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Amongst all the implausible treatments to be found under the umbrella of ‘alternative medicine’, Reiki might be one of the worst, i. e. least plausible and outright bizarre (see for instance here, here and here). But this has never stopped enthusiasts from playing scientists and conducting some more pseudo-science.

This new study examined the immediate symptom relief from a single reiki or massage session in a hospitalized population at a rural academic medical centre. It was designed as a retrospective analysis of prospectively collected data on demographic, clinical, process, and quality of life for hospitalized patients receiving massage therapy or reiki. Hospitalized patients requesting or referred to the healing arts team received either a massage or reiki session and completed pre- and post-therapy symptom questionnaires. Differences between pre- and post-sessions in pain, nausea, fatigue, anxiety, depression, and overall well-being were recorded using an 11-point Likert scale.

Patients reported symptom relief with both reiki and massage therapy. Reiki improved fatigue and anxiety  more than massage. Pain, nausea, depression, and well being changes were not different between reiki and massage encounters. Immediate symptom relief was similar for cancer and non-cancer patients for both reiki and massage therapy and did not vary based on age, gender, length of session, and baseline symptoms.

The authors concluded that reiki and massage clinically provide similar improvements in pain, nausea, fatigue, anxiety, depression, and overall well-being while reiki improved fatigue and anxiety more than massage therapy in a heterogeneous hospitalized patient population. Controlled trials should be considered to validate the data.

Don’t I just adore this little addendum to the conclusions, “controlled trials should be considered to validate the data” ?

The thing is, there is nothing to validate here!

The outcomes are not due to the specific effects of Reiki or massage; they are almost certainly caused by:

  • the extra attention,
  • the expectation of patients,
  • the verbal or non-verbal suggestions of the therapists,
  • the regression towards the mean,
  • the natural history of the condition,
  • the concomitant therapies administered in parallel,
  • the placebo effect,
  • social desirability.

Such pseudo-research only can only serve one purpose: to mislead (some of) us into thinking that treatments such as Reiki might work.

What journal would be so utterly devoid of critical analysis to publish such unethical nonsense?

Ahh … it’s our old friend the Journal of Alternative and Complementary Medicine

Say no more!

Reiki is a Japanese technique administered by “laying on hands” and is based on the idea that an unseen “life force energy” flows through us and is what causes us to be alive. If one’s “life force energy” is low, then we are more likely to get sick or feel stress, and if it is high, we are more capable of being happy and healthy (because it is such a clear-cut case of nonsense, we have discussed Reiki regularly; see for instance here, here, here, here, here, here, and here).

But nonsense does not stop researchers from conducting trials. In this new clinical trial, conducted in Physiotherapy Clinic of Khatam Al-Anbia Hospital in Iran, 60 patients with pain due to inter-vertebral disc herniation (IVDH) were randomly assigned to one of three groups.

  1. The Reiki group received three 15-minute Reiki sessions on consecutive days by a master of Reiki plus Indomethacin and Methocarbamol (as in group 3).
  2. The physiotherapy group underwent 7 to 10 sessions of physiotherapy of 60 to 90 minutes (heat therapy, TENS, pelvic traction, and physical exercises) plus Indomethacin and Methocarbamol (as in group 3).
  3. The drug group received Indomethacin capsules 75 mg and Methocarbamol tablets 500 mg every 8 hours daily for one week.

The severity of pain and the activities of daily living (ADL) were measured using visual analogue scales (VAS) and ADL-Instrumental ADL questionnaire before and after the intervention. A significant difference was found in pain intensity and ADL improvement between Reiki and the drug therapy. No significant difference between the Reiki and physiotherapy groups were noted.

The authors concluded that Reiki and physiotherapy are effective methods in managing pain and improving ADL in patients with IVDH; however, Reiki is more cost-effective and faster treatment method than physiotherapy.

This RCT seems fairly well-panned and conducted, and its results are straight forward. My only problem with it is how the findings are interpreted.

The study design was such that there was no blinding or control for placebo effects. Therefore, the observed outcomes can be interpreted in more than one way. In my view, by far the most plausible explanation is that Reiki (being an exotic, impressive intervention that generates plenty of expectation) produced a powerful placebo effect. Physiotherapy (being entirely normal and routine), on the other hand, was only marginally successful. It is regrettable that the authors do not even consider this interpretation of their results. They should have remembered that a clinical trial test the null-hypothesis (the experimental treatment is not better that the comparator) which can be rejected only, if there is no other reasonable explanation for the results produced.

