Zhang Gen-hong, Li Su-mei, Zheng He-ming, Wang Chuan-gang, Liu Lie-jun, Li Xiu-wei, Zhang Hao-feng, Ke Geng-yin, Ma Jian-guo, Yang Jin, Ma Ying, Liu Jin-wen
Henan Provincial Institute for Health Inspection and Supervision, Zhengzhou 450003, China.
Zhonghua Liu Xing Bing Xue Za Zhi. 2007 Mar;28(3):241-5.
To investigate the amount of daily iodine intake in the diet of the target population in drinking water with areas of excessive iodine after stopping supply of iodized salt, to provide evidence for developing strategies on control and prevention of excessive iodine.
335 objectives were selected by a two-stage sampling method in 4 administrative villages with different iodine contents in drinking water. The amount of drinking water intake and dietary survey for 335 people were done by a door-to-door survey,while the iodine contents in the drinking water of each selected family, local staple food and vegetable were measured.
The median level of iodine in drinking water was 431.5 microg/L while the daily amount of iodine intake among the three groups of waters with different iodine contents were all greater than RNI. The daily iodine intake of local people was all greater than UL in the areas where the water iodine contents were more than 300 microg/L. It was of statistical sense that the iodine mean intake per capita per day of the three groups differed at different water iodine levels (P < 0.01). The iodine mean intake per capita per day of the three groups of different water iodine levels increased along with water iodine and showed a uptrend (P < 0.01). 83.2%-98.7% of the daily iodine intake of the three groups was from drinking water and 1.3%-16.8% came from food. The iodine intake had high-positive correlation relation with the content of water iodine (P < 0.01).
It was concluded that drinking water was the main source of iodine intake in areas with iodine excessive water by the percentage of over 80%. It was necessary to adopt measures to improve the quality of water to decrease the iodine content other than just stopping supplies of iodized salt in the areas where the water iodine contents were greater than 300 microg/L, in order to prevent and control excessive intake of iodine.
调查停供碘盐后高碘地区目标人群饮食中每日碘摄入量，为制定高碘防治策略提供依据。
采用两阶段抽样方法，在4个饮用水碘含量不同的行政村选取335名对象。对335人进行入户饮水摄入量和膳食调查，同时测定每户饮用水、当地主粮及蔬菜碘含量。
饮用水碘中位数水平为431.5μg/L，不同碘含量的3组水碘人群每日碘摄入量均高于推荐摄入量。水碘含量>300μg/L地区居民每日碘摄入量均高于可耐受最高摄入量。3组不同水碘水平人群人均每日碘摄入量差异有统计学意义（P<0.01）。3组不同水碘水平人群人均每日碘摄入量随水碘含量升高呈上升趋势（P<0.01）。3组人群每日碘摄入量83.2%～98.7%来自饮水，1.3%～16.8%来自食物。碘摄入量与水碘含量呈高度正相关（P<0.01）。
水碘>300μg/L地区人群碘摄入80%以上来源于饮水。在该地区除停供碘盐外，应采取措施改善水质降低碘含量，以防控碘过量摄入。
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