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Brown SP. Plausible Mechanisms of Causation of Immediate Stroke by Cervical Spine Manipulation: A Narrative Review. Cureus 2024; 16:e56565. [PMID: 38510520 PMCID: PMC10954208 DOI: 10.7759/cureus.56565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2024] [Indexed: 03/22/2024] Open
Abstract
It has been proposed that cervical spine manipulation (CSM) can cause dissection in healthy cervical arteries, with resultant immediate stroke. However, research does not support a causal association between CSM and cervical artery dissection (CAD) in healthy cervical arteries. The objective of this study was to review the literature to identify plausible mechanisms of causation of immediate stroke by CSM. Immediate stroke is defined as a stroke occurring within seconds or minutes of CSM. Our review found plausible thromboembolic and thrombotic mechanisms of causation of immediate stroke by CSM in the literature. The common premise of these mechanisms is CAD being present before CSM, not occurring as a result of CSM. These mechanisms of causation have clinical and medicolegal implications for physicians performing CSM.
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Affiliation(s)
- Steven P Brown
- Integrative/Complementary Medicine, Brown Chiropractic & Acupuncture, PC, Gilbert, USA
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Trager RJ, Troutner AM, Pikus HJ, Daniels CJ, Dusek JA. Symptoms of Patients With Vertebral Artery Dissection Presenting to Chiropractors: A Systematic Review and Meta-Analysis. Cureus 2023; 15:e51297. [PMID: 38283533 PMCID: PMC10822691 DOI: 10.7759/cureus.51297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/28/2023] [Indexed: 01/30/2024] Open
Abstract
Early symptoms of vertebral artery dissection (VAD) may be nonspecific, including neck pain and headache. Neck pain and headache are also common reasons for patients to seek chiropractic care. We hypothesized that neck pain and/or headache would be the most prevalent symptoms among patients with undiagnosed VAD presenting to chiropractors compared to dizziness or other symptoms. We searched PubMed, Ovid, the Index to Chiropractic Literature, Google Scholar, and gray literature through September 2023 for observational studies describing patients aged ≥10 with previously undiagnosed VAD presenting to a chiropractor. Article selection, data extraction, and quality assessment were performed in duplicate. We synthesized the point prevalence of symptoms and other clinical features. We included 10 case reports describing 10 patients (mean age = 37, SD = 7, 60% female). All patients had either neck pain or headache (100%; 95% confidence interval (CI) = 100%-100%). The most prevalent individual symptoms were neck pain (90%; 95% CI = 71%-100%), headache (80%; 95% CI = 55%-100%), visual disturbance (50%; 95% CI = 19%-81%), and dizziness (40%; 95% CI = 10%-70%). The certainty of results was very low due to publication bias. While our findings suggest that neck pain and/or headache are the most prevalent symptoms among patients with undiagnosed VAD visiting a chiropractor, the small sample size and reliance on case reports preclude any definitive conclusions. Further research with larger sample sizes, control groups, and better control of confounders is required to corroborate these results. Chiropractors should be aware of VAD features and refer suspected patients for emergency care.
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Affiliation(s)
- Robert J Trager
- Chiropractic, Connor Whole Health, University Hospitals Cleveland Medical Center, Cleveland, USA
- Department of Family Medicine and Community Health, Case Western Reserve University School of Medicine, Cleveland, USA
- Department of Biostatistics and Bioinformatics Clinical Research Training Program, Duke University School of Medicine, Durham, USA
| | - Alyssa M Troutner
- Department of Clinical Education, Southern California University of Health Sciences, Whittier, USA
| | - Harold J Pikus
- Neurosurgery, Upper Valley Neurology Neurosurgery, Lebanon, USA
| | - Clinton J Daniels
- Rehabilitation Care Services, Veterans Affairs Puget Sound Health Care System, Tacoma, USA
| | - Jeffery A Dusek
- Department of Family Medicine and Community Health, Case Western Reserve University School of Medicine, Cleveland, USA
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Garrett B, Caulfield T, Musoke R, Murdoch B, Tang X, Lam JST. Demographic and psychometric predictors associated with engagement in risk-associated alternative healthcare behaviours. PLoS One 2023; 18:e0291016. [PMID: 37733748 PMCID: PMC10513319 DOI: 10.1371/journal.pone.0291016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 08/20/2023] [Indexed: 09/23/2023] Open
Abstract
This paper builds on prior work exploring the use of risk-associated alternative healthcare (RAAH) in Canada. RAAH uptake was surveyed to explore the characteristics of adult RAAH users and the value of established psychometric instruments previously used in alternative healthcare studies in predicting RAAH behaviours: the Control Beliefs Inventory (CBI), the Reward Responsiveness Behavioural Activation System (RBAS) scale, the Positive Attitudes to Science (PAS) scale, the Satisfaction with Orthodox Medicine (SOM) scale, and the brief version of the Susceptibility to Persuasion-II (StP-II-B) scale. Findings suggest RAAH is influenced by gender, age, income, education, employment, chronic illness status, and ethnicity. Engagement in some form of RAAH was common (around 40%) and the most common types of RAAH use reported were physical manipulation and herbal/nutritional supplement use. Other higher-risk AH activities (such as use of toxins and physically invasive procedures) were also reported by about 5% of respondents. The StP-II-B and PAS instruments were predictive of the likelihood of engagement in RAAH behaviours, as illustrated by higher risk tolerance, desire for novelty, positive attitude to advertising and social influence, and positive beliefs about science. The CBI, RBAS, and SOM instruments were not predictive overall. However, the CBI and SOM instruments were predictive of engagement with physical manipulative RAAH activities, while the RBAS was predictive of herbal/nutritional RAAH engagement. These findings can help inform health professionals' understanding of public health-seeking behaviours with respect to risk.