If I am correct, the conclusions should be re-written as follows:

The addition of Reiki to drug treatment generated better outcomes than drug therapy alone. Physiotherapy was only marginally effective. The effects of Reiki are most likely not due to the treatment per se but to a classical placebo response.

An article in yesterday’ Times makes the surprising claim that ‘doctors turn to herbal cures when the drugs don’t work’. As the subject is undoubtedly relevant to this blog and as the Times is a highly respected newspaper, I think this might be important and will therefore comment (in normal print) on the full text of the article (in bold print):

GPs are increasingly dissatisfied with doling out pills that do not work for illnesses with social and emotional roots, and a surprising number of them end up turning to alternative medicine.

What a sentence! I would have thought that GPs have always been ‘dissatisfied’ with treatments that are ineffective. But who says they turn to alternative medicine in ‘surprising numbers’ (our own survey does not confirm the notion)? And what is a ‘surprising number’ anyway (zero would be surprising, in my view)?

Charlotte Mendes da Costa is unusual in being both an NHS GP and a registered homeopath. Her frustration with the conventional approach of matching a medicine to a symptom is growing as doctors increasingly see the limits, and the risks, of such a tactic.

Do we get the impression that THE TIMES does not know that homeopathy is not herbal medicine? Do they know that ‘matching a medicine to a symptom’ is what homeopaths believe they are doing? Real doctors try to find the cause of a symptom and, whenever possible, treat it.

She asks patients with sore throats questions that few other GPs pose: “What side is it? Is it easier to swallow solids or liquids? What time of day is it worst?” Dr Mendes da Costa is trying to find out which homeopathic remedy to prescribe. But when NHS guidance for sore throats aims mainly to convince patients that they will get better on their own, her questions are just as important as her prescription.

This section makes no sense. Sore throats do get better on their own, that’s a fact. And empathy is not a monopoly of homeopaths. But Dr Mendes Da Costa might be somewhat detached from reality; she once promoted the nonsensical notion that “up to the end of 2010, 156 randomised controlled trials (RCTs) in homeopathy had been carried out with 41% reporting positive effects, whereas only 7% have been negative. The remainder were non-conclusive.” (see more on this particular issue here)

“It’s very difficult to disentangle the effect of listening to someone properly, in a non-judgmental way, and taking a real rather than a superficial interest,” she says. “With a sore throat [I was trained] really only to be interested in, ‘Do they need antibiotics or not?’ ”

In this case, she should ask her money back; her medical school seems to have been rubbish in training her adequately.

This week a Lancet series on back pain said that millions of patients were getting treatments that did them no good. A government review is looking into how one in 11 people has come to be on potentially addictive drugs such as tranquillisers, opioid painkillers and antidepressants.

Yes, and how is that an argument for homeopathy? It isn’t! It seems to come from the textbook of fallacies.

And this week a BMJ Open study found that GPs with alternative training prescribed a fifth fewer antibiotics.

That study was akin to showing that butchers sell less vegetables than green-grocers. It provided no argument at all for implying that homeopathy is a valuable therapy.

Doctors seem receptive to alternative approaches: in a poll on its website 70 per cent agreed that doctors should recommend acupuncture to patients in pain. The Faculty of Homeopathy now counts 400 doctors among its 700 healthcare professional members.

Wow! Does the Times journalist know that the ‘Faculty of Homeopathy’ is primarily an organisation for doctor homeopaths? If so, why are these figures anything to write home about? And does the author appreciate that the pole was open not just to doctors but to to anyone (particularly those who were motivated, like acupuncturists)?

This horrifies many academics, who say that there is almost no evidence that complementary therapies work.

It horrifies nobody, I’d say. It puzzles some people, and not just academics. And their claim of a lack of sound evidence is evidence-based.

“It’s a false battle”, says Michael Dixon, a GP who chairs the College of Medicine, which is trying to broaden the focus on treatment to patients’ whole lives. “GPs are practical. If a patient gets better that’s all that matters.”

Here comes the inevitable Dr Dixon (the ‘pyromaniac in a field of straw-men’) with the oldest chestnut in town. But repeating a nonsense endlessly does not render it sensible.

Dr Dixon says there are enormous areas of illness ranging from chronic pain to irritable bowels where few conventional treatments have been shown to be particularly effective, so why not try alternatives with fewer side effects?

Unable to diagnose and treat adequately, let’s all do the next worst thing and apply some outright quackery?!? Logic does not seem to be Dixon’s strong point, does it?

