Few subjects lead to such heated debate as the risk of stroke after chiropractic manipulations (if you think this is an exaggeration, look at the comment sections of previous posts on this subject). Almost invariably, one comes to the conclusion that more evidence would be helpful for arriving at firmer conclusions. Before this background, this new publication by researchers (mostly chiropractors) from the US ‘Dartmouth Institute for Health Policy & Clinical Practice’ is noteworthy.
The purpose of this study was to quantify the risk of stroke after chiropractic spinal manipulation, as compared to evaluation by a primary care physician, for Medicare beneficiaries aged 66 to 99 years with neck pain.
The researchers conducted a retrospective cohort analysis of a 100% sample of annualized Medicare claims data on 1 157 475 beneficiaries aged 66 to 99 years with an office visit to either a chiropractor or to a primary care physician for neck pain. They compared hazard of vertebrobasilar stroke and any stroke at 7 and 30 days after office visit using a Cox proportional hazards model. We used direct adjusted survival curves to estimate cumulative probability of stroke up to 30 days for the 2 cohorts.
The findings indicate that the proportion of subjects with a stroke of any type in the chiropractic cohort was 1.2 per 1000 at 7 days and 5.1 per 1000 at 30 days. In the primary care cohort, the proportion of subjects with a stroke of any type was 1.4 per 1000 at 7 days and 2.8 per 1000 at 30 days. In the chiropractic cohort, the adjusted risk of stroke was significantly lower at 7 days as compared to the primary care cohort (hazard ratio, 0.39; 95% confidence interval, 0.33-0.45), but at 30 days, a slight elevation in risk was observed for the chiropractic cohort (hazard ratio, 1.10; 95% confidence interval, 1.01-1.19).
The authors conclude that, among Medicare B beneficiaries aged 66 to 99 years with neck pain, incidence of vertebrobasilar stroke was extremely low. Small differences in risk between patients who saw a chiropractor and those who saw a primary care physician are probably not clinically significant.
I do, of course, applaud any new evidence on this rather ‘hot’ topic – but is it just me, or are the above conclusions a bit odd? Five strokes per 1000 patients is definitely not “extremely low” in my book; and furthermore I do wonder whether all experts would agree that a doubling of risk at 30 days in the chiropractic cohort is “probably not clinically significant” – particularly, if we consider that chiropractic spinal manipulation has so very little proven benefit.
My message to (chiropractic) researchers is simple: PLEASE REMEMBER THAT SCIENCE IS NOT A TOOL FOR CONFIRMING BUT FOR TESTING HYPOTHESES.
On 1/12/2014 I published a post in which I offered to give lectures to students of alternative medicine:
Getting good and experienced lecturers for courses is not easy. Having someone who has done more research than most working in the field and who is internationally known, might therefore be a thrill for students and an image-boosting experience of colleges. In the true Christmas spirit, I am today making the offer of being of assistance to the many struggling educational institutions of alternative medicine .
A few days ago, I tweeted about my willingness to give free lectures to homeopathic colleges (so far without response). Having thought about it a bit, I would now like to extend this offer. I would be happy to give a free lecture to the students of any educational institution of alternative medicine.
I did not think that this would create much interest – and I was right: only the ANGLO-EUROPEAN COLLEGE OF CHIROPRACTIC has so far hoisted me on my own petard and, after some discussion (see comment section of the original post) hosted me for a lecture. Several people seem keen on knowing how this went; so here is a brief report.
I was received, on 14/1/2015, with the utmost kindness by my host David Newell. We has a coffee and a chat and then it was time to start the lecture. The hall was packed with ~150 students and the same number was listening in a second lecture hall to which my talk was being transmitted.
We had agreed on the title CHIROPRACTIC: FALLACIES AND FACTS. So, after telling the audience about my professional background, I elaborated on 7 fallacies:
- Appeal to tradition
- Appeal to authority
- Appeal to popularity
- Subluxation exists
- Spinal manipulation is effective
- Spinal manipulation is safe
- Ad hominem attack
Numbers 3, 5 and 6 were dealt with in more detail than the rest. The organisers had asked me to finish by elaborating on what I perceive as the future challenges of chiropractic; so I did:
- Stop happily promoting bogus treatments
- Denounce obsolete concepts like ‘subluxation’
- Clarify differences between chiros, osteos and physios
- Start a culture of critical thinking
- Take action against charlatans in your ranks
- Stop attacking everyone who voices criticism
I ended by pointing out that the biggest challenge, in my view, was to “demonstrate with rigorous science which chiropractic treatments demonstrably generate more good than harm for which condition”.
