为了解和掌握甘南州碘缺乏病的病情动态 ,提出防治依据。我们对甘南州碘缺乏病情况进行了调查 ,结果报告如下。调查对象及方法　派出经过统一培训、从事地方病工作 5年以上的专业人员 ,首次采用 ｐｐｓ(容量比例概率抽样 )抽样法抽取全州 30所小学 8～ 10岁学生 12 0 0名 ,并从 In order to understand and master Gannan state of iodine deficiency disease dynamics, put forward prevention and cure basis. We conducted an investigation of the condition of iodine deficiency in Gannan Prefecture and the results are reported below. Survey participants and methods The professionals who have been trained for more than five years in endemic diseases were sent out for the first time using the pps sampling method to extract 12 0 students aged 8 to 10 from 30 elementary schools in the state and