Iodine nutrition status of pregnant women in Xiamen City after adjusting iodized salt concentration
- 公共卫生－已发表论文 
目的掌握gb 26878-2011《食用盐碘含量》标准执行后,厦门市妊娠期妇女碘营养状况,为卫生策略的制定提供依据。方法选择厦门市翔安区新店镇为调查点,调查妊娠期妇女食用新标准碘盐前后家中的碘盐覆盖率、合格碘盐食用率、尿碘、尿比重水平。结果基线调查及新标准实施后第1到第5次评估,妊娠期妇女家庭碘盐覆盖率均达到100%,盐碘中位数分别为27.8、25.7、24.3、23.7、24.3和25.8 Mg/kg,5次评估的碘盐含量均比基线调查明显减少(均P<0.01);基线调查及5次评估测得尿碘中位数分别为103.8、128.5、138.9、100.2、97.1和96.2μg/l,第2次自评尿碘含量比基线调查高(P<0.05),第1、第3、第4、第5次评估的尿碘水平与基线调查尿碘水平差异无统计学意义(均P>0.05);基线调查及5次评估测得尿比重均数分别为1.0123、1.0153、1.0180、1.0143、1.0141和1.0132。第1、2、3次评估的尿比重水平均高于基线调查尿比重水平(均P<0.05),但第4、第5次评估的尿比重水平与基线调查间差异均无统计学意义(均P>0.05)。结论新标准实施后,妊娠期妇女家中食盐含碘量显著减少,新标准实施前后妊娠期妇女均处于碘营养不足状态,需加强该人群碘营养,保障下一代健康。[Objective]To understand the iodine nutrition status of pregnant women after implementation of‘Edible Salt Iodine Content'( GB26878-2011),and provide evidence for developing health policy.[Methods]The coverage rate of iodized salt,proportion of households using adequately iodized salt,urine-iodine and specific gravity of urine in pregnant women were investigated in Xindian Town of Xiang'an District in Xiamen City which was chosen as the research spot.[Results]In the baseline investigation and during the first-fifth self-assessment stage after carrying out the new standards,the coverage rates of iodized salt were all 100% and the iodine median value in pregnant women was 27.8 mg / kg,25.7 mg / kg,24.3 mg / kg,23.7 mg / kg,24.3 mg / kg and25.8 mg / kg,respectively.The iodine contents in the first-fifth selfassessment stage were all less than that in the baseline survey( all P < 0.01).The urinary iodine median value in pregnant women in the baseline investigation and the first-fifth assessment was103.8 μg / L,128.5 μg / L,138.9 μg / L,100.2 μg / L,97.1 μg / L,and 96.2 μg / L respectively.The urinary iodine content in the second assessment stage was higher than that in the baseline survey( P < 0.05).However,there were no significant differences between the first,the third,the forth,the fifth self-assessment stage and the baseline survey,respectively( all P > 0.05).The proportion of urine in pregnant women in the baseline investigation and the first- fifth self-assessment stage was 1.012 3,1.015 3,1.018 0,1.014 3,1.014 1 and 1.013 2 respectively.The proportions of urine in the first-third self-assessment stage were all higher than the baseline survey( all P < 0.05),and that of the forth and fifth self-assessment stage was not significantly different with the baseline survey( all P > 0.05).[Conclusion]After the implementation of the new standard,the iodinated content in salt in pregnant households has been reduced significantly.But the pregnant women are in iodine malnutrition before and after implementation of the new standard.It is necessary to strengthen the iodine nutrition for the health of the fetus.