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Affiliation(s)
- Bernie Garrett
- School of Nursing, University of British Columbia, Vancouver, British Columbia, Canada
| | - Timothy Caulfield
- Health Law Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Richard Musoke
- School of Population and Public Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Blake Murdoch
- Health Law Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Xuyan Tang
- Department of Educational and Counselling Psychology, and Special Education, University of British Columbia, Vancouver, British Columbia, Canada
| | - Joyce S. T. Lam
- Pacific Parkinson’s Research Centre, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, Canada
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Gorrell LM, Brown BT, Engel R, Lystad RP. Reporting of adverse events associated with spinal manipulation in randomised clinical trials: an updated systematic review. BMJ Open 2023; 13:e067526. [PMID: 37142321 PMCID: PMC10163511 DOI: 10.1136/bmjopen-2022-067526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 04/12/2023] [Indexed: 05/06/2023] Open
Abstract
OBJECTIVES To describe if there has been a change in the reporting of adverse events associated with spinal manipulation in randomised clinical trials (RCTs) since 2016. DESIGN A systematic literature review. DATA SOURCES Databases were searched from March 2016 to May 2022: MEDLINE (Ovid), Embase, CINAHL, ICL, PEDro and Cochrane Library. The following search terms and their derivatives were adapted for each platform: spinal manipulation; chiropractic; osteopathy; physiotherapy; naprapathy; medical manipulation and clinical trial. METHODS Domains of interest (pertaining to adverse events) included: completeness and location of reporting; nomenclature and description; spinal location and practitioner delivering manipulation; methodological quality of the studies and details of the publishing journal. Frequencies and proportions of studies reporting on each of these domains were calculated. Univariable and multivariable logistic regression models were fitted to examine the effect of potential predictors on the likelihood of studies reporting on adverse events. RESULTS There were 5399 records identified by the electronic searches, of which 154 (2.9%) were included in the analysis. Of these, 94 (61.0%) reported on adverse events with only 23.4% providing an explicit description of what constituted an adverse event. Reporting of adverse events in the abstract has increased (n=29, 30.9%) while reporting in the results section has decreased (n=83, 88.3%) over the past 6 years. Spinal manipulation was delivered to 7518 participants in the included studies. No serious adverse events were reported in any of these studies. CONCLUSIONS While the current level of reporting of adverse events associated with spinal manipulation in RCTs has increased since our 2016 publication on the same topic, the level remains low and inconsistent with established standards. As such, it is imperative for authors, journal editors and administrators of clinical trial registries to ensure there is more balanced reporting of both benefits and harms in RCTs involving spinal manipulation.
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Affiliation(s)
- Lindsay M Gorrell
- Integrative Spinal Research Group, Department of Chiropractic Medicine, University Hospital Balgrist and University of Zurich, Zurich, Switzerland
| | - Benjamin T Brown
- Department of Chiropractic, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Roger Engel
- Department of Chiropractic, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, New South Wales, Australia
| | - Reidar P Lystad
- Australian Institute of Health Innovation, Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, New South Wales, Australia
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deBuhr NB, Trager RJ, Tao C. An Adult Patient With Acute Ischemic Stroke and Carotid Stenosis Presenting to a Chiropractor: A Case Report. Cureus 2023; 15:e37209. [PMID: 37159788 PMCID: PMC10163918 DOI: 10.7759/cureus.37209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2023] [Indexed: 05/11/2023] Open
Abstract
A 59-year-old male, with a recent history of acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pneumonia, presented to a chiropractor with a one-week history of numbness in the right upper and lower extremity that was triggered by neck movement, and lightheadedness/dizziness. On examination, the chiropractor noted limited, painful cervical spine range of motion, right upper extremity weakness, patellar hyperreflexia, positive Hoffman's and Trömner's signs bilaterally, nystagmus, a sluggish right pupillary light reflex, and carotid bruit. Cervical radiographs were suggestive of Klippel-Feil syndrome. The chiropractor suspected a vascular cause such as a transient ischemic attack and referred the patient to the emergency department, which the patient visited the following day. The patient was admitted, and MRI revealed multiple tiny acute to subacute cortical infarcts of the left frontal and parietal lobes while sonography demonstrated left internal carotid artery stenosis. The patient was treated with anticoagulant and antiplatelet medications and carotid endarterectomy with a positive outcome. Given the overlap between symptoms of stroke and those of the cervical spine, chiropractors should be prepared to recognize potential stroke patients and refer them for emergent medical management.
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Affiliation(s)
- Neal B deBuhr
- Chiropractic Private Practice, Thrive Chiropractic, Cedar Falls, USA
| | - Robert J Trager
- Chiropractic, Connor Whole Health, University Hospitals Cleveland Medical Center, Cleveland, USA
| | - Cliff Tao
- Radiology, Private Practice, Chiropractic Radiology, Irvine, USA
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Haavik H, Niazi IK, Amjad I, Kumari N, Rashid U, Duehr J, Navid MS, Trager RJ, Shafique M, Holt K. The Effects of Four Weeks of Chiropractic Spinal Adjustments on Blood Biomarkers in Adults with Chronic Stroke: Secondary Outcomes of a Randomized Controlled Trial. J Clin Med 2022; 11:jcm11247493. [PMID: 36556107 PMCID: PMC9786914 DOI: 10.3390/jcm11247493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/09/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Certain blood biomarkers are associated with neural protection and neural plasticity in healthy people and individuals with prior brain injury. To date, no studies have evaluated the effects chiropractic care on serum brain-derived neurotrophic factor (BDNF), insulin-like growth factor-II (IGF-II) and glial cell-derived neurotrophic factor (GDNF) in people with stroke. This manuscript reports pre-specified, exploratory, secondary outcomes from a previously completed parallel group randomized controlled trial. We evaluated differences between four weeks of chiropractic spinal adjustments combined with the usual physical therapy (chiro + PT) and sham chiropractic with physical therapy (sham + PT) on resting serum BDNF, IGF-II and GDNF in 63 adults with chronic stroke. Blood samples were assessed at baseline, four weeks (post-intervention), and eight weeks (follow-up). Data were analyzed using a linear multivariate mixed effects model. Within both groups there was a significant decrease in the mean log-concentration of BDNF and IGF-II at each follow-up, and significant increase log-concentration of GDNF at eight-weeks' follow-up. However, no significant between-group differences in any of the blood biomarkers at each time-point were found. Further research is required to explore which factors influence changes in serum BDNF, IGF-II and GDNF following chiropractic spinal adjustments and physical therapy.