He recommends herbal remedies such as pelargonium — “like a geranium, quite a pretty little flower” — acupressure, and techniques such as self-hypnosis. To those who say these are placebos he replies: so what?

So what indeed! There are over 200 species of pelargonium; only 2 or 3 of them are used in herbal medicine. I don’t suppose Dr Dixon wants to poison us?

“Aromatherapy does work, but only if you believe in it, that’s the way you have to look at it, like a mother kissing knees better.” He continues: “We are healers. That’s what we do as doctors. You can call it theatrical or you can call it a relationship. A lot of patients come in with a metaphor — a headache is actually unhappiness — and the treatment is symbolic.”

It frightens me to know that there are doctors out there who think like this!

What if a patient is seriously ill?

A cancer is a metaphor for what exactly?

As doctors, we have the ethical duty to apply BOTH the science and the art of medicine, BOTH efficacious, evidence-based therapies AND compassion. Can I be so bold as to recommend our book about the ethics of alternative medicine to Dixon?

Such talk makes conventional doctors very nervous. Yet acupuncture illustrates their dilemma. It used to be recommended by the NHS for back pain because patients did improve. Now it is not, after further evidence suggested that patients given placebo “sham acupuncture” did just as well.

No, acupuncture used to be recommended by NICE because there was some evidence; when subsequently more rigorous trials emerged showing that it does NOT work, NICE stopped recommending it. Real medicine develops – it’s only alternative medicine and its proponents that seem to be stuck in the past and resist progress.

Martin Underwood, of the University of Warwick, asks: “So are you going to say, ‘Well, patients get better than they would do otherwise’? Or say it’s all theatrical placebo because it shows no benefit over sham treatment? That’s the question for society.”

Society has long answered it! The answer is called evidence-based medicine. We are not content using quackery for its placebo response; we know that effective treatments do that too, and we want to make progress and improve healthcare of tomorrow.

Although many doctors agree that they need to look at patients more broadly, they insist they do not need to turn to unproven treatments. The magic ingredient, they say, is not an alternative remedy, but time. Helen Stokes-Lampard, chairwoman of the Royal College of GPs, said: “Practices which offer alternative therapies tend to spend longer with patients . . . allowing for more in-depth conversations.”

I am sorry, if this post turned into a bit of a lengthy rant. But it was needed, I think: if there ever was a poorly written, ill focussed, badly researched and badly argued article on alternative medicine, it must be this one.

Did I call the Times a highly respected paper?

I take it back.

The media have (rightly) paid much attention to the three Lancet-articles on low back pain (LBP) which were published this week. LBP is such a common condition that its prevalence alone renders it an important subject for us all. One of the three papers covers the treatment and prevention of LBP. Specifically, it lists various therapies according to their effectiveness for both acute and persistent LBP. The authors of the article base their judgements mainly on published guidelines from Denmark, UK and the US; as these guidelines differ, they attempt a synthesis of the three.

Several alternative therapist organisations and individuals have consequently jumped on the LBP  bandwagon and seem to feel encouraged by the attention given to the Lancet-papers to promote their treatments. Others have claimed that my often critical verdicts of alternative therapies for LBP are out of line with this evidence and asked ‘who should we believe the international team of experts writing in one of the best medical journals, or Edzard Ernst writing on his blog?’ They are trying to create a division where none exists,

The thing is that I am broadly in agreement with the evidence presented in Lancet-paper! But I also know that things are a bit more complex.

Below, I have copied the non-pharmacological, non-operative treatments listed in the Lancet-paper together with the authors’ verdicts regarding their effectiveness for both acute and persistent LBP. I find no glaring contradictions with what I regard as the best current evidence and with my posts on the subject. But I feel compelled to point out that the Lancet-paper merely lists the effectiveness of several therapeutic options, and that the value of a treatment is not only determined by its effectiveness. Crucial further elements are a therapy’s cost and its risks, the latter of which also determines the most important criterion: the risk/benefit balance. In my version of the Lancet table, I have therefore added these three variables for non-pharmacological and non-surgical options:

Advice to stay active +, routine +, routine None Low Positive
Education +, routine +, routine None Low Positive
Superficial heat +/- Ie Very minor Low to medium Positive (aLBP)
Exercise Limited +/-, routine Very minor Low Positive (pLBP)
CBT Limited +/-, routine None Low to medium Positive (pLBP)
Spinal manipulation +/- +/- vfbmae
High Negative
Massage +/- +/- Very minor High Positive
Acupuncture +/- +/- sae High Questionable
Yoga Ie +/- Minor Medium Questionable
Mindfulness Ie +/- Minor Medium Questionable
Rehab Ie +/- Minor Medium to high Questionable

