淮南市位于安徽省中部偏北，地跨淮河两岸，五区一县。总人口近２００万。１９９５年底实施全民食盐加碘。按照《安徽省碘缺乏病防治监测方案》要求，本市分别于１９９６年、１９９７年及１９９８年进行３次碘缺乏病病情监测，结果如下。１　材料与方法１．１　按ＰＰＳ法随机 Huainan City, Anhui Province is located in the central north, across the Huaihe River, five districts and one county. The total population of nearly 2000000. The end of 1995 the implementation of universal salt iodization. According to the requirements of “Anhui iodine deficiency prevention and control monitoring program”, the city monitored iodine deficiency disorders three times in 1996, 1997 and 1998 respectively. The results are as follows. 1 Materials and Methods 1.1 random by PPS method