Abstract
The Chinese Binet IQ Test was used to investigate the IQs of 7–13 year- old children suffering from dental fluorosis, living and attending school in an area with coal burning-related fluoride poisoning. The average IQ of these children was found to be markedly lower than in the control area, and the number of children classified as having low intelligence was significantly higher. For both groups, IQ and serum fluoride show a negative correlation (r = –0.205).
Translated by Julian Brooke for the Fluoride Action Network and published with the concurrence of the Chinese Journal of Endemiology 1991;10(2):98-100 in the journal Fluoride.
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Relation between dental fluorosis and intelligence quotient in school children of Bagalkot district.
This study was conducted on 160 children, in the Bagalkot district of Karnataka state between August and October 2010, with the aim of finding out if there is a relation between dental fluorosis status and Intelligence Quotient (IQ). Children were categorized as, those suffering from dental fluorosis and those not
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Dose-response analyses of the 27 human developmental neurotoxicity studies ranked highest quality by National Toxicology Program (NTP) systematic review.
BACKGROUND AND AIM: The National Toxicology Program (NTP) has been conducting a systematic review of the evidence for fluoride’s neurotoxicity. Drafts of the NTP report conclude fluoride is a presumed hazard for developmental neurotoxicity, but have not included rigorous dose-response analyses to estimate a safe dose. This is of great
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The impact of endemic fluorosis caused by the burning of coal on the development of intelligence in children.
Objective: To explore the effect of endemic fluorosis caused by coal burning on the level of intelligence in children. The Method: We randomly selected 20 school children from 4 areas between the ages of 8[1]12, whose characteristics fit the scope of our research. They were chosen from slight, moderate, and severe endemic
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Letter to the Editor: IQ of 9-12 year-old children in high and low-drinking water fluoride areas in West Axerbaijan Province, Iran: Further information on the two villages in the study and the confounding factors considered.
In a critique of our study1 on the IQ of 9–12-year-old children in high- and low drinking water fluoride (F) areas in West Azerbaijan province, Iran, Dr Ken Perrott questioned whether possible confounding factors in the two villages, such as the rural status and parental educational levels, were adequately considered.2 Perrott’s
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Relationship between Drinking Water Fluoride and Intelligence Quotient in Egyptian School Children.
Background: Fluoridation of drinking water, despite being regarded as one of the top ten public health achievements of the twentieth century, has remained a much more debated concept. Excessive fluoride intake during infancy and early childhood causes a number of irreversible structural and functional changes in the CNS leading to
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