We had agreed that my lecture would be followed by half an hour of discussion; this period turned out to be lively and had to be extended to a full hour. Most questions initially came from the tutors rather than the students, and most were polite – I had expected much more aggression.
In his email thanking me for coming to Bournemouth, David Newell wrote about the event: The general feedback from staff and students was one of relief that you possessed only one head, :-). I hope you may have felt the same about us. You came over as someone who had strong views, a fair amount of which we disagreed with, but that presented them in a calm, informative and courteous manner as we did in listening and discussing issues after your talk. I think everyone enjoyed the questions and debate and felt that some of the points you made were indeed fair critique of what the profession may need to do, to secure a more inclusive role in the health care arena.
My own impression of the day is that some of my messages were not really understood, that some of the questions, including some from the tutors, seemed like coming from a different planet, and that people were more out to teach me than to learn from my talk. One overall impression that I took home from that day is that, even in this college which prides itself of being open to scientific evidence and unimpressed by chiropractic fundamentalism, students are strangely different from other health care professionals. The most tangible aspect of this is the openly hostile attitude against drug therapies voiced during the discussion by some students.
The question I always ask myself after having invested a lot of time in preparing and delivering a lecture is: WAS IT WORTH IT? In the case of this lecture, I think the answer is YES. With 300 students present, I am fairly confident that I did manage to stimulate a tiny bit of critical thinking in a tiny percentage of them. The chiropractic profession needs this badly!
According to the ‘General Osteopathic Council’ (GOC), osteopathy is a primary care profession, focusing on the diagnosis, treatment, prevention and rehabilitation of musculoskeletal disorders, and the effects of these conditions on patients’ general health.
Using many of the diagnostic procedures applied in conventional medical assessment, osteopaths seek to restore the optimal functioning of the body, where possible without the use of drugs or surgery. Osteopathy is based on the principle that the body has the ability to heal, and osteopathic care focuses on strengthening the musculoskeletal systems to treat existing conditions and to prevent illness.
Osteopaths’ patient-centred approach to health and well-being means they consider symptoms in the context of the patient’s full medical history, as well as their lifestyle and personal circumstances. This holistic approach ensures that all treatment is tailored to the individual patient.
On a good day, such definitions make me smile; on a bad day, they make me angry. I can think of quite a few professions which would fit this definition just as well or better than osteopathy. What are we supposed to think about a profession that is not even able to provide an adequate definition of itself?
Perhaps I try a different angle: what conditions do osteopaths treat? The GOC informs us that commonly treated conditions include back and neck pain, postural problems, sporting injuries, muscle and joint deterioration, restricted mobility and occupational ill-health.
This statement seems not much better than the previous one. What on earth is ‘muscle and joint deterioration’? It is not a condition that I find in any medical dictionary or textbook. Can anyone think of a broader term than ‘occupational ill health’? This could be anything from tennis elbow to allergies or depression. Do osteopaths treat all of those?
One gets the impression that osteopaths and their GOC are deliberately vague – perhaps because this would diminish the risk of being held to account on any specific issue?
The more one looks into the subject of osteopathy, the more confused one gets. The profession goes back to Andrew Still ((August 6, 1828 – December 12, 1917) Palmer, the founder of chiropractic is said to have been one of Still’s pupils and seems to have ‘borrowed’ most of his concepts from him – even though he always denied this) who defined osteopathy as a science which consists of such exact exhaustive and verifiable knowledge of the structure and functions of the human mechanism, anatomy and physiology & psychology including the chemistry and physics of its known elements as is made discernable certain organic laws and resources within the body itself by which nature under scientific treatment peculiar to osteopathic practice apart from all ordinary methods of extraneous, artificial & medicinal stimulation and in harmonious accord with its own mechanical principles, molecular activities and metabolic processes may recover from displacements, derangements, disorganizations and consequent diseases and regain its normal equilibrium of form and function in health and strength.
This and many other of his statements seem to indicate that the art of using language for obfuscation has a long tradition in osteopathy and goes back directly to its founding father.
What makes the subject of osteopathy particularly confusing is not just the oddity that, in conventional medicine, the term means ‘disease of the bone’ (which renders any literature searches in this area a nightmare) but also the fact that, in different countries, osteopaths are entirely different professionals. In the US, osteopathy has long been fully absorbed by mainstream medicine and there is hardly any difference between MDs and ODs. In the UK, osteopaths are alternative practitioners regulated by statute but are, compared to chiropractors, of minor importance. In Germany, osteopaths are not regulated and fairly ‘low key’, while in France, they are numerous and like to see themselves as primary care physicians.
