This article and the accompanying press releases are a particularly
disturbing example of a cultural crusade masquerading as health science.
As has been documented by many commentators (e.g., (2-5)), the research
results did not show what the authors claimed and implied. Consequently,
most of the media articles about one of the most heavily reported health
science studies in recent memory were simply wrong. This is an
embarrassment for everyone who believes that health science should be
science, not just window dressing for a political agenda.
Though the study was only an opinion survey of lay people, it was
cast as the discovery of a new health hazard. The media certainly bear
the guilt for credulous coverage, and the ostensible experts who were
interviewed bear the responsibility for claiming knowledge that they
actually lack. These failures resulted in absurd statements like Illinois
McLean County Health Director Bob Keller’s: “a cigarette does not have
to be lit to release deadly toxins” (6). Perhaps partially as an
artifact of uncritically accepting the press release (7), most reports
mischaracterized the study as introducing and proving the toxicity of
third hand smoke (e.g., (8- 26)). It should be noted that the high
proportion of the letters from the public were more accurate than the
original press reports.
Furthermore, it turns out that the study did not even represent valid
survey research. The methods were those of "push polling" political
campaigns that give survey research a very bad name. Such "surveys"
attempt to persuade people about false or misleading claims by phrasing
them as questions so they are not literal lies. This survey consisted of
a series of questions about the hazards of smoking that were designed to
cause subjects to think: "Wow, I should agree that each is a problem and
that I am worried about it." By the time subjects reached the end and
were asked about "third hand smoke", most would probably have expressed
worry about anything the questions implicitly told them they should worry
about. This is not surprising, given that the "survey" was not conducted
by scientific researchers who are experts in finding out what people
really think, but by anti-smoking activists whose mission is to persuade
people about the evils of tobacco.
One example of the problems with this article a simple list of
tobacco or tobacco smoke components (such as Polonium), followed by a
negative association of its occurrence (as in the death of the Russian)
was used to illustrate its implications in first, second or third hand
smoke. This is common practice in anti-tobacco activist rhetoric, but it
is inappropriate in publications disseminating science-based knowledge.
It would be equally as misleading to use the presence of Polonium on
broccoli to imply that ingesting the same via tobacco smoke was somehow
healthy.
The reporting of this non-discovery (and its subsequent prominence in
the media response to the article (9, 13, 14, 24, 25, 27-29)), further
reinforces the public's failure to understand the difference between large
risks and trivial ones. The most basic principle of toxicology is that the
dose makes the poison, but in this case subjects were intentionally misled
to believe that barely measurable quantities of toxins have demonstrable
health effects, even if the actual hazard is trivial compared to what they
should really be worrying about (diet, exercise, driving safely, and
actual exposure to smoke).
If the authors are not aware of this principle, they should not be
working in this area. If the authors are aware of the principle, then
they are guilty of deliberately compounding existing fears, prejudices and
ignorance in both the public and uninformed journalists. More
importantly, Pediatrics should not have let this article go to press with
this misinformation in place.
The authors, in the article, press release and subsequent interviews,
argue the danger of third hand smoke, such that smokers are encouraged to
change clothing and bathe before holding their children. And yet, the
authors still encourage the smoker to breastfeed the innocent child,
rather than substitute a tobacco-free bottle of milk or formula (6). This
can only mean that, despite repeating the nonsensical mantra of “there
is no safe level of exposure”, whatever this non-safe level of exposure
is, it must be much lower than the toxicity of bottle-feeding. The
authors also suggest, not in the article but in related interviews, that
the nose is an accurate determiner of toxicity, an interesting but
outdated pre-scientific method that cynically takes advantage of the lay
population (8, 19, 24, 26).
Many educated readers already have a jaundiced view of what passes
for epidemiological research, and this article not only justifies their
attitude but serves as the epitome of sloppy science, of politics and
opinion and desire masquerading as science. We predict that a decade from
now, if books and blogs continue to claim that epidemiology is junk
science, they will still be citing this article as a perfect example.
Let us reclaim some small semblance of virtue from this study and use
it as a template or classroom example of how not to misrepresent research
in the public sphere. Let us use it as a caution against how any research
might be misinterpreted by those already possessing inadequate models of
the world, and those who only look to the news for items which buttress
their existing prejudices. If we need ever to apply the cautionary
principle, this is the place.
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http://www.pediatrics.org/cgi/content/full/123/1/e74)
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Conflict of Interest:
Potential competing interests: The authors' competing interests compete with each other. Most important, the authors are advocates of encouraging smokers to switch to low-risk sources of nicotine (see their website, TobaccoHarmReduction.org), and so have some incentive to favor exaggerations of the risks from tobacco smoke. Misplaced worry about "third hand smoke" would tend to encourage switching to non-combustion nicotine sources. However, the authors also have a strong interest in resisting attempts to turn epidemiology into a junk science, some of which relates to their tobacco harm reduction research. The authors have worked with and received support from some entities that likely benefit from the public fearing non-existant risks from tobacco smoke (including an unrestricted grant to the University of Alberta from U.S. Smokeless Tobacco Company) and by entities that would likely suffer because of it.