by Brenda Baletti, Ph.D.,Childrens Health Defense:
Experts who analyzed a recent study claiming thatfluoride exposure from drinking waterdoesn’t affect IQ toldThe Defenderthe study was deceptive and relied on a flawed methodology.
The “highly anticipated long-term study,” published April 13 inProceedings of the National Academy of Sciences(PNAS), was widely cited by media and proponents of water fluoridation as evidence that there isno difference in IQbetween people who drank water containing fluoride at the level currently recommended by U.S. public health agencies and people who didn’t.
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But Chris Neurath — a research director for the American Environmental Health Studies Project who analyzed the study — identified flaws in the data used for the study and the authors’ conclusions.
Neurath said that one of the “most deceptive parts” of both themediacoverage and the study itself was the claim that it studied community water fluoridation, and that it was a comparison between two groups — people exposed to fluoridation and people who weren’t.
Neurath found that the authors didn’t actuallymeasure how much fluoridestudy participants consumed.
They also didn’t study people who were exposed to fluoride as neonates or young children — the very groups that research shows are most affected byfluoride exposure.
For example, the researchers used data from theWisconsin Longitudinal Study, which tracked about 10,000 people in the 1957 Wisconsin high school graduating class. Participants took IQ tests in high school and cognitive tests later in life — at ages 53, 64, 72 and 80.
That means the study participants were born in about 1939 —six years before community water fluoridation begananywhere in the U.S.
Source: SGT Report
