天津市非水源性高碘地区成人碘营养状况及总膳食碘折算方法

  目的  了解天津市非水源性高碘地区成人居民碘营养状况及来源分布，并比较3 d膳食调查法和24 h尿碘法折算总膳食碘的方法学差异。  方法  根据中国成人慢性病与营养监测方案，在天津市河西区、南开区、红桥区、武清区、津南区、宝坻区、蓟州区共计调查1 634名成人，使用3 d膳食回顾法和调味品称重法相结合获得总膳食碘状况，描述居民碘营养状况及各部分碘的贡献率，从中随机抽取403名调查者收集24 h尿液进行尿碘检测，比较3 d膳食调查法和尿碘折算法估计总膳食碘的方法学差异。  结果  天津市非水源性高碘地区成人居民总膳食碘摄入量为207.13 μg/标准人日，70.3%的被调查者处于碘适宜状态；盐碘是总膳食碘最主要的来源（78.2%），其次是食物碘（13.2%）和水碘（8.6%）；整体上看，3 d膳食调查法比24 h尿碘折算法高估约10%。  结论  天津市非水源性高碘地区成人居民碘营养状况总体处于适宜水平，盐碘是膳食碘最主要的来源，3 d膳食调查法和24 h尿碘折算法估计总膳食碘摄入量差异不大。

Study on iodine nutritional status and total dietary iodine conversion methods of Tianjin adults from non-water-borne high iodine areas

  Objective  To understand the iodine nutritional status and source distribution of residents aged 18 and above in non-water-borne high iodine areas in Tianjin, and compare the methodological difference between the 3 d dietary survey method and the 24 h urine iodine method when calculate total dietary iodine.  Methods  According to the Chinese adult chronic disease and nutrition surveillance program, a total of 1 634 inhabitants aged 18 and above were enrolled from Hexi, Nankai, Hongqiao, Wuqing, Jinnan, Baodi and Jizhou district of Tianjin. The total dietary iodine intake was obtained with 3 d dietary recall and condiment weighing method, And the iodine nutritional status of adult residents in Tianjin and iodine contribution rate of each part were described.403 investigators were randomly selected from the 1 634 inhabitants mentioned above for 24 h urine iodine concentration detection, and the difference between 3 d dietary survey method and urine iodine conversion method when calculate total dietary iodine were compared.  Results  The median dietary iodine intake of adult residents in non-water-borne high iodine areas of Tianjin was 207.13 μg/standard person day, 70.3%respondents were in iodine adequate state. It was found that salt iodine is the main source of total dietary iodine (78.2%), followed by food iodine (13.2%) and water iodine (8.6%). Overall, the dietary iodine intake estimated by 3 d dietary survey method was higher about 10% compared with the result estimated by 24 h urine iodine concentration.  Conclusions  The adults in the non-water-borne high iodine areas in Tianjin was generally in iodine adequate state. Salt iodine is still the main source of dietary iodine, and little difference is found about the total dietary iodine intake estimated by 3 d dietary survey and 24 h urine iodine conversion method.