Abstract
Objective: Investigate the effect of high fluoride exposure on the level of intelligence in children.
Method: In May 2006, 42 children from a high endemic fluorosis group and 37 children from the control area (who have been consuming low-fluoride water after water improvement schemes) were chosen for the test. They are all from a primary school in Pucheng county, Shaanxi province. Their level of intelligence was tested, and a test for dental fluorosis was conducted using Dean’s method, and the level of fluoride in urine was determined with a fluoride ion selective method.
Results: The average intelligence level of the children in the high fluoride group (96.11 + 12.00) was lower than that of the control group (98.41 + 14.75). We have not found any children with an intelligence level exceeding a level deemed as excellent; as for the intelligence distribution in these groups, there is little statistical significance. There was a negative correlation between the urine fluoride concentration and the level of intelligence in children (P>0.05).
Conclusion: Exposure to high levels of fluoride is likely to cause a certain level of harm.
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The relationships between thyroid-stimulating hormone and/or dopamine levels in peripheral blood and IQ in children with different urinary iodine concentrations.
Highlights TSH is not related IQ in children with different urinary iodine concentrations. Dopamine in plasma is unrelated to IQ in children with adequate or excessive iodine. Dopamine has positive correlation with intelligence in iodine deficiency group. The interaction between dopamine in plasma and TSH is not related to
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Level of fluoride and arsenic in household shallow well water in Wamiao and Xinhuai villages in Jiangsu Province, China
After previously excluding iodine and lead as confounding factors, the aim of the present study, conducted in June 2013, was to consider whether arsenic was a confounding factor in the studies of children’s intelligence in Wamiao and Xinhuai. Fluoride and arsenic levels were measured in water samples from the 37
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The effect of high levels of arsenic and fluoride on the development of children’s intelligence.
In the fields of toxicology, histology, physiology and biochemistry, numerous research and reports have already been conducted on the poisonous effect of arsenic poisoning, fluoride poisoning, as well as the combined effect of arsenic and fluoride poisoning. Progress has been made likewise in relevant medical treatment, clinical diagnosis and water clean-up prevention
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Arsenic and fluoride exposure in drinking water: children’s IQ and growth in Shanyin County, Shanxi Province, China.
Background: Recently, in a cross-sectional study of 201 children in Araihazar, Bangladesh, exposure to arsenic (As) in drinking water has been shown to lower the scores on tests that measure children’s intellectual function before and after adjustment for sociodemographic features. Objectives: We investigated the effects of As and fluoride exposure on
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Investigation of intelligence quotient in 9-12-year-old children exposed to high- and low-drinking water fluoride in west Azerbaijan province, Iran
In order to investigate the relationship between fluoride (F) in drinking water and children’s intelligence quotient (IQ), 39 9–12-year-old children in West Azerbaijan, were selected and their IQ measured using the Iranian version of the RB Cattell test. The study cases were 19 children living in a high-drinking water F
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NRC (2006): Fluoride's Neurotoxicity and Neurobehavioral Effects
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