The comments of Dr Adamson reveal a lack of understanding of scientific methods, including epidemiology, by his assertion " . . . asked a question about intake of sports drinks and bottled water, it is likely that ‘high level activity' girls would also have consumed these to a greater extent." Such an observation is noninformative. Further, epidemiologic findings based on observed associations, even without understanding of the mechanism, can and do inform health policy. Smoking and lung cancer were found to show a strong association, and although the mechanism was not understood, the US Surgeon General informed the public about the health risks of smoking.
Wyshak G. The Aluminum Factor—Reply. Arch Pediatr Adolesc Med. 2001;155(2):203. doi:10.1001/archpedi.155.2.199
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