2009-2010年重庆市8～10岁儿童尿碘特征分析

Analysis of urine iodine condition of children aged 8-10 from 2009 to 2010 in Chongqing municipal

目的了解重庆市碘营养状况,科学制定碘缺乏病防治对策。方法调查重庆市40个区县,每县随机抽取1所中心小学100名学生,采集尿液,采用砷铈催化分光光度法测定尿碘,计算中位数。结果检查8～10岁儿童尿碘4050人,尿碘中位数为246.00μg/L,碘含量≥100μg/L的尿样占88.07%。40个区县儿童尿碘中位数均大于100μg/L,中位数在100～300μg/L间33个,占82.5%;300μg/L以上7个,占17.5%。男女性别间及年龄间尿碘差异无统计学意义(P>0.05)。渝西、渝东、渝东南3类地区儿童尿碘中位数分别为223.9、270.0和256.6μg/L,差异有统计学意义(P<0.05)。经济欠发达和经济较好的2类地区以及榨菜生产和非榨菜生产2类地区儿童尿碘差异亦有统计学意义(P<0.05)。结论重庆市儿童碘营养状况良好,但部分地区和儿童可能存在碘营养过剩。

Objective To examine the level of urinary iodine and provide evidence for the prevention and control of iodine deficiency disorder. Method Urine samples from the primary school students of 40 counties in Chongqing were collected and the level of urinary iodine was determined using arsenic Ce catalytic spectrophotometry method. Results Samples from 4 050 children aged between 8-10 years old were examined. The median concentration of urinary iodine was 246.00 μg/L and 88.07% of samples had concentration of urinary iodine≥100 μg/L. 33 out of 40 counties （82.5%） had a median concentration of urinary iodine between 100-300 μg/L; and the samples from 7 counties（17.5%） had the concentration of ≥300 μg/L. There was no significant difference among the various age groups（P0.05） and between male and female subjects（P0.05）. The median concentration of urinary iodine of children living in the western, eastern and southern regions was 223.9,270.0 and 256.6 μg/L, respectively, and the different was significant （P0.05）. There was a significant difference between the undeveloped and economically developed areas（P0.05）. A significant different was also observed between the preserved vegetable and non-preserved vegetable production areas（P0.05）. Conclusions There was no iodine deficiency in the students living in Chongqing. Excessive iodine intake may be a problem in some areas.