And what about the evidence base of osteopathy? Well, that’s even more confusing, in my view. Evidence for which treatment? As US osteopaths might use any therapy from drugs to surgery, it could get rather complicated. So let’s just focus on the manual treatment as used by osteopaths outside the US.
Anyone who attempts to critically evaluate the published trial evidence in this area will be struck by at least two phenomena:
- the wide range of conditions treated with osteopathic manual therapy (OMT)
- the fact that there are several groups of researchers that produce one positive result after the next.
The best example is probably the exceedingly productive research team of J. C. Licciardone from the Osteopathic Research Center, University of North Texas. Here are a few conclusions from their clinical studies:
- The large effect size for OMT in providing substantial pain reduction in patients with chronic LBP of high severity was associated with clinically important improvement in back-specific functioning. Thus, OMT may be an attractive option in such patients before proceeding to more invasive and costly treatments.
- The large effect size for short-term efficacy of OMT was driven by stable responders who did not relapse.
- Osteopathic manual treatment has medium to large treatment effects in preventing progressive back-specific dysfunction during the third trimester of pregnancy. The findings are potentially important with respect to direct health care expenditures and indirect costs of work disability during pregnancy.
- Severe somatic dysfunction was present significantly more often in patients with diabetes mellitus than in patients without diabetes mellitus. Patients with diabetes mellitus who received OMT had significant reductions in LBP severity during the 12-week period. Decreased circulating levels of TNF-α may represent a possible mechanism for OMT effects in patients with diabetes mellitus. A larger clinical trial of patients with diabetes mellitus and comorbid chronic LBP is warranted to more definitively assess the efficacy and mechanisms of action of OMT in this population.
- The OMT regimen met or exceeded the Cochrane Back Review Group criterion for a medium effect size in relieving chronic low back pain. It was safe, parsimonious, and well accepted by patients.
- Osteopathic manipulative treatment slows or halts the deterioration of back-specific functioning during the third trimester of pregnancy.
- The only consistent finding in this study was an association between type 2 diabetes mellitus and tissue changes at T11-L2 on the right side. Potential explanations for this finding include reflex viscerosomatic changes directly related to the progression of type 2 diabetes mellitus, a spurious association attributable to confounding visceral diseases, or a chance observation unrelated to type 2 diabetes mellitus. Larger prospective studies are needed to better study osteopathic palpatory findings in type 2 diabetes mellitus.
- OMT significantly reduces low back pain. The level of pain reduction is greater than expected from placebo effects alone and persists for at least three months. Additional research is warranted to elucidate mechanistically how OMT exerts its effects, to determine if OMT benefits are long lasting, and to assess the cost-effectiveness of OMT as a complementary treatment for low back pain.
Based on this brief review of the evidence origination from one of the most active research team, one could be forgiven to think that osteopathy is a panacea. But such an assumption is, of course, nonsensical; a more reasonable conclusion might be the following: osteopathy is one of the most confusing and confused subject under the already confused umbrella of alternative medicine.
- Chronic low back pain (CLBP) is a condition which affects so many people that it represents a huge burden to individual patients’ suffering as well as to society in terms of loss of work time and increased economic cost. The number of therapies that have been claimed to be effective for CLBP can hardly be counted. Two of the most common treatments are spinal manipulation and exercise.
The purpose of this systematic review was to determine the effectiveness of spinal manipulation vs prescribed exercise for patients diagnosed with CLBP. Only RCTs that compared head-to-head spinal manipulation to an exercise group were included in this review.
A search of the current literature was conducted using a keyword process in CINAHL, Cochrane Register of Controlled Trials Database, Medline, and Embase. The searches included studies available up to August 2014. Studies were included based on PICOS criteria 1) individuals with CLBP defined as lasting 12 weeks or longer; 2) spinal manipulation performed by a health care practitioner; 3) prescribed exercise for the treatment of CLBP and monitored by a health care practitioner; 4) measurable clinical outcomes for reducing pain, disability or improving function; 5) randomized controlled trials. The methodological quality of all included articles was determined using the criteria developed and used by the Physiotherapy Evidence Database (PEDro).
Only three RCTs met the inclusion criteria of this systematic review. The outcomes used in these studies included Disability Indexes, Pain Scales and function improvement scales. One RCT found spinal manipulation to be more effective than exercise, and the results of another RCT indicated the reverse. The third RCT found both interventions offering equal effects in the long term.
The author concluded that there is no conclusive evidence that clearly favours spinal manipulation or exercise as more effective in treatment of CLBP. More studies are needed to further explore which intervention is more effective.
Whenever there are uncounted treatments for a given condition, one has to ask oneself whether they are all similarly effective or equally ineffective. The present review does unfortunately not answer this question, but I fear the latter might be more true than the former.
