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在已经加碘盐防治地区，将７～１４岁儿童按２岁一组分为Ａ、Ｂ、Ｃ、Ｄ４组。分别测定受试者２４ｈ和下午一次随机尿碘值。经分析比较尿碘值的各种表示方法，看出４组儿童尿碘值采用随机尿碘ｕｇ／ｇＣｒ中位数值ｘ肌酐系数值表示方法与其尿碘ｕｇ／２４ｈ中位数值差异无显著性，因此，前者被认为是切合实际的尿碘表示方法。随着年龄增长Ｃ、Ｄ两组儿童２４ｈ尿碘值大于Ａ、Ｂ两组。若以４岁以上儿童碘供应量下限值为７５ｕｇ／ｄ为标准，河坝乡虽经加碘防治，但１３～１４岁儿童尿碘水平达下限值者仅占５１．２％，表明仍供碘不足。
In areas where iodized salt has been controlled, children aged 7 to 14 years old will be divided into groups A, B, C and D4 at the age of 2 years. Subjects were measured 24h and afternoon, respectively, a random urine iodine value. After analyzing and comparing various expressions of urinary iodine value, it was found that the urinary iodine value of the four groups of children showed no significant difference with the urinary ug / ug / 24h median value of ug / gCr median urinary creatinine value, Therefore, the former is considered to be realistic urinary iodine representation. With age C, D two groups of children 24h urinary iodine value than A, B two groups. If the children over the age of 4 iodine supply for the lower limit of 75ug / d as a standard, Heba Township despite iodized control, but 13 to 14-year-old children with urinary iodine levels reached the lower limit of only 51.2%, indicating Iodine is still inadequate.