Fluoride 1996 Nov 29(4): 190-192

Effect of a High Fluoride Water Supply on Children's Intelligence

Zhao LB, Liang GH, Zhang DN, Wu XR

Lu-Liang Public Health Bureau, Shanxi 033000, China.

In Shanxi Province, China, children living in the endemic fluoride village of Sima (water supply F = 4.12 mg/L) located near Xiaoyi City had average IQ (97.69) significantly lower (p < 0.02) than children living to the north in the nonendemic village of Xinghua (F = 0.91 mg/L; average IQ = 105.21). These differences were not associated with gender, but the IQ scores were directly related to educational level of the parents.

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