Considering how much money we spend on treating CLBP, it is truly surprising to see that just three RCTs are available comparing two of the most commonly used treatments for this condition. Equally surprising is the fact that we simply cannot tell, on the basis of these data, which of the two therapies is more effective.
What consequences should we draw from this information. Obviously we need more high quality trials. But what should we do in the meantime?
Whenever two treatments are equally effective (or, in this case, perhaps equally ineffective?), we must consider other important criteria such as safety and cost. Regular chiropractic care (chiropractors use spinal manipulation on almost every patient, while osteopaths and physiotherapists employ it less frequently) is neither cheap nor free of serious adverse effects such as strokes; regular exercise has none of these disadvantages. In view of these undeniable facts, it is hard not to come up with anything other than the following recommendation: until new and compelling evidence becomes available, exercise ought to be preferred over spinal manipulation as a treatment of CLBP – and consequently consulting a chiropractor should not be the first choice for CLBP patients.
The very first article on a subject related to alternative medicine with a 2015 date that I came across is a case-report. I am afraid it will not delight our chiropractic friends who tend to deny that their main therapy can cause serious problems.
In this paper, US doctors tell the story of a young woman who developed headache, vomiting, diplopia, dizziness, and ataxia following a neck manipulation by her chiropractor. A computed tomography scan of the head was ordered and it revealed an infarct in the inferior half of the left cerebellar hemisphere and compression of the fourth ventricle causing moderately severe, acute obstructive hydrocephalus. Magnetic resonance angiography showed severe narrowing and low flow in the intracranial segment of the left distal vertebral artery. The patient was treated with mannitol and a ventriculostomy. Following these interventions, she made an excellent functional recovery.
The authors of the case-report draw the following conclusions: This report illustrates the potential hazards associated with neck trauma, including chiropractic manipulation. The vertebral arteries are at risk for aneurysm formation and/or dissection, which can cause acute stroke.
I can already hear the counter-arguments: this is not evidence, it’s an anecdote; the evidence from the Cassidy study shows there is no such risk!
Indeed the Cassidy study concluded that vertebral artery accident (VBA) stroke is a very rare event in the population. The increased risks of VBA stroke associated with chiropractic and primary care physician visits is likely due to patients with headache and neck pain from VBA dissection seeking care before their stroke. We found no evidence of excess risk of VBA stroke associated chiropractic care compared to primary care. That, of course, was what chiropractors longed to hear (and it is the main basis for their denial of risk) – so much so that Cassidy et al published the same results a second time (most experts feel that this is a violation of publication ethics).
But repeating arguments does not make them more true. What we should not forget is that the Cassidy study was but one of several case-control studies investigating this subject. And the totality of all such studies does not deny an association between neck manipulation and stroke.
Much more important is the fact that a re-analysis of the Cassidy data found that prior studies grossly misclassified cases of cervical dissection and mistakenly dismissed a causal association with manipulation. The authors of this new paper found a classification error of cases by Cassidy et al and they re-analysed the Cassidy data, which reported no association between spinal manipulation and cervical artery dissection (odds ratio [OR] 5 1.12, 95% CI .77-1.63). These re-calculated results reveal an odds ratio of 2.15 (95% CI.98-4.69). For patients less than 45 years of age, the OR was 6.91 (95% CI 2.59-13.74). The authors of the re-analysis conclude as follows: If our estimates of case misclassification are applicable outside the VA population, ORs for the association between SMT exposure and CAD are likely to be higher than those reported using the Rothwell/Cassidy strategy, particularly among younger populations. Future epidemiologic studies of this association should prioritize the accurate classification of cases and SMT exposure.
I think they are correct; but my conclusion of all this would be more pragmatic and much simpler: UNTIL WE HAVE CONVINCING EVIDENCE TO THE CONTRARY, WE HAVE TO ASSUME THAT CHIROPRACTIC NECK MANIPULATION CAN CAUSE A STROKE.
Few subjects make chiropractors more uneasy than a discussion of the safety of their spinal manipulations. Many chiropractors flatly deny that there are any risks at all. However, the evidence seems to tell a different story.
The purpose of a new review was to summarise the literature for cases of adverse events in infants and children treated by chiropractors or other manual therapists, identifying treatment type and if a preexisting pathology was present. English language, peer-reviewed journals and non-peer-reviewed case reports discussing adverse events (ranging from minor to serious) were systematically searched from inception of the relevant searchable bibliographic databases through March 2014. Articles not referring to infants or children were excluded.
