目的了解天津市实施新盐碘标准后3类重点人群(孕妇、哺乳期妇女、8~10岁儿童)的碘营养水平,为盐碘含量的调整提供科学依据。方法于2012—2013年选择天津市6个区县,每区县选取2所小学,每所学校随机采集36名8~10岁儿童的随机尿样,并采集每名儿童家庭食用盐;每区县选取孕早、中、晚期的孕妇各30名,哺乳期妇女30名,采集其随机尿样;测定盐碘和尿碘。结果 8~10岁儿童、孕妇和哺乳期妇女尿碘中位数分别为180.0、127.2和85.8μg/L,尿碘水平由低到高依次为哺乳期妇女<孕妇<8~10岁儿童,其中不同地区儿童碘营养状况均处于适宜水平,孕妇均处于不足状态,沿海区县哺乳期妇女碘营养水平适宜,其他地区均不足。盐碘中位数为23.30 mg/kg。结论本次调查的天津市3类重点人群尿碘存在明显的人群和地区差异,孕妇和哺乳期妇女的碘营养有不足的趋势;盐碘中位数低于该市标准(30 mg/kg)。 Objective To understand the iodine nutrition of three kinds of key population (pregnant women, lactating women, children aged 8-10) after the implementation of the new salt iodine standard in Tianjin, so as to provide a scientific basis for the adjustment of salt iodine content. Methods In 2012-2013, 6 districts and counties in Tianjin were selected. Two primary schools were selected in each county. Each school randomly collected 36 random urine samples of children aged 8 to 10 years old and collected household salt for each child. Each district The county selected pregnant early, middle and late pregnant women each 30, breast-feeding women 30, collected random urine samples; determination of salt iodine and urinary iodine. Results The median urinary iodine of children aged 8-10 years, pregnant women and lactating women were 180.0, 127.2 and 85.8 μg / L, respectively. The urinary iodine levels from low to high were lactating women