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为了解永定县碘缺乏病的病情动态，于１９９５年６月派出经过统一培训的１０名专业人员，按ＰＰＳ（容量比例概率抽样）抽样方法随机抽查３１所小学８～１０岁的学生１２４１名，并从被检学生家中采取食盐１１３５份和随机采集３４４名学生一次尿样进行检测。结果表明：甲状腺肿大３０５人，肿大率２４．６％，各年龄组男女和已服与未服碘丸学生甲状腺肿大情况无显著性差异（Ｐ＞０．０５）；盐碘浓度均值３１．９２ｍｇ／ｋｇ，＜２０ｍｇ／ｋｇ有３７９份，占３３．４％；＞１００μｇ／Ｌ３１１份，占９０．４１％，已服碘丸和未服碘丸学生尿碘浓度呈显著性差异（Ｐ＜０．０１）。提示：该县碘缺乏病病情回升。
In order to understand the dynamic state of iodine deficiency disorders in Yongding County, 10 professionals trained in uniform training were sent in June 1995 and 1241 pupils aged 8 to 10 were randomly selected according to the sampling method of PPS (Capacity Probability Probability Sampling) And 1135 samples of salt were collected from the students who were seized and 344 urine samples were collected randomly. The results showed that there were 305 goiter patients and 24.6% enlargement rate. There was no significant difference between the male and female goats and those who had taken or not taken iodized pills in all age groups (P> 0.05) 31.92mg / kg, <20mg / kg, 379, accounting for 33.4%;> 100μg / L311, accounting for 90.41% <0.01). Tip: The county iodine deficiency disease recovery.