Thirty-one articles met the selection criteria. A total of 12 articles reporting 15 serious adverse events were found. Three deaths occurred under the care of various providers (1 physical therapist, 1 unknown practitioner, and 1 craniosacral therapist) and 12 serious injuries were reported (7 chiropractors/doctors of chiropractic, 1 medical practitioner, 1 osteopath, 2 physical therapists, and 1 unknown practitioner). High-velocity, extension, and rotational spinal manipulation was reported in most cases, with 1 case involving forcibly applied craniosacral dural tension and another involving use of an adjusting instrument. Underlying preexisting pathology was identified in a majority of the cases.
The authors concluded that published cases of serious adverse events in infants and children receiving chiropractic, osteopathic, physiotherapy, or manual medical therapy are rare. The 3 deaths that have been reported were associated with various manual therapists; however, no deaths associated with chiropractic care were found in the literature to date. Because underlying preexisting pathology was associated in a majority of reported cases, performing a thorough history and examination to exclude anatomical or neurologic anomalies before applying any manual therapy may further reduce adverse events across all manual therapy professions.
This review is a valuable addition to our knowledge about the risks of spinal manipulations. My own review summarised 26 deaths after chiropractic manipulations. In several of these instances, the age of the patient had not been reported. Therefore the above conclusion (no deaths associated with chiropractic) seems a little odd.
The following text is a shortened version of the discussion of my review which, I think, addresses most of the pertinent issues.
… numerous deaths have been associated with chiropractic. Usually high-velocity, short-lever thrusts of the upper spine with rotation are implicated. They are believed to cause vertebral arterial dissection in predisposed individuals which, in turn, can lead to a chain of events including stroke and death. Many chiropractors claim that, because arterial dissection can also occur spontaneously, causality between the chiropractic intervention and arterial dissection is not proven. However, when carefully evaluating the known facts, one does arrive at the conclusion that causality is at least likely. Even if it were merely a remote possibility, the precautionary principle in healthcare would mean that neck manipulations should be considered unsafe until proven otherwise. Moreover, there is no good evidence for assuming that neck manipulation is an effective therapy for any medical condition. Thus, the risk-benefit balance for chiropractic neck manipulation fails to be positive.
Reliable estimates of the frequency of vascular accidents are prevented by the fact that underreporting is known to be substantial. In a survey of UK neurologists, for instance, under-reporting of serious complications was 100%. Those cases which are published often turn out to be incomplete. Of 40 case reports of serious adverse effects associated with spinal manipulation, nine failed to provide any information about the clinical outcome. Incomplete reporting of outcomes might therefore further increase the true number of fatalities.
This review is focussed on deaths after chiropractic, yet neck manipulations are, of course, used by other healthcare professionals as well. The reason for this focus is simple: chiropractors are more frequently associated with serious manipulation-related adverse effects than osteopaths, physiotherapists, doctors or other professionals. Of the 40 cases of serious adverse effects mentioned above, 28 can be traced back to a chiropractor and none to a osteopath. A review of complications after spinal manipulations by any type of healthcare professional included three deaths related to osteopaths, nine to medical practitioners, none to a physiotherapist, one to a naturopath and 17 to chiropractors. This article also summarised a total of 265 vascular accidents of which 142 were linked to chiropractors. Another review of complications after neck manipulations published by 1997 included 177 vascular accidents, 32 of which were fatal. The vast majority of these cases were associated with chiropractic and none with physiotherapy. The most obvious explanation for the dominance of chiropractic is that chiropractors routinely employ high-velocity, short-lever thrusts on the upper spine with a rotational element, while the other healthcare professionals use them much more sparingly.
[REFERENCES FOR THE ABOVE STATEMENTS CAN BE FOUND IN MY REVIEW]
The chiropractic profession have been reminded time and times again that their claim to be able to effectively treat paediatric conditions is bogus. Many experts have asked them to produce some compelling evidence or stop this dangerous nonsense. Yet most of them seem to remain in denial, famously documented by the British Chiropractic Association suing Simon Singh for libel after he disclosed that they happily promote bogus treatments.
Some chiropractors now say that things have changed and that chiropractors are finally getting their act together. If that is true, progress must be painfully slow – so slow, in fact, that it is hard to see it at all. There are still far too many chiropractors who carry on just as before. There are hundreds, if not thousands of articles promoting chiropractic for childhood conditions; a very basic Google search for ‘chiropractic for children’ returns more than 7 million hits many of which advertise this sort of approach. Take this website, for instance; it makes its bogus claims entirely unabashed:
Even as an infant your child may have spinal nerve stress, known as subluxations. Although subluxations may not be painful, they can pose serious threats to your child’s development. If your baby was in a difficult position in the womb, or experienced a traumatic birth they may have developed subluxations. A common condition attributed to subluxations in children is known as Blocked Atlantal Nerve Syndrome. This condition may be the primary cause of ear and upper respiratory infections, and chronic tonsillitis.
