(Note: this is the article on chiropractic that infamously got Simon Singh sued. It is being reposted all over the web today by multiple blogs and online magazines.)

You might be surprised to know that the founder of chiropractic therapy, Daniel David Palmer, wrote that “99% of all diseases are caused by displaced vertebrae”. In the 1860s, Palmer began to develop his theory that the spine was involved in almost every illness because the spinal cord connects the brain to the rest of the body. Therefore any misalignment could cause a problem in distant parts of the body.

In fact, Palmer’s first chiropractic intervention supposedly cured a man who had been profoundly deaf for 17 years. His second treatment was equally strange, because he claimed that he treated a patient with heart trouble by correcting a displaced vertebra.

You might think that modern chiropractors restrict themselves to treating back problems, but in fact some still possess quite wacky ideas. The fundamentalists argue that they can cure anything, including helping treat children with colic, sleeping and feeding problems, frequent ear infections, asthma and prolonged crying – even though there is not a jot of evidence.

I can confidently label these assertions as utter nonsense because I have co-authored a book about alternative medicine with the world’s first professor of complementary medicine, Edzard Ernst. He learned chiropractic techniques himself and used them as a doctor. This is when he began to see the need for some critical evaluation. Among other projects, he examined the evidence from 70 trials exploring the benefits of chiropractic therapy in conditions unrelated to the back. He found no evidence to suggest that chiropractors could treat any such conditions.

But what about chiropractic in the context of treating back problems? Manipulating the spine can cure some problems, but results are mixed. To be fair, conventional approaches, such as physiotherapy, also struggle to treat back problems with any consistency. Nevertheless, conventional therapy is still preferable because of the serious dangers associated with chiropractic.

In 2001, a systematic review of five studies revealed that roughly half of all chiropractic patients experience temporary adverse effects, such as pain, numbness, stiffness, dizziness and headaches. These are relatively minor effects, but the frequency is very high, and this has to be weighed against the limited benefit offered by chiropractors.

More worryingly, the hallmark technique of the chiropractor, known as high-velocity, low-amplitude thrust, carries much more significant risks. This involves pushing joints beyond their natural range of motion by applying a short, sharp force. Although this is a safe procedure for most patients, others can suffer dislocations and fractures.

Worse still, manipulation of the neck can damage the vertebral arteries, which supply blood to the brain. So-called vertebral dissection can ultimately cut off the blood supply, which in turn can lead to a stroke and even death. Because there is usually a delay between the vertebral dissection and the blockage of blood to the brain, the link between chiropractic and strokes went unnoticed for many years. Recently, however, it has been possible to identify cases where spinal manipulation has certainly been the cause of vertebral dissection.

Laurie Mathiason was a 20-year-old Canadian waitress who visited a chiropractor 21 times between 1997 and 1998 to relieve her low-back pain. On her penultimate visit she complained of stiffness in her neck. That evening she began dropping plates at the restaurant, so she returned to the chiropractor. As the chiropractor manipulated her neck, Mathiason began to cry, her eyes started to roll, she foamed at the mouth and her body began to convulse. She was rushed to hospital, slipped into a coma and died three days later. At the inquest, the coroner declared: “Laurie died of a ruptured vertebral artery, which occurred in association with a chiropractic manipulation of the neck.”

This case is not unique. In Canada alone there have been several other women who have died after receiving chiropractic therapy, and Edzard Ernst has identified about 700 cases of serious complications among the medical literature. This should be a major concern for health officials, particularly as under-reporting will mean that the actual number of cases is much higher.

If spinal manipulation were a drug with such serious adverse effects and so little demonstrable benefit, then it would almost certainly have been taken off the market.

Hat tip to PZ Myers at Pharyngula

At least one chiropractic association has told its members to remove their wilder unproven claims from their web sites. This follows the decision of science writer Simon Singh to appeal against a conviction of libelling chiropractors by saying that their claims of being able to cure colic and other infant troubles were “bogus.” Unfortunately for Mr. Singh, he defined “bogus” in his article as meaning invalid; but the judge invoked mind-reading powers to conclude that Mr. Singh meant “deliberately fraudulent.” That’s a bogus decision, Judge.

The trouble is, who’s being scared?

From CECTIC:

Read the whole story.

Mathias Rath, vitamin-pusher, sued Ben Goldacre of Bad Science to keep Ben from writing about him. But Ben won, and the missing chapter of his book can now be published. Read it here: “Mathias Rath: steal this chapter.”

One person dies of AIDS in Africa every two minutes. That’s half as many as women dying of complications of pregnancy worldwide, one a minute. So let’s eliminate both health threats.

On the blog Denying AIDS and Other Oddities, I found an article about “What is HIV/AIDS Denialism?” and it includes a description of denialism in general:

Like other extremist groups, denialists hold an absolute certainty that they are the sole bearers of “The Truth.” For HIV/AIDS denialists, the truth is that HIV is a harmless virus that cannot possibly cause disease, and that anti-HIV medications amount to nothing more than poison, DNA terminators that can themselves cause AIDS. Second, extremist groups believe that governments are under the control of conspiring forces. In the case of HIV/AIDS denialism, the power of Big Pharma and the medical establishment have corrupted the National Institutes of Health and biomedical sciences in general. A third characteristic of extremists is a hatred for its opponents, often seen as conspiring with their enemies. HIV/AIDS denialists attack the most visible scientists; especially those who are widely exposed in the media as well as those who have publicly debunked their rhetoric. Fourth, extremists deny basic civil liberties to those whose views they see as their enemies. Ironically, denialists censor science by cherry-picking results of research while claiming to be the victims of censorship themselves, and often claiming that their rights to free expression are being systematically thwarted. Finally, denialists, as do extremists, indulge in irresponsible accusations and character assassination. As expected, denialists refer to AIDS scientists and medical specialists as Nazis, the mafia, and murderers.

Psychologist Michael Shermer is the leading authority on Holocaust denialism and he has found that Holocaust deniers’ “fallacies of reasoning are eerily similar to those of other fringe groups, such as creationists”. Remarkably, these same personality features that Shermer describes in holocaust deniers are immediately recognizable among HIV/AIDS denialists. First, denialism concentrates on opponents’ weak points without making definitive statements about their own position. In HIV/AIDS denialism, without a shred of credible evidence to the contrary, there is an incessant call for the one study that proves HIV causes AIDS while not recognizing the thousands of studies that accumulate to irrefutably show that HIV causes AIDS. Even knowing the complexity of HIV and the barriers it poses to vaccines, Peter Duesberg looked me dead in the eyes and said that failure to achieve an HIV vaccine means that an infectious agent cannot be the cause of AIDS. Second, denialists exploit errors made by AIDS scientists, implying that a few errors detected in a mass of work calls into question the entire scientific enterprise.

…There are striking similarities in rhetoric, using selected excerpts from credible documents and calling for a debate on matters for which there is universal agreement. Denialist groups of all types claim mounting controversy and the need for a debate.

A big hat tip to Orac at Respectful Insolence for starting the discussion with his article “HIV/AIDS denialist Celia Farber on the death of Christine Maggiore: It was a “radical detox” regimen, not HIV.”