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目的:探讨不同地区孕妇环境碘来源(EIRs)和适宜的食盐加碘量。方法:在2012年食盐加碘含量调整前,调查江苏省吴江市、如东县、新沂市及睢宁县4地各1个乡镇孕妇共计1 044人,采集孕妇家庭盐碘及孕妇清晨空腹尿样测定碘含量,采用3日称量法对日人均食盐量进行调查,同时采集本地区代表性水样检测碘含量,测算孕妇每日碘摄入量、加碘盐供给碘量、EIRs和适宜食盐加碘量。结果:4地在食盐加碘含量调整前,孕妇尿碘中位数为234.7~323.0μg/L,每日碘摄入量为350~500μg/d。不同地区孕妇人群EIRs差别明显,介于136.53~262.86μg/d之间,尚不足以满足每日碘摄入量目标值。由EIRs测算的吴江市和新沂市孕妇人群适宜食盐加碘量平均数均为20 mg/kg,睢宁县为18.64 mg/kg,如东县为25 mg/kg。结论:在2012年食盐加碘含量调整前,4个地区孕妇碘营养充足、安全,但可适当下调食盐加碘量,依据EIRs可方便有效地推算人群适宜食盐加碘量。
Objective: To investigate the environmental sources of iodine (EIRs) and suitable salt iodization in pregnant women in different areas. Methods: Before adjusting the content of iodized salt in 2012, a total of 1044 pregnant women from one township in Wujiang City, Rudong County, Xinyi City and Suining County of Jiangsu Province were surveyed to survey salt iodine in pregnant women and early fasting urine Sample determination of iodine content, the use of 3-day weighing method to measure the daily average amount of salt in the country at the same time collecting representative of the region to detect iodine content of water samples to measure daily intake of iodine iodine, iodized salt iodization, EIRs and appropriate Salt iodization. Results: The median urinary iodine of pregnant women was 234.7 ~ 323.0μg / L before adjustment of salt iodine content, and the daily iodine intake was 350 ~ 500μg / d. EIRs in different regions of pregnant women were significantly different, ranging between 136.53 ~ 262.86μg / d, not enough to meet the target daily intake of iodine. The average number of suitable salt iodization for pregnant women in Wujiang City and Xinyi City measured by EIRs was 20 mg / kg, Suining was 18.64 mg / kg, and Rudong was 25 mg / kg. Conclusion: Before adjustment of salt iodine content in 2012, iodine nutrition of pregnant women in four districts was adequate and safe, but iodized salt could be lowered appropriately. According to EIRs, iodine dosage could be calculated easily and effectively.