Routine = consider for routine use

+/- = second line or adjunctive treatment

Ie = insufficient evidence

Limited = limited use in selected patients

vfbmae = very frequent, minor adverse effects

sae = serious adverse effects, including deaths, are on record

aLBP = acute low back pain

The reason why my stance, as expressed on this blog and elsewhere, is often critical about certain alternative therapies is thus obvious and transparent. For none of them (except for massage) is the risk/benefit balance positive. And for spinal manipulation, it even turns out to be negative. It goes almost without saying that responsible advice must be to avoid treatments for which the benefits do not demonstrably outweigh the risks.

I imagine that chiropractors, osteopaths and acupuncturists will strongly disagree with my interpretation of the evidence (they might even feel that their cash-flow is endangered) – and I am looking forward to the discussions around their objections.

We all know that there is a plethora of interventions for and specialists in low back pain (chiropractors, osteopaths, massage therapists, physiotherapists etc., etc.); and, depending whether you are an optimist or a pessimist, each of these therapies is as good or as useless as the next. Today, a widely-publicised series of articles in the Lancet confirms that none of the current options is optimal:

Almost everyone will have low back pain at some point in their lives. It can affect anyone at any age, and it is increasing—disability due to back pain has risen by more than 50% since 1990. Low back pain is becoming more prevalent in low-income and middle-income countries (LMICs) much more rapidly than in high-income countries. The cause is not always clear, apart from in people with, for example, malignant disease, spinal malformations, or spinal injury. Treatment varies widely around the world, from bed rest, mainly in LMICs, to surgery and the use of dangerous drugs such as opioids, usually in high-income countries.

The Lancet publishes three papers on low back pain, by an international group of authors led by Prof Rachelle Buchbinder, Monash University, Melbourne, Australia, which address the issues around the disorder and call for worldwide recognition of the disability associated with the disorder and the removal of harmful practices. In the first paper, Jan Hartvigsen, Mark Hancock, and colleagues draw our attention to the complexity of the condition and the contributors to it, such as psychological, social, and biophysical factors, and especially to the problems faced by LMICs. In the second paper, Nadine Foster, Christopher Maher, and their colleagues outline recommendations for treatment and the scarcity of research into prevention of low back pain. The last paper is a call for action by Rachelle Buchbinder and her colleagues. They say that persistence of disability associated with low back pain needs to be recognised and that it cannot be separated from social and economic factors and personal and cultural beliefs about back pain.

Overview of interventions endorsed for non-specific low back pain in evidence-based clinical practice guidelines (Danish, US, and UK guidelines)

In this situation, it makes sense, I think, to opt for a treatment (amongst similarly effective/ineffective therapies) that is at least safe, cheap and readily available. This automatically rules out chiropractic, osteopathy and many others. Exercise, however, does come to mind – but what type of exercise?

The aim of this meta-analysis of randomized controlled trials was to gain insight into the effectiveness of walking intervention on pain, disability, and quality of life in patients with chronic low back pain (LBP) at post intervention and follow ups.

Six electronic databases (PubMed, Science Direct, Web of Science, Scopus, PEDro and The Cochrane library) were searched from 1980 to October 2017. Randomized controlled trials (RCTs) in patients with chronic LBP were included, if they compared the effects of walking intervention to non-pharmacological interventions. Pain, disability, and quality of life were the primary health outcomes.

Nine RCTs were suitable for meta-analysis. Data was analysed according to the duration of follow-up (short-term, < 3 months; intermediate-term, between 3 and 12 months; long-term, > 12 months). Low- to moderate-quality evidence suggests that walking intervention in patients with chronic LBP was as effective as other non-pharmacological interventions on pain and disability reduction in both short- and intermediate-term follow ups.

The authors concluded that, unless supplementary high-quality studies provide different evidence, walking, which is easy to perform and highly accessible, can be recommended in the management of chronic LBP to reduce pain and disability.

I know – this will hardly please the legions of therapists who earn their daily bread with pretending their therapy is the best for LBP. But healthcare is clearly not about the welfare of the therapists, it is/should be about patients. And patients should surely welcome this evidence. I know, walking is not always easy for people with severe LBP, but it seems effective and it is safe, free and available to everyone.

