我国《地方性甲状腺肿防治工作标准》(试行)(以下简称《国家标准》)。规定地方性甲状腺肿(以下简称“地甲病”)病区的划分标准是,以乡为单位居民甲状腺肿患病率大于3%,或7～14岁中小学生肿大率大于20%。人群中,随机抽样健康成年人五十人以上,尿碘平均值低于50微克/克肌酐,可作为确定病区的参考指标。基本控制和基本消灭指标为,在确保以食盐加碘为重点的综合措施落实后,以乡为单位居民患病率,重病区等于或小 China’s “Local goiter prevention and control work standards” (Trial) (hereinafter referred to as “national standards”). The criteria for delineating endemic goitre (hereinafter referred to as “metrorrhagia”) are that the prevalence of goitre is more than 3% for residents of the township or more than 20% for primary and middle school students aged 7 to 14. In the population, more than 50 healthy adults were randomly sampled and the urinary iodine average was less than 50 μg / kg creatinine, which could serve as a reference index for the identification of the ward. The basic control and the basic eradication index are that after comprehensive measures such as ensuring salt iodization as the focal point are implemented, the prevalence of residents in rural areas is equal to or smaller