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目的了解西安市学龄儿童碘营养状况,为调整碘盐含量、科学补碘提供依据。方法每个区县分农村、城市两层,每层抽取有效样本量60例。农村按东、西、南、北、中划分5个抽样片区,在东、西、南、北片区各随机抽取1所乡镇中心小学,在每所小学中随机抽取8～10岁学生15名(每个年龄组5人,男女各半)共计60例。城市至少在2所以上的小学中,随机抽取城市户口8～10岁学生共计60例(每个年龄组20人,男女各半),其中新城、莲湖、碑林3个城区只监测城市60例,采集随机一次性尿样5 ml进行检测。结果全市14个区县共采集尿样1 500份,尿碘中位数为289.5μg/L,其中<50μg/L的有32份,占2.13%;50～99μg/L的有84份,占5.60%;100～199μg/L的有290份,占19.33%;200～300μg/L的有390份,占26.00%;>300μg/L的有704份,占46.93%。其中农村660份,尿碘中位数为311μg/L;城市840份,尿碘中位数为275.5μg/L。男性757人,尿碘中位数为305μg/L;女性743人,尿碘中位数为265μg/L。共抽查8岁儿童495名,中位数为284μg/L;9岁儿童500名,中位数为281μg/L;10岁儿童505名,中位数为296μg/L。结论西安市学龄儿童碘营养状况良好,均达到了国家消除碘缺乏病标准,但14个区县均处在超足碘摄入状态,虽然陕西省2012年3月份下调了食盐碘含量,但今后还须严密监测此项工作。
Objective To understand the status of iodine nutrition in school-age children in Xi’an and to provide basis for adjusting iodine content and scientific supplementing iodine. Methods Each district and county is divided into rural area and urban area with two effective sample sizes of 60 cases. The rural areas are divided into five sampling areas according to the east, west, south, north and north. One township primary school is randomly selected from each of the eastern, western, southern and northern regions. Fifteen students aged 8 to 10 are randomly selected from each primary school Each age group of 5 people, half men and women) a total of 60 cases. In at least 2 primary schools in the city, there are 60 randomly selected city residents aged from 8 to 10 (20 in each age group and half in both sexes), of which only 60 in the three cities of Xincheng, Lianhu and Beilin , Collecting a one-time random urine samples for testing 5 ml. Results A total of 1 500 urinary samples were collected and the urinary iodine median was 289.5 μg / L in 14 districts and counties in the city, of which 32 were less than 50 μg / L, accounting for 2.13%, 84 were 50 ~ 99 μg / L, accounting for 5.60%; 290 to 100 ~ 199μg / L, accounting for 19.33%; 390 to 200 ~ 300μg / L, accounting for 26.00%; 704 to> 300μg / L, accounting for 46.93%. 660 in rural areas, the median urinary iodine 311μg / L; 840 cities, urinary iodine median 275.5μg / L. There were 757 males with a median urinary iodine of 305 μg / L, 743 females and a median urine iodine concentration of 265 μg / L. A total of 495 children aged 8 years were selected, with a median of 284 μg / L; 500 children aged 9 years, with a median of 281 μg / L; and 505 children aged 10 years, with a median of 296 μg / L. Conclusions The iodine nutrition of school-age children in Xi’an is in good condition and both reached the national standard of eliminating iodine deficiency disorders. However, all the 14 districts and counties were in the state of iodine intake. Although Shaanxi Province lowered iodine content in salt in March 2012, This work must also be closely monitored.