My advice to patients is therefore to walk (slowly and cautiously) to the office of their preferred therapist, have a little rest there (say hello to the staff perhaps) and then walk straight back home.

The plethora of dodgy meta-analyses in alternative medicine has been the subject of a recent post – so this one is a mere update of a regular lament.

This new meta-analysis was to evaluate evidence for the effectiveness of acupuncture in the treatment of lumbar disc herniation (LDH). (Call me pedantic, but I prefer meta-analyses that evaluate the evidence FOR AND AGAINST a therapy.) Electronic databases were searched to identify RCTs of acupuncture for LDH, and 30 RCTs involving 3503 participants were included; 29 were published in Chinese and one in English, and all trialists were Chinese.

The results showed that acupuncture had a higher total effective rate than lumbar traction, ibuprofen, diclofenac sodium and meloxicam. Acupuncture was also superior to lumbar traction and diclofenac sodium in terms of pain measured with visual analogue scales (VAS). The total effective rate in 5 trials was greater for acupuncture than for mannitol plus dexamethasone and mecobalamin, ibuprofen plus fugui gutong capsule, loxoprofen, mannitol plus dexamethasone and huoxue zhitong decoction, respectively. Two trials showed a superior effect of acupuncture in VAS scores compared with ibuprofen or mannitol plus dexamethasone, respectively.

The authors from the College of Traditional Chinese Medicine, Jinan University, Guangzhou, Guangdong, China, concluded that acupuncture showed a more favourable effect in the treatment of LDH than lumbar traction, ibuprofen, diclofenac sodium, meloxicam, mannitol plus dexamethasone and mecobalamin, fugui gutong capsule plus ibuprofen, mannitol plus dexamethasone, loxoprofen and huoxue zhitong decoction. However, further rigorously designed, large-scale RCTs are needed to confirm these findings.

Why do I call this meta-analysis ‘dodgy’? I have several reasons, 10 to be exact:

  1. There is no plausible mechanism by which acupuncture might cure LDH.
  2. The types of acupuncture used in these trials was far from uniform and  included manual acupuncture (MA) in 13 studies, electro-acupuncture (EA) in 10 studies, and warm needle acupuncture (WNA) in 7 studies. Arguably, these are different interventions that cannot be lumped together.
  3. The trials were mostly of very poor quality, as depicted in the table above. For instance, 18 studies failed to mention the methods used for randomisation. I have previously shown that some Chinese studies use the terms ‘randomisation’ and ‘RCT’ even in the absence of a control group.
  4. None of the trials made any attempt to control for placebo effects.
  5. None of the trials were conducted against sham acupuncture.
  6. Only 10 studies 10 trials reported dropouts or withdrawals.
  7. Only two trials reported adverse reactions.
  8. None of these shortcomings were critically discussed in the paper.
  9. Despite their affiliation, the authors state that they have no conflicts of interest.
  10. All trials were conducted in China, and, on this blog, we have discussed repeatedly that acupuncture trials from China never report negative results.

And why do I find the journal ‘dodgy’?

Because any journal that publishes such a paper is likely to be sub-standard. In the case of ‘Acupuncture in Medicine’, the official journal of the British Medical Acupuncture Society, I see such appalling articles published far too frequently to believe that the present paper is just a regrettable, one-off mistake. What makes this issue particularly embarrassing is, of course, the fact that the journal belongs to the BMJ group.

… but we never really thought that science publishing was about anything other than money, did we?

Today, the BMJ published our ‘head to head‘ article on the above question. Dr Mike Cummings argues the pro-part, while Prof Asbjorn Horbjardsson and I argue against the notion.

The pro arguments essentially are the well-rehearsed points acupuncture-fans like to advance:

  • Some guidelines do recommend acupuncture.
  • Sham acupuncture is not a valid comparator.
  • The largest meta-analysis shows a small effect.
  • Acupuncture is not implausible.
  • It improves quality of life.

Cummings concludes as follows: In summary, the pragmatic view sees acupuncture as a relatively safe and moderately effective intervention for a wide range of common chronic pain conditions. It has a plausible set of neurophysiological mechanisms supported by basic science.12 For those patients who choose it and who respond well, it considerably improves health related quality of life, and it has much lower long term risk for them than non-steroidal anti-inflammatory drugs. It may be especially useful for chronic musculoskeletal pain and osteoarthritis in elderly patients, who are at particularly high risk from adverse drug reactions.

