News Video | Policy | GPs | Hospitals | Medical | Mental Health | Welfare | Search

 


Dunedin IQ-fluoride study Sloppy Science

Media Release

Fluoride Free New Zealand
(Fluoride Action Network NZ Inc)

20th May 2014


Dunedin IQ-fluoride study Sloppy Science

Not only were there too few unfluoridated children in this study to give reliable results (99), it is likely that they were a large proportion of the 139 children who took fluoride tablets. If so, there is no ‘unfluoridated’ group. Why was this not disclosed?

But worse, the study fails to allow for a whole range of confounding factors. The most important period for IQ damage is in the womb, yet the mothers’ fluoride intake and other factors like iodine deficiency were not controlled for. Similarly, there was poor information on total fluoride intake by these infants. Had the study actually been prospective as claimed, rather than retrospective, this essential information could have been available.

The Dunedin research report begins with the conclusion it set out to “prove” - that fluoridation is harmless. The first two named ‘researchers’ are two of NZ’s leading political promoters of fluoridation. They are dentists, not developmental neurotoxicologists.

In contrast, a Harvard University meta-analysis of studies was conducted by some of the world’s leading expert researchers into developmental neurotoxicology, who have no known bias on fluoridation policy. There were 27 studies reviewed. The total number now available is 43. The Dunedin authors wrongly dismiss this as a single study.

The Harvard review rightly caused concern to decision-makers as it showed a consistent lowering of IQ associated with fluoride intake. It is clearly the reason this Dunedin study has been published – as a political posturing, just as the tobacco companies funded and published ‘research’ showing cigarette smoking did not cause lung cancer.

The Dunedin IQ-fluoride study is missing just about all the confounding factors that the authors have criticised in the studies reviewed by the Harvard team. This is outright sloppy science. Broadbent criticizes the studies reviewed by Harvard for not controlling for these factors (when in fact some of them did) and then fails to control for them when the data is readily available to him.

This is a single ‘study’ by politically driven dentists against a robust analysis of 27 studies by world-leading experts in this field, from one of the world’s foremost universities. You’d have to have a pretty low IQ to not know whose opinion carries the more credible weight.

--

Harvard:
http://www.hsph.harvard.edu/news/features/fluoride-childrens-health-grandjean-choi/

July 25, 2012 — For years health experts have been unable to agree on whether fluoride in the drinking water may be toxic to the developing human brain. Extremely high levels of fluoride are known to cause neurotoxicity in adults, and negative impacts on memory and learning have been reported in rodent studies, but little is known about the substance’s impact on children’s neurodevelopment. In a meta-analysis, researchers from Harvard School of Public Health (HSPH) and China Medical University in Shenyang for the first time combined 27 studies and found strong indications that fluoride may adversely affect cognitive development in children. Based on the findings, the authors say that this risk should not be ignored, and that more research on fluoride’s impact on the developing brain is warranted.

© Scoop Media

 
 
 
 
 
Culture Headlines | Health Headlines | Education Headlines

 

EPMU: Fourth Anniversary

Representatives of the Engineering, Printing and Manufacturing Union are proud to stand with the Pike River families to mark four years since 29 men lost their lives. More>>

ALSO:

'Kindara': Unusual Ginger Coloured Kiwi Chick Released To Taupo Creche

A cute little kiwi chick with an unusual ginger tinge to its feathers has just been released to Wairakei Golf & Sanctuary Kiwi Creche in Taupo after hatching at Rainbow Springs' Kiwi Encounter. More>>

Werewolf: The Complicatist : Bob Dylan Himself, And By Others

Bob Dylan is about to release a six CD version of the entire Basement Tapes sessions he recorded with the Band 40 years ago. To mark the occasion, I’ve rustled together some favourite cover versions of Dylan songs, and a few lesser-known tracks by the great man. More>>

ALSO:

Werewolf: Gone Girl : The Trouble With Amy

Philip Matthews: Three words to describe the David Fincher film Gone Girl: cynical, topical and ridiculous. Ridiculous isn’t a negative. More>>

ALSO:

11/11: Armistice Day Peace Vigils

On Armistice Day 2014, the second in the series of peace vigils that will take place three times each year during the World War One centenary will be held in Hokianga, Whangarei, Auckland, Tauranga, Otaki, Lower Hutt, Wellington and Takaka. More>>

ALSO:

Te Papa: Rick Ellis Appointed New Chief Executive

The Board and Chairman of the Museum of New Zealand Te Papa Tongarewa are pleased to announce the appointment of Rick Ellis as the new Chief Executive for the museum. More>>

Couture: New All Blacks Jersey Gets Team’s Seal Of Approval

More than two years in the making, adidas has today unveiled the most technologically-advanced and blackest All Blacks jersey ever, four days before the highly anticipated match against England. More>>

Get More From Scoop

 
 

LATEST HEADLINES

 
 
 
 
Health
Search Scoop  
 
 
Powered by Vodafone
NZ independent news