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Affiliation(s)
- Heidi Haavik
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
| | - Imran Khan Niazi
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
- Faculty of Health & Environmental Sciences, Health & Rehabilitation Research Institute, AUT University, Auckland 1010, New Zealand
- Department of Health Science and Technology, Aalborg University, 9220 Aalborg, Denmark
| | - Imran Amjad
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
- Faculty of Rehabilitation and Allied Health Sciences and Department of Biomedical Engineering, Riphah International University, Islamabad 46000, Pakistan
| | - Nitika Kumari
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
- Faculty of Health & Environmental Sciences, Health & Rehabilitation Research Institute, AUT University, Auckland 1010, New Zealand
| | - Usman Rashid
- Faculty of Health & Environmental Sciences, Health & Rehabilitation Research Institute, AUT University, Auckland 1010, New Zealand
| | - Jens Duehr
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
| | - Muhammad Samran Navid
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
| | - Robert J Trager
- Connor Whole Health, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
| | - Muhammad Shafique
- Faculty of Rehabilitation and Allied Health Sciences and Department of Biomedical Engineering, Riphah International University, Islamabad 46000, Pakistan
| | - Kelly Holt
- Centre for Chiropractic Research, New Zealand College of Chiropractic, Auckland 1060, New Zealand
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Whedon JM, Petersen CL, Li Z, Schoelkopf WJ, Haldeman S, MacKenzie TA, Lurie JD. Association between cervical artery dissection and spinal manipulative therapy -a medicare claims analysis. BMC Geriatr 2022; 22:917. [PMID: 36447166 PMCID: PMC9710172 DOI: 10.1186/s12877-022-03495-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 09/29/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Cervical artery dissection and subsequent ischemic stroke is the most serious safety concern associated with cervical spinal manipulation. METHODS We evaluated the association between cervical spinal manipulation and cervical artery dissection among older Medicare beneficiaries in the United States. We employed case-control and case-crossover designs in the analysis of claims data for individuals aged 65+, continuously enrolled in Medicare Part A (covering hospitalizations) and Part B (covering outpatient encounters) for at least two consecutive years during 2007-2015. The primary exposure was cervical spinal manipulation; the secondary exposure was a clinical encounter for evaluation and management for neck pain or headache. We created a 3-level categorical variable, (1) any cervical spinal manipulation, 2) evaluation and management but no cervical spinal manipulation and (3) neither cervical spinal manipulation nor evaluation and management. The primary outcomes were occurrence of cervical artery dissection, either (1) vertebral artery dissection or (2) carotid artery dissection. The cases had a new primary diagnosis on at least one inpatient hospital claim or primary/secondary diagnosis for outpatient claims on at least two separate days. Cases were compared to 3 different control groups: (1) matched population controls having at least one claim in the same year as the case; (2) ischemic stroke controls without cervical artery dissection; and (3) case-crossover analysis comparing cases to themselves in the time period 6-7 months prior to their cervical artery dissection. We made each comparison across three different time frames: up to (1) 7 days; (2) 14 days; and (3) 30 days prior to index event. RESULTS The odds of cervical spinal manipulation versus evaluation and management did not significantly differ between vertebral artery dissection cases and any of the control groups at any of the timepoints (ORs 0.84 to 1.88; p > 0.05). Results for carotid artery dissection cases were similar. CONCLUSION Among Medicare beneficiaries aged 65 and older who received cervical spinal manipulation, the risk of cervical artery dissection is no greater than that among control groups.
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Affiliation(s)
- James M Whedon
- Health Services Research, Southern California University of Health Sciences, 16200 Amber Valley Drive, 90604, Whittier, CA, USA.
| | - Curtis L Petersen
- The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, NH, USA
| | - Zhongze Li
- The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, NH, USA
| | | | - Scott Haldeman
- Department of Neurology, University of California at Irvine, Irvine, CA, USA
| | - Todd A MacKenzie
- The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, NH, USA
| | - Jon D Lurie
- The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth College, Hanover, NH, USA
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Maiers M, Salsbury SA. "Like Peanut Butter and Jelly": A Qualitative Study of Chiropractic Care and Home Exercise Among Older Adults With Spinal Disability. Arthritis Care Res (Hoboken) 2022; 74:1933-1941. [PMID: 33973398 DOI: 10.1002/acr.24636] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 03/17/2021] [Accepted: 04/22/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVE A mixed-methods, randomized controlled trial comparing short- and long-term chiropractic care and exercise therapy for spinal disability in older adults found no between-group differences in the primary outcome. However, those who received long-term management reported greater improvement in neck pain, self-efficacy, function, and balance. This nested qualitative study explored participants' perceptions of the benefits and drawbacks of chiropractic care and exercise for spine-related outcomes, with an emphasis on understanding what makes treatment for spine-related problems worthwhile. METHODS Of 171 individual interviews conducted after completing study treatment, 50 participants (25 per treatment group) were randomly selected for this analysis. Qualitative descriptive analysis included dual coding of verbatim transcripts by 2 investigators (MM and SAS), which was further distilled into a consensus-derived codebook of themes and organized using NVIVO software. RESULTS Participants described trial interventions as complementary to one another for spine-related disability. Chiropractic care was viewed as improving spinal pain and controlling symptoms, while exercise therapy was noted for its long-term impact on self-efficacy and self-management. These older adults considered changes in pain, global sense of improvement, and improved biomechanical function as making treatment worthwhile. CONCLUSION Older adults valued nonpharmacologic treatment options that aided them in controlling spine-related symptoms, while empowering them to maintain clinical benefit gained after a course of chiropractic spinal manipulation and exercise. The complementary nature of provider-delivered and active care modalities may be an important consideration when developing care plans. This study underscores the importance of understanding participants' values and experiences when interpreting study results and applying them to practice.
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Affiliation(s)
- Michele Maiers
- Northwestern Health Sciences University, Bloomington, Minnesota
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Russell BS, Keller M, Wynd SE, Hosek RS, Owens EF, Hoiriis KT. Angular Kinematics of Chiropractic Supine Cervical Spine Manipulation: Rotational Measures and Comparisons to Doctor and Recipient Perceptions. J Manipulative Physiol Ther 2022; 45:497-507. [PMID: 36922054 DOI: 10.1016/j.jmpt.2022.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 10/20/2022] [Accepted: 12/01/2022] [Indexed: 03/17/2023]
Abstract
OBJECTIVES The primary purposes of this study were to measure axial rotation during supine cervical spinal manipulative therapy (cSMT) and to record recipients' and doctors' perceptions of rotational magnitudes. METHODS Experienced doctors of chiropractic (DCs) provided supine cSMT and acted as recipients of cSMT. Participants who received SMT wore inertial measurement units attached to the forehead and sternum for motion capture. Afterward, recipients and DCs completed questionnaires asking about their perceptions of motion. Data were analyzed for magnitudes of axial rotation at peak thrust and correlations with patient and doctor perceptions. Secondary analyses included angular velocity, angular acceleration, and other kinematic variables. RESULTS We recorded 23 SMT events with 14 DCs. Rotation at thrust peaks averaged 32.4° (17.4°). Doctors' and recipients' perceptions of rotation were higher than measured values 45% and 50% of the time, respectively. Maximum angular velocity and acceleration averaged 221.9°/s (124.9) and 4786.5°/s2 (2456.6), respectively. We found no correlation between perceptions and velocity or acceleration; doctors' perceptions had an inverse correlation with measurements. CONCLUSION On average, we found rotation during supine cSMT to be 32°. Both DCs and SMT recipients overestimated rotation compared with actual measurements. These factors should be considered in discussions of rotation and SMT.
