A new study has recently come across our radar (found @ Open Parachute – thanks Ken). Whilst the paper does conclude, “fluoride exposure from municipal drinking water does not appear to be associated with increased risk for hip fracture, myocardial infarction, or osteosarcoma in Sweden,” one may wonder why a Department of Dental Medicine is operating so far outside of its normal scope of operations (although we have seen this before).
In fairness to the author(s), limitations are acknowledged:
“We lack information on potential confounders such as additional socioeconomic variables and height at diagnosis. Moreover, misclassification of exposure when we only assess fluoride exposure from drinking water, other dietary source for fluoride (food, beverages, and dental hygiene products) might account for an important part of the total fluoride load. And additionally, non-differential misclassification of exposure (i.e. individuals categorized as exposed could in fact be unexposed and vice versa). We cannot rule out that the above mentioned methodological limitations may have influenced the results.”