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目的了解新标准碘盐实施后,西安市学龄儿童碘营养状况,为合理使用碘盐预防碘缺乏病提供依据。方法西安市每个区(县)按东、西、南、北、中划分5个抽样片区,在每个片区各随机抽取1个乡(镇或街办),在所抽取的乡(镇或街办)各随机抽取1所小学。在所抽取的小学各随机抽取40名8~10周岁儿童(男、女各半),每区(县)共计200名,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2 800份,尿碘中位数为264μg/L,其中<50μg/L的141份,占5.04%;50~99.9μg/L的有189份,占6.75%;100~199.9μg/L的有580份,占20.71%;200~299.9μg/L的有740份,占26.43%;≥300μg/L的有1 150份,占41.07%。其中男性1 403人,尿碘中位数为273.0μg/L;女性1 397人,尿碘中位数为257.0μg/L,男性尿碘水平大于女性(P<0.05)。共抽查8岁儿童863名,尿碘中位数为269.0μg/L;9岁儿童1 024名,尿碘中位数为247.0μg/L;10岁儿童913名,尿碘中位数为269.0μg/L,不同年龄组儿童尿碘中位数差异无统计学意义(P>0.05)。结论西安市学龄儿童碘营养状况良好,14个区(县)均达到了国家《消除碘缺乏病标准》,但仍处在超适量碘摄入状态,新标准碘盐是否适宜,还需进一步进行监测。
Objective To understand the iodine nutrition status of school-aged children in Xi’an after the implementation of the new standard iodized salt, and provide the basis for the rational use of iodized salt in preventing iodine deficiency. Methods Each district (county) in Xi’an was divided into 5 sampling areas according to East, West, South, North and North, and 1 rural (town or street) was randomly selected in each area. Street Office) randomly selected a primary school. A total of 40 children aged 8 to 10 years (half male and half female) were randomly selected from each primary school. A total of 200 students in each district (county) received 5 ml randomized urine samples for testing. Results A total of 2 800 urinary samples were collected in 14 districts and counties of the city, with a median urinary iodine of 264 μg / L, of which 141 were less than 50 μg / L, accounting for 5.04%, 189 were 50 ~ 99.9 μg / L, accounting for 6.75 %; 100 to 199.9μg / L of 580, accounting for 20.71%; 200 ~ 299.9μg / L of 740, accounting for 26.43%; ≥ 300μg / L of 1 150, accounting for 41.07%. Among them, 1,340 males had a median urinary iodine of 273.0 μg / L; 1 397 females had a median urinary iodine of 257.0 μg / L, and urinary iodine levels were higher in males than in females (P <0.05). A total of 863 children aged 8 years were enrolled in this study. The median urinary iodine was 269.0 μg / L; 1 024 children aged 9 years and median urinary iodine 247.0 μg / L; 913 children aged 10 years; median urinary iodine was 269.0 μg / L, there was no significant difference in urinary iodine between children of different ages (P> 0.05). Conclusion The iodine nutrition of school-age children in Xi’an is in good condition. All 14 districts and counties have reached the national standard of eliminating iodine deficiency deficiency, but they are still in the state of excess iodine intake. Whether the new standard iodine salt is suitable needs to be further carried out monitor.