Abstract
Note from Fluoride Action Network:
This is a duplicate study of Lu et al. (2000).
SUMMARY:
Sixty children, aged 10 to 12, were randomly selected for IQ testing from
an area with high fluoride (3.15 mg F/L) in the drinking water along with 58 control
children of the same age from a nearby low fluoride (0.37 mg F/L) area. The two areas
are located approximately 5 km apart in the Tianjin Xiqing District, and both have
similar normal iodine levels, living standards, access to medical facilities, economic
development, educational level, etc. A single individual using the C2 version of the
Chinese Raven Test did the IQ testing. The mean IQ scores were significantly
different: 92.27±20.45 in the high F area and 103.05±13.86 in the low F area (P<0.01).
Within the seven categories of the scores, there were significantly more borderline
and low IQs in the high F area (13/60) than in the low F area (2/58) (p<0.01).]
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The effects of endemic fluoride poisoning caused by coal burning on the physical development and intelligence of children.
Goal: To investigate the effects of endemic fluoride poisoning caused by coal burning on the physical development and intellectual ability of children. Method: Using random sampling from the relevant population, 176 fluorosis sufferers aged 7–12 (the subjects) were drawn from a heavily fluoride poisoned area of Zhijin County, with 50 children without dental
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Study of cognitive function impairment caused by chronic fluorosis.
Objective: To investigate whether an impairment in cognitive function exists in patients diagnosed with fluoride poisoning as well as its biological basis. Methods: Individuals suffering from fluoride poisoning from a high fluorine region were selected for the study group, while healthy individuals from a nonendemic region were selected as the control group. Using
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A Benchmark Dose Analysis for Maternal Pregnancy Urine-Fluoride and IQ in Children.
This article is a preprint and has not been peer-reviewed. It reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice. Abstract As a safe exposure level for fluoride in pregnancy has not been established, we used data from two prospective studies
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The effects of high levels of fluoride and iodine on intellectual ability and the metabolism of fluoride and iodine.
The authors carried out a study on the intellectual abilities and fluoride/iodine metabolism of children living in a high fluoride-high iodine area. Among the results: the percentage of the general population living in this fluoride/iodine-contaminated region that suffered from goiter (clinical thyroid enlargement) was 3.8%, the rate of children already showing some thyroid
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Relation Between Intelligence and COMT Gene Polymorphism in Children Aged 8-12 in the Endemic Fluorosis Area and Non-Endemic Fluorosis Area.
1.1 Subjects According to the principle that a selected population lives in a similar natural environment and has similar lifestyle and diet habits, one township in the endemic fluorosis area and one township in the non-endemic fluorosis area in a certain region were respectively selected as sites for population sampling. In
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