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Affiliation(s)
- Brent S Russell
- Life University Center for Chiropractic Research, Atlanta, Georgia.
| | - Mackenzie Keller
- Life University Center for Chiropractic Research, Atlanta, Georgia
| | - Shari E Wynd
- Department of Foundational Sciences, Texas Chiropractic College, Pasadena, Texas
| | - Ronald S Hosek
- Life University Center for Chiropractic Research, Atlanta, Georgia
| | - Edward F Owens
- Life University Center for Chiropractic Research, Atlanta, Georgia
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Zhang S, Cao Y, Ren R, Qi J, Chen Y, Li Y. Effects of Cervical Rotatory Manipulation on Hemodynamics and Plaque Stability of Atherosclerotic Internal Carotid Artery in Rabbits. J Manipulative Physiol Ther 2022; 45:261-272. [PMID: 35907659 DOI: 10.1016/j.jmpt.2022.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 10/16/2022]
Abstract
OBJECTIVE The purpose of this study was to investigate the effects of cervical rotatory manipulation (CRM) on hemodynamics and plaque stability of atherosclerotic internal carotid artery (ICA) in rabbits. METHODS Forty rabbits were randomly divided into 4 groups: (1) internal carotid atherosclerosis (ICAS) rabbits treated with CRM (ICAS-CRM group); (2) ICAS rabbits treated without CRM (ICAS group), (3) Normal-CRM group (normal rabbits treated with CRM), and (4) blank control group. In the ICAS-CRM group and ICAS group, the ICAS model was induced by ICA balloon injury combined with a high-fat diet for 12 weeks. CRM was applied to rabbits in the ICAS-CRM and the Normal-CRM groups. During the study, an ultrasonography examination was performed for detecting plaque and hemodynamics on the ICAs. At the end of the study, all atherosclerotic ICAs were removed for histological and immunohistochemical detection. RESULTS The hemodynamics (especially end-diastolic velocity, resistance index, and pulsatility index) through the ICAs were adversely affected by atherosclerosis while not adversely affected by CRM. Compared with the ICAS group, the micro-vessel density and average integrated optical densities of macrophages in the ICAS-CRM group were significantly increased. Compared to the ICAS group, in the ICAS-CRM group, the atherosclerosis was more serious, and the tunica intima was more unstable. CONCLUSIONS Although CRM did not affect the hemodynamic index of ICA, it was observed to decrease the stability of severe ICAS plaques in rabbits, which may increase the plaque vulnerability.
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Affiliation(s)
- Shaoqun Zhang
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China, Shenzhen, Guangdong, China
| | - Yafei Cao
- Shenzhen Traditional Chinese Medicine Hospital, Shenzhen, China, Shenzhen, Guangdong, China
| | - Ruxia Ren
- The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Ji Qi
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yili Chen
- Wang Jing Hospital of China Academy of Chinese Medical Sciences, Beijing, China
| | - Yikai Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.
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11
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Trager RJ, Troutner AM. Letter: Traumatic and Spontaneous Vertebral Artery Dissections: An Analysis of a Tertiary-Center 310 Patient Cohort. Oper Neurosurg (Hagerstown) 2022; 22:e233-e234. [PMID: 35315810 DOI: 10.1227/ons.0000000000000160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 12/16/2021] [Indexed: 11/19/2022] Open
Affiliation(s)
- Robert J Trager
- Connor Whole Health, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Alyssa M Troutner
- VA Finger Lakes Healthcare System, Rochester Calkins VA Clinic, Rochester, New York, USA
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12
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Prasad N, Mitra A, Shlobin NA, Azad HA, Cloney MB, Hopkins BS, Jahromi BS, Potts MB, Dahdaleh NS. Traumatic and Spontaneous Vertebral Artery Dissections: An Analysis of Tertiary-Center 310 Patient Cohort. Oper Neurosurg (Hagerstown) 2021; 21:343-350. [PMID: 34392360 DOI: 10.1093/ons/opab277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 06/06/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Vertebral artery dissections (VADs) are rare yet potentially devastating events. While the etiology of these events is either traumatic or spontaneous, there is a paucity of quantitative literature comparing the two. OBJECTIVE To identify differences in predisposing factors, event characteristics, and clinical outcomes between traumatic VADs (tVADs) and spontaneous VADs (sVADs). METHODS We retrospectively identified patients with VADs presenting to our institution at VAD onset with at least a 3-mo follow-up. Demographics, event characteristics, treatment details, and neurological outcomes as modified Rankin scale (mRS) scores were collected. RESULTS Of the 310 patients sustaining 366 VADs total, 187 (60.3%) patients experienced a total of 221 (60.4%) sVADs and 123 (39.7%) patients experienced a total of 145 (39.6%) tVADs. sVADs were more likely to occur in the intracranial course of the artery (P = .042) and have a lower mRS at discharge, 3-month, and last clinical follow-up (P = 003, .002, and .001, respectively). tVADs were more likely associated with concomitant fractures (P < .001). CONCLUSION Despite similar patient populations, tVADs are associated with higher mRS scores at all time points. Although further study is needed, this may suggest other concomitant trauma rather than the VAD itself is contributing to worse neurological status in patients with tVADs.
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Affiliation(s)
- Nikil Prasad
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Akash Mitra
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Nathan A Shlobin
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Hooman A Azad
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Michael B Cloney
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Benjamin S Hopkins
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Babak S Jahromi
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Matthew B Potts
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
- Department of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Nader S Dahdaleh
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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Pikus HJ, Harbaugh RE. Commentary on: Chiropractic associated vertebral artery dissection: An analysis of 34 patients amongst a cohort of 310. Clin Neurol Neurosurg 2021; 207:106790. [PMID: 34245988 DOI: 10.1016/j.clineuro.2021.106790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 06/19/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Harold J Pikus
- Upper Valley Neurology Neurosurgery, 106 Hanover Street, Lebanon, NH 03766, USA.
| | - Robert E Harbaugh
- Distinguished Department of Neurosurgery, Department of Engineering Science & Mechanics Penn State University, Milton S. Hershey Medical Center, 30 Hope Drive, Hershey, PA 17033, USA.
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Mitra A, Azad HA, Prasad N, Shlobin NA, Cloney MB, Hopkins BS, Jahromi BS, Potts MB, Dahdaleh NS. Chiropractic associated vertebral artery dissection: An analysis of 34 patients amongst a cohort of 310. Clin Neurol Neurosurg 2021; 206:106665. [PMID: 34020327 DOI: 10.1016/j.clineuro.2021.106665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Accepted: 04/18/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND Vertebral artery dissections (VAD) are a rare but important cause of ischemic stroke, especially in younger patients. Many etiologies have been identified, including MVAs, cervical fractures, falls, physical exercise, and cervical chiropractic manipulation. The goal of this study was to investigate the subgroup of patients who suffered a chiropractor-associated injury and determine how their prognosis compared to other-cause VAD. METHODS We conducted a retrospective chart review of 310 patients with vertebral artery dissections who presented at our institution between January 2004 and December 2018. Variables included demographic data, event characteristics, treatment, radiographic outcomes, and clinical outcomes measured using the modified Rankin Scale. FINDINGS Overall, 34 out of our 310 patients suffered a chiropractor-associated injury. These patients tended to be younger (p = 0.01), female (p = 0.003), and have fewer comorbidities (p = 0.005) compared to patients with other-cause VADs. The characteristics of the injuries were similar, but chiropractor-associated injuries appeared to be milder at discharge and at follow-up. A higher proportion of the chiropractor-associated group had injuries in the 0-2 mRS range at discharge and at 3 months (p = 0.05, p = 0.04) and no patients suffered severe long-term neurologic consequences or death (0% vs. 9.8%, p = 0.05). However, when a multivariate binomial regression was performed, these effects dissipated and the only independent predictor of a worse injury at discharge was the presence of a cervical spine fracture (p < 0.001). INTERPRETATION Chiropractor-associated injuries are similar to VADs of other causes, and apparent differences in the severity of the injury are likely due to demographic differences between the two populations.