Our arguments are also not new; essentially, we stress that:

  • The effects of acupuncture are too small to be clinically relevant.
  • They are probably not even caused by acupuncture, but the result of residual bias.
  • Pragmatic trials are of little value in defining efficacy.
  • Acupuncture is not free of risks.
  • Regular acupuncture treatments are expensive.
  • There is no generally accepted, plausible mechanism.

We concluded that after decades of research and hundreds of acupuncture pain trials, including thousands of patients, we still have no clear mechanism of action, insufficient evidence for clinically worthwhile benefit, and possible harms. Therefore, doctors should not recommend acupuncture for pain.

Neither Asbjorn nor I have any conflicts of interests to declare.

Dr Cummings, by contrast, states that he is the salaried medical director of the British Medical Acupuncture Society, which is a membership organisation and charity established to stimulate and promote the use and scientific understanding of acupuncture as part of the practice of medicine for the public benefit. He is an associate editor for Acupuncture in Medicine, published by BMJ. He has a modest private income from lecturing outside the UK, royalties from textbooks, and a partnership teaching veterinary surgeons in Western veterinary acupuncture. He has participated in a NICE guideline development group as an expert adviser discussing acupuncture. He has used Western medical acupuncture in clinical practice following a chance observation as a medical officer in the Royal Air Force in 1989.


Please, do let us know by posting a comment here, or directly at the BMJ article (better), or both (best).

Do chiropractors even know the difference between promotion and research?

Probably a rhetorical question.

Personally, I have seen them doing so much pseudo-research that I doubt they recognise the real thing, even if they fell over it.

Here is a recent example that stands for many, many more such ‘research’ projects (some of which have been discussed on this blog).

But first a few sentences on the background of this new ‘study’.

The UD chiropractic profession is currently on the ‘opioid over-use bandwagon’ hoping that this move might promote their trade. Most chiropractors have always been against using (any type of) pharmaceutical treatment and advise their patients accordingly. D D Palmer, the founder of chiropractic, was adamant that drugs are to be avoided; he stated for instance that Drugs are delusive; they do not adjust anything. And “as the Founder intended, chiropractic has existed as a drug-free healthcare profession for better than 120 years.” To this day, chiropractors are educated and trained to argue against non-drug treatments and regularly claim that chiropractic is a drug-free alternative to traditional medicine.

Considering this background, this new piece of (pseudo) research is baffling, in my view.

The objective of this investigation was to evaluate the association between utilization of chiropractic services and the use of prescription opioid medications. The authors used a retrospective cohort design to analyse health insurance claims data. The data source was the all payer claims database administered by the State of New Hampshire. The authors chose New Hampshire because health claims data were readily available for research, and in 2015, New Hampshire had the second-highest age-adjusted rate of drug overdose deaths in the United States.

The study population comprised New Hampshire residents aged 18-99 years, enrolled in a health plan, and with at least two clinical office visits within 90 days for a primary diagnosis of low-back pain. The authors excluded subjects with a diagnosis of cancer. They measured likelihood of opioid prescription fill among recipients of services delivered by chiropractors compared with a control group of patients not consulting a chiropractor. They also compared the cohorts with regard to rates of prescription fills for opioids and associated charges.

The adjusted likelihood of filling a prescription for an opioid analgesic was 55% lower among chiropractic compared to non-chiropractic patients. Average charges per person for opioid prescriptions were also significantly lower among the former group.

The authors concluded that among New Hampshire adults with office visits for noncancer low-back pain, the likelihood of filling a prescription for an opioid analgesic was significantly lower for recipients of services delivered by doctors of chiropractic compared with nonrecipients. The underlying cause of this correlation remains unknown, indicating the need for further investigation.

The underlying cause remains unknown???


Let me speculate, or even better, let me extrapolate by drawing an analogy:

Employees by a large Hamburger chain set out to study the association between utilization of Hamburger restaurant services and vegetarianism. The authors used a retrospective cohort design. The study population comprised New Hampshire residents aged 18-99 years, who had entered the premises of a Hamburger restaurant within 90 days for a primary purpose of eating. The authors excluded subjects with a diagnosis of cancer. They measured the likelihood of  vegetarianism among recipients of services delivered by Hamburger restaurants compared with a control group of individuals not using meat-dispensing facilities. They also compared the cohorts with regard to the money spent in Hamburger restaurants.

The adjusted likelihood of being a vegetarian was 55% lower among the experimental group compared to controls. The average money spent per person in Hamburger restaurants were also significantly lower among the Hamburger group.