Even regular childhood activities such as tumbles taken while learning to walk and run, bike riding, and participation in sports can also cause stress on your child’s body. Emotional stress and trauma may also be a cause of subluxations. Unless they are corrected they can affect future nerve function and the development of your child’s nervous system. They can also cause problems as your child grows and develops into adulthood.
With regular chiropractic care your child may be at less risk for common childhood disease such as colds and fevers. Some children show a marked improvement in asthma symptoms with regular chiropractic care and nutritional counselling. While chiropractors do no treat disease or sickness, they can identify and remove subluxations which interfere with your child’s natural ability to heal. By removing this stress from your child’s spinal system their immune system may function more efficiently and your child may have a better defense to disease. Their overall health may improve as their natural healing power is released. Children who receive regular chiropractic care may also be able to handle emotional and physical stress better and this care may contribute to their natural development.
Your child is never too young to start chiropractic care. Well-child care starts are early as the first month of life. Doctors use a very gentle pressure to treat children (no more pressure than picking up a tomato in the grocery store) and their treatments are very soothing to your child. After their first visit it is recommended that they receive treatments every three months up to age three, and then every six to 12 month after that. You may also want to visit your chiropractor after major milestones in your child’s life such as learning to sit up, crawl, and walk. They should also be seen if they experience any falls or trauma, and if you notice any balance issues they may be experiencing. These may include head tilting and limping.
Pediatric chiropractic care has many benefits. Children as young as infants may see an improvement in their development and overall health with regular care. Doctors of chiropractic take a proactive approach to health by striving to return and maintain your body’s natural balance. If you are looking for an alternative or supplement to traditional medical care, look into chiropractic care for your entire family.
Just a few rotten apples!… the apologists would probably say. But this is clearly not true. I find it even hard to locate the non-rotten apples in this decomposing and disgusting mess. More importantly, if it were true that things were now changing, one would expect that the progressive sections of the chiropractic profession protest regularly, sharply and effectively to shame the many charlatans amongst their midst. Crucially, one would expect the chiropractic professional organisations to oust their bogus members systematically and swiftly.
The sad truth, however, is that none of this is really happening – certainly not in the US or the UK. On the contrary, organisations like THE INTERNATIONAL PEDIATRIC ASSOCIATION, books entitled CHIROPRACTIC PEDIATRICS, and periodicals like the JOURNAL OF PEDIATRIC, MATERNAL AND FAMILY CHIROPRACTIC remain popular and respected within the chiropractic profession. A few lip-services here and there, yes. But truly effective action? No!
The tolerance of quackery, I would argue, must be one of the most important hallmarks of a quack profession.
In many countries, consumers seem to be fond of consulting chiropractors – mostly for back pain, but also for other conditions. I therefore think it is might be a good and productive idea to give anyone who is tempted to see a chiropractor some simple, easy to follow advice. Here we go:
- Ask your chiropractor what he/she thinks about the chiropractic concept of subluxation. This is the chiropractors’ term (real doctors use the word too but understand something entirely different by it) for an imagined problem with your spine. Once they have diagnosed you to suffer from subluxation, they will persuade you that it needs correcting which is done by spinal manipulation which they tend to call ‘adjustments’. There are several important issues here: firstly subluxations do not exist outside the fantasy world of chiropractic; secondly chiropractors who believe in subluxation would diagnose subluxation in about 100% of the population – also in individuals who are completely healthy. My advice is to return straight back home as soon as the chiropractor admits he believes in the mystical concept of subluxation.
- Ask your chiropractor what he/she thinks of ‘maintenance care’. This is the term many chiropractors use for indefinite treatments which do little more than transfer lots of cash from your account to that of your chiropractor. There is no good evidence to show that maintenance care does, as chiropractors claim, prevent healthy individuals from falling ill. So, unless you have the irresistible urge to burn money, don’t fall for this nonsense. You should ask your chiropractor how long and frequent your treatment will be, what it will cost, and then ask yourself whether it is worth it.
- Run a mile, if the chiropractor wants to manipulate your neck (which most will do regardless of whether you have neck-pain, some even without informed consent). Neck manipulation is associated with very serious complications; they are usually caused by an injury to an artery that supplies parts of your brain. This can cause a stroke and even death. Several hundred such cases have been documented in the medical literature – but the true figure is almost certainly much larger (there is still no system in place to monitor such events).
- Run even faster, if the chiropractor wants to treat your children for common paediatric conditions. Many chiropractors believe that their manipulations are effective for a wide range of health problems that kids frequently suffer from. However, there is not a jot of evidence that these claims are true.