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Affiliation(s)
- Akash Mitra
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Hooman A Azad
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Nikil Prasad
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Nathan A Shlobin
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Michael B Cloney
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Benjamin S Hopkins
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Babak S Jahromi
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Departments of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Matthew B Potts
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA; Departments of Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Nader S Dahdaleh
- Departments of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA.
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Rist PM, Bernstein C, Kowalski M, Osypiuk K, Connor JP, Vining R, Long CR, Macklin EA, Wayne PM. Multimodal chiropractic care for migraine: A pilot randomized controlled trial. Cephalalgia 2021; 41:318-328. [PMID: 33050719 PMCID: PMC9670157 DOI: 10.1177/0333102420963844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Spinal manipulation may reduce migraine frequency, but effects of multimodal chiropractic care on migraine frequency have not been evaluated. METHODS We conducted a pilot randomized controlled trial comparing multimodal chiropractic care + enhanced usual care (MCC+) versus enhanced usual care alone (EUC) among adult women with episodic migraine. EUC was comprised of usual medical care and migraine education literature. MCC+ participants received 10 sessions of chiropractic care over 14 weeks. Primary aims evaluated feasibility of recruitment, retention, protocol adherence, and safety. Change in migraine days was a secondary aim. RESULTS Of 422 patients screened, 61 were randomized over 20 months. Fifty-seven (93%) completed daily migraine logs during the intervention, 51 (84%) completed final follow-up, and 45 (74%) completed all assessments. Twenty-four of 29 MCC+ participants (83%) attended > 75% of the chiropractic sessions. Ninety-eight non-serious adverse events were reported by 26 participants (43%) with 39 events among 11 EUC participants and 59 events among 15 MCC+ participants. MCC+ participants experienced greater reductions in migraine days (-2.9 days for MCC+ vs. -1.0 days for EUC, difference = -1.9; 95% confidence interval: -3.5, -0.4). CONCLUSIONS Pre-specified feasibility criteria were not met, but deficits were remediable. Preliminary data support a definitive trial of MCC+ for migraine. TRIAL REGISTRATION This study is registered at Clinicaltrials.gov (NCT03177616).
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Affiliation(s)
- Pamela M. Rist
- Division of Preventive Medicine, Department of Medicine, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
| | - Carolyn Bernstein
- John Graham Headache Center, Department of Neurology, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
- Osher Clinical Center, Brigham and Women’s Hospital, Boston, MA
| | | | - Kamila Osypiuk
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
| | - Julie P. Connor
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
| | | | | | - Eric A. Macklin
- Biostatistics Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Peter M. Wayne
- Division of Preventive Medicine, Department of Medicine, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women’s Hospital, Boston, MA
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Harper B, Miner D, Vaughan H. Proposing a new algorithm for premanipulative testing in physical therapy practice. J Phys Ther Sci 2020; 32:775-783. [PMID: 33281296 PMCID: PMC7708008 DOI: 10.1589/jpts.32.775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/04/2020] [Indexed: 11/24/2022] Open
Abstract
In the field of physical therapy, there is debate as to the clinical utility of
premanipulative vascular assessments. Cervical artery dysfunction (CAD) risk assessment
involves a multi-system approach to differentiate between spontaneous versus mechanical
events. The purposes of this inductive analysis of the literature are to discuss the link
between cervical spine manipulation (CSM) and CAD, to examine the literature on
premanipulative vascular tests, and to suggest an optimal sequence of premanipulative
testing based on the differentiation of a spontaneous versus mechanical vascular event.
Knowing what premanipulative vascular tests assess and the associated clinical application
facilitates an evidence-informed decision for clinical application of vascular assessment
before CSM.
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Affiliation(s)
- Brent Harper
- Crean College of Health and Behavior Sciences, Chapman University: 9401 Jeronimo Road, Irvine, CA 92618, USA
| | - Daniel Miner
- Department of Physical Therapy, Waldron College of Health and Human Services, Radford University, USA
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17
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Leach RA. Full-Coverage Chiropractic in Medicare: A Proposal to Eliminate Inequities, Improve Outcomes, and Reduce Health Disparities Without Increasing Overall Program Costs. JOURNAL OF CHIROPRACTIC HUMANITIES 2020; 27:29-36. [PMID: 33324134 PMCID: PMC7729103 DOI: 10.1016/j.echu.2020.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 09/13/2020] [Accepted: 10/08/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVE The purpose of this article is to discuss evidence that supports the resolution of inequities for Medicare beneficiaries who receive chiropractic care. DISCUSSION Medicare covers necessary examinations, imaging, exercise instruction, and treatments for beneficiaries with back pain when provided by medical doctors, osteopaths, and their associated support staff such as nurse practitioners, physician assistants, clinical nurse specialists, and physical therapists. However, if the same patient with back pain presents to a chiropractor, then the only service that is covered by Medicare is manipulation of the spine. Current evidence does not support this inequity in Medicare beneficiary service coverage. There is no evidence to show an increase in serious risks associated with chiropractic treatment of neck or back pain in Medicare beneficiaries. Chiropractors support national public health goals and endorse safe, evidence-based practices. Chiropractic care for Medicare beneficiaries has been associated with enhanced clinical outcomes such as faster recovery, fewer back surgeries a year later, reduced opioid-associated disability, fewer traumatic injuries and falls, and slower declines in activities of daily living and disability over time. Further evidence points to lower costs, fewer medical physician visits for low back pain, less opioid-related expense, and less back-surgery expense with chiropractic utilization. Use is lower among vulnerable populations: seniors, lower income women, and black and Hispanic beneficiaries who may be most affected by current inequities associated with the limited coverage. In this era of evidence-based and patient-centered care, beneficiaries who receive chiropractic care are very satisfied with the care they receive. CONCLUSION The current evidence suggests a need for change in US policy toward chiropractic in Medicare and support for HR 3654. Ending inequities by providing patients full coverage for chiropractic services has the potential to enhance care outcomes and reduce health disparities without increasing program costs.
