Medical Conspiracies: JAMA Internal Medicine Survey Results
http://www.sciencebasedmedicine.org/medical-conspiracies/#more-30699
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They found that 49% of Americans agreed with at least one conspiracy, and 18% agreed with three or more. This is in line with the level of belief in non-medical conspiracies. They did not publish, but I would be interested, in the percentage of people who said they disagreed with all of the conspiracies. Many of the respondents indicated that they did not know if a particular conspiracy were true, likely because they had not heard of it before, but were unwilling to disagree on plausibility grounds alone.
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The second part of their study is perhaps more interesting. They found a strong predictive correlation between belief in the above conspiracies and a host of medical behaviors. Conspiracy believers were more likely to use herbal supplements, use alternative medicine, and eat organic food, and less likely to vaccinate, use sunscreen, and have regular physicals.
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The medical community would be well-served if they understood the phenomenon of medical conspiracies. In fact, it can be viewed and addressed as a public health issue. Medical institutions can take such beliefs more seriously, rather than just dismissing them as fringe. Efforts to educate the public about critical thinking, scientific methodology, and how the institutions of medicine work and are regulated, might reduce the popularity of such conspiracy theories.
I also think we need to have as much transparency as possible in scientific and regulatory processes. Secrecy or even opaqueness tends to breed paranoia.
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An interesting read, especially as a follow up to the political conspiracy theory beliefs survey.