- Be aware that about 50% of all patients having chiropractic treatments will suffer from side effects like pain and stiffness. These symptoms usually last for 2-3 days and can be severe enough to impede your quality of life. Ask yourself whether the risk is outweighed by the benefit of chiropractic.
- Remember that there is no good evidence that chiropractors can treat any condition effectively other than lower back pain (and even for that condition the evidence is far from strong). Many chiropractors claim to be able to treat a plethora of non-spinal conditions like asthma, ear infection, gastrointestinal complaints, autism etc. etc. There is no good evidence that these claims are correct.
- Distrust the advice given by many chiropractors regarding prescribed medications, vaccinations or surgery. Chiropractic has a long history of warning their patients against all sorts of conventional treatments. Depending on the clinical situation, following such advice can cause very serious harm.
I am minded to write similar posts for all major alternative therapies (this will not make me more popular with alternative therapists, but I don’t mind all that much) – provided, of course, that my readers find this sort of article useful. So, please do give me some feedback.
“Dr” Brian Moravec is a chiropractor from the US; he has a website where he describes himself and his skills as follows: I attended Chiropractic College and I am a graduate of Palmer College of Chiropractic in Davenport Iowa. I earned a Bachelor of Science degree as well as my Doctor of Chiropractic degree from Palmer College, which is the first chiropractic college in the world and the origin of our profession. I also attend continuing education seminars designed to keep doctors current with regard to clinical chiropractic, technique and nutrition.
The key to overall health and wellness is to have a healthy nervous system and that is what I do as a chiropractor – I make sure that your spine is functioning at its best so that your nervous system functions at its best. When the nervous system is functioning at 100%, you are a healthier individual that experiences a higher quality of life and health. I know this to be true in myself, my family and my patients.
I go to great lengths to provide my patients with the best chiropractic care I can give. I work with my patients to design a treatment plan that will be effective for their particular condition and specific to their needs. We utilize manual and low force techniques (safe and effective for newborns to seniors), to correct sublaxations in the spine. Chiropractic adjustments remove nerve interference, which allows the body to perform at its best again. I also am available for consultations on nutrition and diet, dietary supplementation and how to minimize the wear and tear on your spine.
[Emphases are mine]
What he does not state is the fact that he also is a nifty e-mail writer!
To my great surprise, I received an e-mail from him which is far too good to be kept for myself. So I decided to share it with my readers; here it is in its full and unabbreviated beauty:
its interesting to see someone with your education, and is a self proclaimed “expert” on alternative medicine, promote so much misinformation with regard to chiropractic care. fortunately you look old. and soon will be gone. I always refer to the few of you anti chiropractic fools left here as “dinosaurs”. the proof is in the pudding my “friend”. chiropractic works and will continue to be here for centuries more. you and others with much much more power than you (the AMA for example) have tried to perpetuate lies and squash chiropractic. you fail, and they failed, because whatever better serves mankind will stand the test of time. you’re a dying breed edzard. thank God.
yours in health,
brian moravec d.c.
I am encouraged to see that he recognises my education but do wonder why his upbringing obviously failed so dismally teach him even a minimum of politeness, tact, or critical thinking. It is disappointing, I think, that he does not even mention what he perceives as my lies about his beloved chiropractic. So sad, I am sure it would have been fun to debate with him.
One of the problems regularly encountered when evaluating the effectiveness of chiropractic spinal manipulation is that there are numerous chiropractic spinal manipulative techniques and clinical trials rarely provide an exact means of differentiating between them. Faced with a negative studies, chiropractors might therefore argue that the result was negative because the wrong techniques were used; therefore they might insist that it does not reflect chiropractic in a wider sense. Others claim that even a substantial body of negative evidence does not apply to chiropractic as a whole because there is a multitude of techniques that have not yet been properly tested. It seems as though the chiropractic profession wants the cake and eat it.
Amongst the most commonly used is the ‘DIVERSIFIED TECHNIQUE’ (DT) which has been described as follows: Like many chiropractic and osteopathic manipulative techniques, Diversified is characterized by a high velocity low amplitude thrust. Diversified is considered the most generic chiropractic manipulative technique and is differentiated from other techniques in that its objective is to restore proper movement and alignment of spine and joint dysfunction.
Also widely used is a technique called ‘FLEXION DISTRACTION’ (FD) which involves the use of a specialized table that gently distracts or stretches the spine and which allows the chiropractor to isolate the area of disc involvement while slightly flexing the spine in a pumping rhythm.