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Affiliation(s)
- Robert A. Leach
- Corresponding author: Robert A. Leach, DC, MS, Food Science, Nutrition and Health Promotion, Mississippi State University, 214 Russell Street, Starkville, MS 39759
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18
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Hawk C, Whalen W, Farabaugh RJ, Daniels CJ, Minkalis AL, Taylor DN, Anderson D, Anderson K, Crivelli LS, Cark M, Barlow E, Paris D, Sarnat R, Weeks J. Best Practices for Chiropractic Management of Patients with Chronic Musculoskeletal Pain: A Clinical Practice Guideline. J Altern Complement Med 2020; 26:884-901. [PMID: 32749874 PMCID: PMC7578188 DOI: 10.1089/acm.2020.0181] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Objective: To develop an evidence-based clinical practice guideline (CPG) through a broad-based consensus process on best practices for chiropractic management of patients with chronic musculoskeletal (MSK) pain. Design: CPG based on evidence-based recommendations of a panel of experts in chronic MSK pain management. Methods: Using systematic reviews identified in an initial literature search, a steering committee of experts in research and management of patients with chronic MSK pain drafted a set of recommendations. Additional supportive literature was identified to supplement gaps in the evidence base. A multidisciplinary panel of experienced practitioners and educators rated the recommendations through a formal Delphi consensus process using the RAND Corporation/University of California, Los Angeles, methodology. Results: The Delphi process was conducted January-February 2020. The 62-member Delphi panel reached consensus on chiropractic management of five common chronic MSK pain conditions: low-back pain (LBP), neck pain, tension headache, osteoarthritis (knee and hip), and fibromyalgia. Recommendations were made for nonpharmacological treatments, including acupuncture, spinal manipulation/mobilization, and other manual therapy; modalities such as low-level laser and interferential current; exercise, including yoga; mind-body interventions, including mindfulness meditation and cognitive behavior therapy; and lifestyle modifications such as diet and tobacco cessation. Recommendations covered many aspects of the clinical encounter, from informed consent through diagnosis, assessment, treatment planning and implementation, and concurrent management and referral. Appropriate referral and comanagement were emphasized. Conclusions: These evidence-based recommendations for a variety of conservative treatment approaches to the management of common chronic MSK pain conditions may advance consistency of care, foster collaboration between provider groups, and thereby improve patient outcomes.
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Affiliation(s)
- Cheryl Hawk
- Texas Chiropractic College, Pasadena, TX, USA
| | | | | | | | | | | | | | | | | | | | | | - David Paris
- VA Northern CA Health Care System, Redding, CA, USA
| | - Richard Sarnat
- Advanced Medicine Integration Group, L.P., Columbus, OH, USA
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19
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Hinkeldey N, Okamoto C, Khan J. Spinal Manipulation and Select Manual Therapies: Current Perspectives. Phys Med Rehabil Clin N Am 2020; 31:593-608. [PMID: 32981581 DOI: 10.1016/j.pmr.2020.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Touch is fundamental to the doctor-patient relationship. Touch can produce neuromodulatory effects that mitigate pain and put patients at ease. Touch begins with a confident handshake and continues throughout the physical examination. Touching patients where they hurt is a clear indication that a provider understands their complaint. Touch often continues as a function of treatment. This article updates evidence surrounding human touch and addresses mechanisms of action for manual therapy, the impact of manual therapy on pain management, health care conditions for which manual therapy may be beneficial, treatment plans with dose-response evidence, and the impact of manual therapy on the health care system.
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Affiliation(s)
- Nathan Hinkeldey
- VA Central Iowa Health Care System, 3600 30th Street, Des Moines, IA 50310, USA; Palmer College of Chiropractic, 1000 Brady Street, Davenport, IA 52803, USA.
| | - Casey Okamoto
- Minneapolis VA Health Care System, 1 Veterans Drive, Minneapolis, MN 55417, USA; Department of Rehabilitation Medicine, 500 Boynton Health Service Bridge, Minneapolis, MN 55455, USA
| | - Jamal Khan
- Minneapolis VA Health Care System, 1 Veterans Drive, Minneapolis, MN 55417, USA; Department of Rehabilitation Medicine, 500 Boynton Health Service Bridge, Minneapolis, MN 55455, USA
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20
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Zhang S, Qi J, Zhang L, Chen Y, Li Y. Effects of Cervical Rotation Angle on Atherosclerotic Internal Carotid Artery Blood Flow: A Safety Study Using an Animal Model of Internal Carotid Atherosclerosis. J Manipulative Physiol Ther 2020; 43:521-530. [PMID: 32893020 DOI: 10.1016/j.jmpt.2018.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 12/03/2018] [Accepted: 12/19/2018] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effects of the cervical rotation angle (CRA) on atherosclerotic internal carotid artery blood flow (ICA-BF) in an animal model. METHODS Thirty healthy New Zealand white rabbits were included in the study. Twenty of the 30 rabbits were chosen randomly to be the model rabbits, and the remaining 10 were chosen to be the normal rabbits. The model rabbits' left ICAs were treated by atherosclerosis modeling. The left ICAs of the model rabbits with atherosclerotic stenosis were chosen as the experimental group, and the right ICAs of the model rabbits without atherosclerotic stenosis were chosen as the control group. The left ICAs of the normal rabbits were chosen as the blank group. Using color duplex ultrasound, ICA-BF was measured in the artery contralateral to the direction of rotation in the positions of neutral (Pre-0°), 15°, 30°, 45°, 60°, 75°, 90°, and subsequent neutral (Post-0°). RESULTS Statistically significant decreases were seen in ICA-BF after cervical spine rotation (from Pre-0° to 90°) in the control group only (P < .05). All the values of end-diastolic velocity in the experimental group were lower than those in the blank group at the same CRAs. The resistance index and pulsatility index of the experimental group were higher than those of the blank group except at 45° rotation. CONCLUSION In our animal model, in the rabbits with hyperlipidemia but without atherosclerotic stenosis, CRA had the greatest impact on ICA-BF. Furthermore, at some of the same CRAs (especially neutral, 30°, and 60°), there were statistical differences in ICA-BF among the 3 groups.
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Affiliation(s)
- Shaoqun Zhang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Ji Qi
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Lei Zhang
- Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Guangzhou, Guangdong, China
| | - Yili Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yikai Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.
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21
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Lee TL, Sherman KJ, Hawkes RJ, Phelan EA, Turner JA. The Benefits of T'ai Chi for Older Adults with Chronic Back Pain: A Qualitative Study. J Altern Complement Med 2020; 26:456-462. [PMID: 32379976 DOI: 10.1089/acm.2019.0455] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Objective: To determine the perceived benefits of t'ai chi in older adults with chronic low-back pain (cLBP). Design: A qualitative analysis from a randomized controlled feasibility trial. Subjects: Eighteen participants (65+ years old) with cLBP of at least moderate intensity. Intervention: A 36-week intervention beginning with twice weekly classes for 12 weeks, weekly classes for 6 weeks, biweekly classes for 6 weeks, and monthly classes for 12 weeks. Participants were asked to practice at home on nonclass days and videos were provided to assist in that process. Outcome Measures: Participants in the focus groups were asked to provide feedback on their experiences with the study as well as the benefits of their t'ai chi practice. We used demographic and class attendance data to describe the sample. Results: Regarding the benefits of t'ai chi practice, five major themes were identified: functional benefits, pain reduction/pain relief, psychospiritual benefits, the importance of social support in learning t'ai chi, and the integration of t'ai chi into daily activities. The most common functional benefits were improvements in balance, flexibility, leg strength, and posture. Some reported pain reduction or pain relief, but others did not. Increased relaxation, mindfulness, and a sense of connectedness were subthemes that emerged from psychospiritual benefits. Social support benefits included motivation to attend class and group support while learning a new skill. Finally, improved body awareness allowed participants to integrate t'ai chi skills into their daily activities. Conclusions: This qualitative analysis demonstrates the multifaceted benefits of t'ai chi for older adults living with cLBP.
