连续三年对102名8~10岁小学生进行尿碘和智商测定,基线调查作智商与尿碘的相关分析,r=0.1324,P>0.05,提示不能认为尿碘与智商有直线相关关系。通过基线调查与终末调查智商比较,智商有非常显著性差异,即补碘后的智商高于补碘前(u=-4.391,P<0.001);两者尿碘中位数的x2检查亦有非常显著性差异,即终末调查的尿碘高于基线调查的尿碘(x2=63.84,P<0.005)。基线调查与终末调查比较,观察组尿碘有非常显著性差异,即终末调查尿碘高于基线调查(x2=52.13,P<0.005);智商亦有非常显著性差异,即终末调查增长明显(t=-3.708,P<0.001)。对照组尿碘亦有非显著性差异(x2=50.89,P<0.005),与全民普遍食用碘盐有关。不认为终末调查与基线调查智商比较两者有所不同(t=0.8410,0.2 0.05, suggesting that there was a linear relationship between urinary iodine and IQ. IQ was significantly different between baseline and final surveys, indicating that the IQ after iodine supplementation was higher than that before iodine supplementation (u = -4.391, P <0.001). The median x2 of urinary iodine There was a very significant difference, that is, urinary iodine at the end of the survey was higher than urinary iodine (x2 = 63.84, P <0.005) at baseline. There were significant differences in urinary iodine in the observation group between the baseline survey and the final survey, that is, the urinary iodine in the final survey was higher than the baseline survey (x2 = 52.13, P <0.005); IQ also had a very significant difference Increase significantly (t = -3.708, P <0.001). Urinary iodine in the control group also had no significant difference (x2 = 50.89, P <0.005), and the general population of iodized salt. Do not think the terminal survey and baseline survey IQ difference between the two (t = 0.8410,0.2