天津市于全民食盐加碘之前的1994年对全市81所学校的8590名8～10岁学龄儿童碘营养状况的调查结果表明,全市甲肿率为32.6％,市区平均为38.6％;全市平均尿碘水平为96.06μg/L,市区为58.4μg/L;全市饮用水碘平均含量为39.8μg/L,市区为5.6±3.6μg/L;同年对市区新生儿全血TSH检测结果发现15％的新生儿TSH水平>5mu/L。上述各项指标均显示天津市的碘营养水平远远没有达到国家消除碘缺乏病的标准,尤其市区人群仍面临缺碘 Before the universal salt iodization in Tianjin, 8590 pupils aged 8 to 10 from 81 school-age children in iodine nutrition survey in Ningbo showed that the rate of iodine deficiency in the city was 32.6% and the urban area was 38.6% Urinary iodine level was 96.06μg / L in urban area and 58.4μg / L in urban area. The average iodine content in drinking water in the city was 39.8μg / L, and urban area was 5.6 ± 3.6μg / L. In the same year, 15% of newborns found TSH levels> 5mu / L. The above indicators show that the level of iodine nutrition in Tianjin is far below the national standard for eliminating iodine deficiency disorders. In particular, urban residents are still suffering from iodine deficiency