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Affiliation(s)
- Tamsin L Lee
- Department of Child, Family and Population Health Nursing, University of Washington, Seattle, WA, USA
| | - Karen J Sherman
- Kaiser Permanente WA Health Research Institute, Seattle, WA, USA.,Department of Epidemiology, University of Washington, Seattle, WA, USA
| | - Rene J Hawkes
- Kaiser Permanente WA Health Research Institute, Seattle, WA, USA
| | - Elizabeth A Phelan
- Department of Medicine and Health Services, University of Washington, Seattle, WA, USA
| | - Judith A Turner
- Department of Psychiatry and Behavioral Sciences, University of Washington School of Medicine, Seattle, WA, USA.,Department of Rehabilitation Medicine, University of Washington School of Medicine, Seattle, WA, USA
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22
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Wayne P, Bernstein C, Kowalski M, Connor J, Osypiuk K, Long C, Vining R, Macklin E, Rist P. The Integrative Migraine Pain Alleviation through Chiropractic Therapy (IMPACT) trial: Study rationale, design and intervention validation. Contemp Clin Trials Commun 2020; 17:100531. [PMID: 32043014 PMCID: PMC6997836 DOI: 10.1016/j.conctc.2020.100531] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/06/2020] [Accepted: 01/19/2020] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Approximately 15% of the US population experiences migraine, with women afflicted three times as often as men. While medications are often used as first-line treatments, up to 50% of people with migraine pursue complementary and integrative medicine. One promising non-pharmacological approach for migraine is chiropractic care, due to the co-occurrence of migraine disease and musculoskeletal tension and pain. To date, no large-scale trials have evaluated the impact of a comprehensive model of chiropractic care on migraine. METHODS The Integrative Migraine Pain Alleviation through Chiropractic Therapy (IMPACT) study is a two-arm pilot pragmatic randomized clinical trial evaluating a multimodal chiropractic care intervention plus enhanced usual care (UC) vs. enhanced UC alone for adult women with episodic migraine. A total of 60 women aged 20-55 who meet criteria for episodic migraine will be randomly assigned to an evidence-informed, musculoskeletal focused multimodal chiropractic care (10 sessions over 14 weeks) plus enhanced UC vs. enhanced UC alone. Enhanced UC includes conventional care, migraine education materials, and biweekly check-in phone calls. Study specific aims include: 1) Determine safety and feasibility of the study design; 2) Provide preliminary data on the effectiveness of chiropractic care on migraine frequency, severity, duration and medication use; and 3) Provide preliminary estimates of the effects of chiropractic care on disability, health-related quality of life, and psychosocial well-being. DISCUSSION Findings will be used to inform the design of a full-scale trial evaluating chiropractic care for women with episodic migraines.
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Affiliation(s)
- P.M. Wayne
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
- Division of Preventive Medicine, Department of Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
| | - C. Bernstein
- John Graham Headache Center, Department of Neurology, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
- Osher Clinical Center, Brigham and Women's Hospital, Boston, MA, USA
| | - M. Kowalski
- Osher Clinical Center, Brigham and Women's Hospital, Boston, MA, USA
| | - J.P. Connor
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
| | - K. Osypiuk
- Osher Center for Integrative Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
| | - C.R. Long
- Palmer College of Chiropractic, Davenport, IA, USA
| | - R. Vining
- Palmer College of Chiropractic, Davenport, IA, USA
| | - E. Macklin
- Biostatistics Center, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - P.M. Rist
- Division of Preventive Medicine, Department of Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA
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Pikus H, Harbaugh R. Commentary on: A risk-benefit assessment strategy to exclude cervical artery dissection in spinal manual therapy: a comprehensive review. Ann Med 2019; 51:330-331. [PMID: 31282743 PMCID: PMC7877872 DOI: 10.1080/07853890.2019.1639807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Harold Pikus
- Upper Valley Neurology Neurosurgery , Lebanon , NH , USA
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Chaibi A, Russell MB. A risk-benefit assessment strategy to exclude cervical artery dissection in spinal manual-therapy: a comprehensive review. Ann Med 2019; 51:118-127. [PMID: 30889367 PMCID: PMC7857472 DOI: 10.1080/07853890.2019.1590627] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Cervical artery dissection refers to a tear in the internal carotid or the vertebral artery that results in an intramural haematoma and/or an aneurysmal dilatation. Although cervical artery dissection is thought to occur spontaneously, physical trauma to the neck, especially hyperextension and rotation, has been reported as a trigger. Headache and/or neck pain is the most common initial symptom of cervical artery dissection. Other symptoms include Horner's syndrome and lower cranial nerve palsy. Both headache and/or neck pain are common symptoms and leading causes of disability, while cervical artery dissection is rare. Patients often consult their general practitioner for headache and/or neck pain, and because manual-therapy interventions can alleviate headache and/or neck pain, many patients seek manual therapists, such as chiropractors and physiotherapists. Cervical mobilization and manipulation are two interventions that manual therapists use. Both interventions have been suspected of being able to trigger cervical artery dissection as an adverse event. The aim of this review is to provide an updated step-by-step risk-benefit assessment strategy regarding manual therapy and to provide tools for clinicians to exclude cervical artery dissection. Key messages Cervical mobilization and/or manipulation have been suspected to be able to trigger cervical artery dissection (CAD). However, these assumptions are based on case studies which are unable to established direct causality. The concern relates to the chicken and the egg discussion, i.e. whether the CAD symptoms lead the patient to seek cervical manual-therapy or whether the cervical manual-therapy provoked CAD along with the non-CAD presenting complaint. Thus, instead of proving a nearly impossible causality hypothesis, this study provide clinicians with an updated step-by-step risk-benefit assessment strategy tool to (a) facilitate clinicians understanding of CAD, (b) appraise the risk and applicability of cervical manual-therapy, and (c) provide clinicians with adequate tools to better detect and exclude CAD in clinical settings.