The authors concluded that among New Hampshire adults visiting Hamburger restaurants, the likelihood of vegetarianism was significantly lower for consumers frequenting Hamburger restaurants compared with those who failed to frequent such places. The underlying cause of this correlation remains unknown, indicating the need for further investigation.



Cranio-sacral therapy is firstly implausible, and secondly it lacks evidence of effectiveness (see for instance here, here, here and here). Yet, some researchers are nevertheless not deterred to test it in clinical trials. While this fact alone might be seen as embarrassing, the study below is a particular and personal embarrassment to me, in fact, I am shocked by it and write these lines with considerable regret.

Why? Bear with me, I will explain later.

The purpose of this trial was to evaluate the effectiveness of osteopathic manipulative treatment and osteopathy in the cranial field in temporomandibular disorders. Forty female subjects with temporomandibular disorders lasting at least three months were included. At enrollment, subjects were randomly assigned into two groups: (1) osteopathic manipulative treatment group (n=20) and (2) osteopathy in the cranial field [craniosacral therapy for you and me] group (n=20). Examinations were performed at baseline (E0) and at the end of the last treatment (E1), and consisted of subjective pain intensity with the Visual Analog Scale, Helkimo Index and SF-36 Health Survey. Subjects had five treatments, once a week. 36 subjects completed the study.

Patients in both groups showed significant reduction in Visual Analog Scale score (osteopathic manipulative treatment group: p = 0.001; osteopathy in the cranial field group: p< 0.001), Helkimo Index (osteopathic manipulative treatment group: p = 0.02; osteopathy in the cranial field group: p = 0.003) and a significant improvement in the SF-36 Health Survey – subscale “Bodily Pain” (osteopathic manipulative treatment group: p = 0.04; osteopathy in the cranial field group: p = 0.007) after five treatments (E1). All subjects (n = 36) also showed significant improvements in the above named parameters after five treatments (E1): Visual Analog Scale score (p< 0.001), Helkimo Index (p< 0.001), SF-36 Health Survey – subscale “Bodily Pain” (p = 0.001). The differences between the two groups were not statistically significant for any of the three endpoints.

The authors concluded that both therapeutic modalities had similar clinical results. The findings of this pilot trial support the use of osteopathic manipulative treatment and osteopathy in the cranial field as an effective treatment modality in patients with temporomandibular disorders. The positive results in both treatment groups should encourage further research on osteopathic manipulative treatment and osteopathy in the cranial field and support the importance of an interdisciplinary collaboration in patients with temporomandibular disorders. Implications for rehabilitation Temporomandibular disorders are the second most prevalent musculoskeletal condition with a negative impact on physical and psychological factors. There are a variety of options to treat temporomandibular disorders. This pilot study demonstrates the reduction of pain, the improvement of temporomandibular joint dysfunction and the positive impact on quality of life after osteopathic manipulative treatment and osteopathy in the cranial field. Our findings support the use of osteopathic manipulative treatment and osteopathy in the cranial field and should encourage further research on osteopathic manipulative treatment and osteopathy in the cranial field in patients with temporomandibular disorders. Rehabilitation experts should consider osteopathic manipulative treatment and osteopathy in the cranial field as a beneficial treatment option for temporomandibular disorders.

This study has so many flaws that I don’t know where to begin. Here are some of the more obvious ones:

  • There is, as already mentioned, no rationale for this study. I can see no reason why craniosacral therapy should work for the condition. Without such a rationale, the study should never even have been conceived.
  • Technically,  this RCTs an equivalence study comparing one therapy against another. As such it needs to be much larger to generate a meaningful result and it also would require a different statistical approach.
  • The authors mislabelled their trial a ‘pilot study’. However, a pilot study “is a preliminary small-scale study that researchers conduct in order to help them decide how best to conduct a large-scale research project. Using a pilot study, a researcher can identify or refine a research question, figure out what methods are best for pursuing it, and estimate how much time and resources will be necessary to complete the larger version, among other things.” It is not normally a study suited for evaluating the effectiveness of a therapy.
  • Any trial that compares one therapy of unknown effectiveness to another of unknown effectiveness is a complete and utter nonsense. Equivalent studies can only ever make sense, if one of the two treatments is of proven effectiveness – think of it as a mathematical equation: one equation with two unknowns is unsolvable.
  • Controlled studies such as RCTs are for comparing the outcomes of two or more groups, and only between-group differences are meaningful results of such trials.
  • The ‘positive results’ which the authors mention in their conclusions are meaningless because they are based on such within-group changes and nobody can know what caused them: the natural history of the condition, regression towards the mean, placebo-effects, or other non-specific effects – take your pick.
  • The conclusions are a bonanza of nonsensical platitudes and misleading claims which do not follow from the data.

