appropriate.