影响海岛成年居民尿碘水平的多因素分析

Analysis on Affective Factors of Adults' Urinary Iodine Concentration

目的 了解海岛居民的碘营养状况及影响尿碘水平的因素 ,评价补碘措施的意义及利弊。方法 对定海农村(食用碘盐 )和岱山农村 (不食用碘盐 )随机抽取 8个乡 2 0岁以上成年人入户调查 ,进行两样本按尿碘水平分层的描述性统计 ,并以尿碘水平为有序应变量在对各影响因素单因素卡方检验的基础上 ,作多因素非条件Logistic回归分析。结果 食用碘盐组 4 7 1%尿碘在 2 0 0 μg/L及以上 ,而不食用碘盐组 5 7 2 %尿碘在 <10 0 μg/L。不食用碘盐组 ,性别、人均年收入和饮食碘摄入在多因素分析中有显著性意义 (OR值分别为 0 6 85 ,1 2 2 4和 1 2 0 1)。结论 舟山海岛居民日常饮食不能满足机体碘需要 ,应对其补碘 ,但应适当下调碘盐含碘浓度 ,定期监测 ,使尿碘水平在理想碘营养状况的范围内。在不食用碘盐组 ,饮食碘改善碘营养状况可作为辅助手段。

Objective To investigate the island adults' iodine nutritional status and the affective factors of urinary iodine concentration and to evaluate the advantages and disadvantages of iodized salt prophylaxis.Methods A contrast study was carried out in 8 countries which were selected from Dinghai(iodized salt district)and Daishan(non-iodized salt district)of Zhoushan island by random sampling.Chi-squared test of contingency table and Kruslal-Wallis test were used to compare the qualitative data and quantitative data respectively.Ordinal regression was used to analyse the affective factors of urinary iodine concentration.Results In iodized salt district,the percent of urinary iodine concentration above 200μg/L was 47.1%,and in non-iodized salt district,the percent of urinary iodine concentration below 100μg/L was 57.2%.In non-iodized salt district,sex,average annual income and daily dietary intake was significant in the final regression model,the value of OR is 0 685,1.224 and 1.201 respectively.Conclusion In Zhoushan island,the daily iodine intake can't match the suggested 150μg/day,the measure of iodized salt prophylaxis is necessary,but the specificity of island diet should be considered,the concentration of iodine in salt should be decreased in order for the urinary iodine concentration within the ideal range.In non-iodized salt district,diary iodine intake could be an assist measure to improve the iodine nutritional status.