The ‘ACTIVATOR TECHNIQUE’ (AT) seems a little less popular; it involves having the patient lie in a prone position and comparing the functional leg lengths. Often one leg will seem to be shorter than the other. The chiropractor then carries out a series of muscle tests such as having the patient move their arms in a certain position in order to activate the muscles attached to specific vertebrae. If the leg lengths are not the same, that is taken as a sign that the problem is located at that vertebra. The chiropractor treats problems found in this way moving progressively along the spine in the direction from the feet towards the head. The activator is a small handheld spring-loaded instrument which delivers a small impulse to the spine. It was found to give off no more than 0.3 J of kinetic energy in a 3-millisecond pulse. The aim is to produce enough force to move the vertebrae but not enough to cause injury.
There is limited research comparing the effectiveness of these and the many other techniques used by chiropractors, and the few studies that are available are usually less than rigorous and their findings are thus unreliable. A first step in researching this rather messy area would be to determine which techniques are most frequently employed.
The aim of this new investigation was to do just that, namely to provide insight into which treatment approaches are used most frequently by Australian chiropractors to treat spinal musculoskeletal conditions.
A questionnaire was sent online to the members of the two main Australian chiropractic associations in 2013. The participants were asked to provide information on treatment choices for specific spinal musculoskeletal conditions.
A total of 280 responses were received. DT was the first choice of treatment for most of the included conditions. DT was used significantly less in 4 conditions: cervical disc syndrome with radiculopathy and cervical central stenosis were more likely to be treated with AT. FD was used almost as much as DT in the treatment of lumbar disc syndrome with radiculopathy and lumbar central stenosis. More experienced Australian chiropractors use more AT and soft tissue therapy and less DT compared to their less experienced chiropractors. The majority of the responding chiropractors also used ancillary procedures such as soft tissue techniques and exercise prescription in the treatment of spinal musculoskeletal conditions.
The authors concluded that this survey provides information on commonly used treatment choices to the chiropractic profession. Treatment choices changed based on the region of disorder and whether neurological symptoms were present rather than with specific diagnoses. Diversified technique was the most commonly used spinal manipulative therapy, however, ancillary procedures such as soft tissue techniques and exercise prescription were also commonly utilised. This information may help direct future studies into the efficacy of chiropractic treatment for spinal musculoskeletal disorders.
I am a little less optimistic that this information will help to direct future research. Critical readers might have noticed that the above definitions of two commonly used techniques are rather vague, particularly that of DT.
Why is that so? The answer seems to be that even chiropractors are at a loss coming up with a good definition of their most-used therapeutic techniques. I looked hard for a more precise definition but the best I could find was this: Diversified is characterized by the manual delivery of a high velocity low amplitude thrust to restricted joints of the spine and the extremities. This is known as an adjustment and is performed by hand. Virtually all joints of the body can be adjusted to help restore proper range of motion and function. Initially a functional and manual assessment of each joint’s range and quality of motion will establish the location and degree of joint dysfunction. The patient will then be positioned depending on the region being adjusted when a specific, quick impulse will be delivered through the line of the joint in question. The direction, speed, depth and angles that are used are the product of years of experience, practice and a thorough understanding of spinal mechanics. Often a characteristic ‘crack’ or ‘pop’ may be heard during the process. This is perfectly normal and is nothing to worry about. It is also not a guide as to the value or effectiveness of the adjustment.
This means that the DT is not a single method but a hotchpotch of techniques; this assumption is also confirmed by the following quote: The diversified technique is a technique used by chiropractors that is composed of all other techniques. It is the most commonly used technique and primarily focuses on spinal adjustments to restore function to vertebral and spinal problems.
What does that mean for research into chiropractic spinal manipulation? It means, I think, that even if we manage to define that a study was to test the effectiveness of one named chiropractic technique, such as DT, the chiropractors doing the treatments would most likely do what they believe is required for each individual patient.
There is, of course, nothing wrong with that approach; it is used in many other area of health care as well. In such cases, we need to view the treatment as something like a ‘black box'; we test the effectiveness of the black box without attempting to define its exact contents, and we trust that the clinicians in the trial are well-trained to use the optimal mix of techniques as needed for each individual patient.
I would assume that, in most studies available to date, this is precisely what already has been implemented. It is simply not reasonable to assume that a trial the trialists regularly instructed the chiropractors not to use the optimal treatments.
What does that mean for the interpretation of the existing trial evidence? It means, I think, that we should interpret it on face value. The clinical evidence for chiropractic treatment of most conditions fails to be convincingly positive. Chiropractors often counter that such negative findings fail to take into account that chiropractors use numerous different techniques. This argument is not valid because we must assume that in each trial the optimal techniques were administered.
In other words, the chiropractic attempt to have the cake and eat it has failed.