As regular readers of this blog will doubtlessly have noticed, I have seen plenty of similarly flawed pseudo-research before – so, why does this paper upset me so much? The reason is personal, I am afraid: even though I do not know any of the authors in person, I know their institution more than well. The study comes from the Department of Physical Medicine and Rehabilitation, Medical University of Vienna, Austria. I was head of this department before I left in 1993 to take up the Exeter post. And I had hoped that, even after 25 years, a bit of the spirit, attitude, knowhow, critical thinking and scientific rigor – all of which I tried so hard to implant in my Viennese department at the time – would have survived.

Perhaps I was wrong.

Rapidly rising in popularity, kratom is hailed by some as a readily available pain remedy that is safer than traditional opioids, an effective addiction withdrawal aid and a pleasurable recreational tonic. But kratom also is assailed as a dangerous and unregulated drug that can be purchased on the Internet, a habit-forming substance that authorities say can result in opioid-like abuse and death.

Last week, the Food and Drug Administration announced that the herbal supplement kratom possesses the properties of an opioid, thus escalating the government’s effort to slow usage of this alternative pain reliever. The FDA states that the number of deaths associated with kratom use has increased to a total of 44, up from a total of 36 since the FDA’s November 2017 report. In the majority of deaths that FDA attributes to kratom, subjects ingested multiple substances with known risks, including alcohol. The presence of multiple drugs makes it difficult to determine the role any one of them played.

So, what is kratom, and why might it be dangerous?

A recent review explains that the leaves of Mitragyna speciosa (commonly known as kratom), a tree endogenous to parts of Southeast Asia, have been used traditionally for their stimulant, mood-elevating, and analgesic effects. The plant’s active constituents, mitragynine and 7-hydroxymitragynine, have been shown to modulate opioid receptors, acting as partial agonists at mu-opioid receptors and competitive antagonists at kappa- and delta-opioid receptors. Both alkaloids are G protein-biased agonists of the mu-opioid receptor and therefore, may induce less respiratory depression than classical opioid agonists. The Mitragyna alkaloids also appear to exert diverse activities at other brain receptors (including adrenergic, serotonergic, and dopaminergic receptors), which may explain the complex pharmacological profile of raw kratom extracts. Kratom exposure alone has not been causally associated with human fatalities to date. However, further research is needed to clarify the complex mechanism of action of the Mitragyna alkaloids and unlock their full therapeutic potential.

Another review adds that, by the early 2000s, kratom was increasingly used in the US as a natural remedy to improve mood and quality of life and as substitutes for prescription and illicit opioids for managing pain and opioid withdrawal by people seeking abstinence from opioids. There has been no documented threat to public health that would appear to warrant emergency scheduling of the products and placement in Schedule I of the CSA carries risks of creating serious public health problems. Banning kratom, risks creating public health problems that do not presently exist.

A third review explains that there are no published human pharmacologic, pharmacokinetic, or drug interaction studies on kratom or mitragynine, making it virtually impossible to fully understand kratom‘s therapeutic potential and risks and the populations most likely to benefit or experience harm from its use. Kratom has been used to ameliorate opioid withdrawal symptoms but also induces withdrawal. Human pharmacologic, pharmacokinetic and clinical data are of low quality precluding any firm conclusions regarding safety and efficacy. Kratom does cause a host of adverse effects without clear guidance for how they should be treated. There are numerous assessments where people have been unable to stop using kratom therapy and withdrawal signs and symptoms are problematic. Kratom does not appear in normal drug screens and, when taken with other substances of abuse, may not be recognized.

A systematic review evaluated all studies on kratom use and mental health published between January 1960 and July 2017. Its findings indicate kratom‘s potential as a harm reduction tool, most notably as a substitute for opioids among people who are addicted. Kratom also enhances mood and relieves anxiety among many users. For many, kratom‘s negative mental health effects – primarily withdrawal symptoms – appear to be mild relative to those of opioids. For some users, however, withdrawal is highly uncomfortable and maintaining abstinence becomes difficult.

In Europe, as of 2011, kratom has become a controlled drug in Denmark, Latvia, Lithuania, Poland, Romania and Sweden. In the UK, since 2016, the sale, import, and export of kratom are prohibited.

On balance, my conclusion is that we urgently need more data and meanwhile should avoid this ‘herbal drug’.


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