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Affiliation(s)
- Aleksander Chaibi
- a Head and Neck Research Group, Research Centre, Akershus University Hospital , Oslo , Norway.,b Institute of Clinical Medicine, Akershus University Hospital, University of Oslo , Nordbyhagen , Norway
| | - Michael Bjørn Russell
- a Head and Neck Research Group, Research Centre, Akershus University Hospital , Oslo , Norway.,b Institute of Clinical Medicine, Akershus University Hospital, University of Oslo , Nordbyhagen , Norway
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Abstract
Integrative medicine (IM) has developed an increasingly significant role in health care worldwide, including cardiovascular diseases (CVD). This review describes the commonly used IM in CVD, with particular attention placed with dietary supplements and mind-body therapies. More rigorous research continues to be needed to determine the mechanisms and efficacy of IM cardiovascular morbidity and mortality. Health care providers will need to develop skills in open communication and nonjudgmental dialogue around IM use in discussing treatment plans with their patients.
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Affiliation(s)
- Darshan Mehta
- Osher Center for Integrative Medicine, Brigham and Women's Hospital, Harvard Medical School, 900 Commonwealth Avenue East, 3rd Floor, Boston, MA 02215, USA; Benson-Henry Institute for Mind-Body Medicine, Massachusetts General Hospital, 151 Merrimac Street, 4th Floor, Boston, MA 02114, USA.
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Swait G, Finch R. What are the risks of manual treatment of the spine? A scoping review for clinicians. Chiropr Man Therap 2017; 25:37. [PMID: 29234493 PMCID: PMC5719861 DOI: 10.1186/s12998-017-0168-5] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 11/08/2017] [Indexed: 12/20/2022] Open
Abstract
Background Communicating to patients the risks of manual treatment to the spine is an important, but challenging element of informed consent. This scoping review aimed to characterise and summarise the available literature on risks and to describe implications for clinical practice and research. Method A methodological framework for scoping reviews was followed. Systematic searches were conducted during June 2017. The quantity, nature and sources of literature were described. Findings of included studies were narratively summarised, highlighting key clinical points. Results Two hundred and fifty articles were included. Cases of serious adverse events were reported. Observational studies, randomised studies and systematic reviews were also identified, reporting both benign and serious adverse events.Benign adverse events were reported to occur commonly in adults and children. Predictive factors for risk are unclear, but for neck pain patients might include higher levels of neck disability or cervical manipulation. In neck pain patients benign adverse events may result in poorer short term, but not long term outcomes.Serious adverse event incidence estimates ranged from 1 per 2 million manipulations to 13 per 10,000 patients. Cases are reported in adults and children, including spinal or neurological problems as well as cervical arterial strokes. Case-control studies indicate some association, in the under 45 years age group, between manual interventions and cervical arterial stroke, however it is unclear whether this is causal. Elderly patients have no greater risk of traumatic injury compared with visiting a medical practitioner for neuro-musculoskeletal problems, however some underlying conditions may increase risk. Conclusion Existing literature indicates that benign adverse events following manual treatments to the spine are common, while serious adverse events are rare. The incidence and causal relationships with serious adverse events are challenging to establish, with gaps in the literature and inherent methodological limitations of studies. Clinicians should ensure that patients are informed of risks during the consent process. Since serious adverse events could result from pre-existing pathologies, assessment for signs or symptoms of these is important. Clinicians may also contribute to furthering understanding by utilising patient safety incident reporting and learning systems where adverse events have occurred.
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Affiliation(s)
- Gabrielle Swait
- The Royal College of Chiropractors, Chiltern Chambers, St. Peters Avenue, Reading, RG4 7DH UK
| | - Rob Finch
- The Royal College of Chiropractors, Chiltern Chambers, St. Peters Avenue, Reading, RG4 7DH UK
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Mansholt BA, Salsbury SA, Corber LG, Stites JS. Essential literature for the chiropractic profession: Results and implementation challenges from a survey of international chiropractic faculty. THE JOURNAL OF CHIROPRACTIC EDUCATION 2017; 31:140-163. [PMID: 28768114 PMCID: PMC5656150 DOI: 10.7899/jce-17-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
OBJECTIVE Scientific literature applicable to chiropractic practice proliferates in quantity, quality, and source. Chiropractic is a worldwide profession and varies in scope between states or provinces and from country to country. It is logical to consider that the focus and emphasis of chiropractic education varies between programs as well. This original research study endeavored to determine "essential literature" recommended by chiropractic faculty. The purpose of this article is (1) to share our results and (2) to promote discussion and explore means for future collaboration of chiropractic faculty through a worldwide platform. METHODS A 2-phase recruitment occurred initially at the institutional level and subsequently at the faculty level. A Web-based survey used qualitative data collection methods to gather bibliographic citations. Descriptive statistics were calculated for demographics, and citation responses were ranked per number of recommendations, grouped into categories, and tabulated per journal source and publication date. RESULTS Forty-one chiropractic programs were contacted, resulting in 30 participating chiropractic programs (16 US and 14 international). Forty-five faculty members completed the entire survey, submitting 126 peer-reviewed publications and 25 additional citations. Readings emphasized clinical management of spine pain, the science of spinal manipulation, effectiveness of manual therapies, teaching of chiropractic techniques, outcomes assessments, and professional issues. CONCLUSION A systematic approach to surveying educators in international chiropractic institutions was accomplished. The results of the survey provide a list of essential literature for the chiropractic profession. We recommend establishing a chiropractic faculty registry for improved communication and collaboration.
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Hawk C, Schneider MJ, Haas M, Katz P, Dougherty P, Gleberzon B, Killinger LZ, Weeks J. Best Practices for Chiropractic Care for Older Adults: A Systematic Review and Consensus Update. J Manipulative Physiol Ther 2017; 40:217-229. [DOI: 10.1016/j.jmpt.2017.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/10/2016] [Accepted: 02/02/2017] [Indexed: 12/29/2022]
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Murphy DR, Schneider MJ, Perle SM, Bise CG, Timko M, Haas M. Does case misclassification threaten the validity of studies investigating the relationship between neck manipulation and vertebral artery dissection stroke? No. Chiropr Man Therap 2016; 24:43. [PMID: 27826415 PMCID: PMC5097434 DOI: 10.1186/s12998-016-0124-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 09/21/2016] [Indexed: 12/17/2022] Open
Abstract
Background The purported relationship between cervical manipulative therapy (CMT) and stroke related to vertebral artery dissection (VAD) has been debated for several decades. A large number of publications, from case reports to case–control studies, have investigated this relationship. A recent article suggested that case misclassification in the case–control studies on this topic resulted in biased odds ratios in those studies. Discussion Given its rarity, the best epidemiologic research design for investigating the relationship between CMT and VAD is the case–control study. The addition of a case-crossover aspect further strengthens the scientific rigor of such studies by reducing bias. The most recent studies investigating the relationship between CMT and VAD indicate that the relationship is not causal. In fact, a comparable relationship between vertebral artery-related stroke and visits to a primary care physician has been observed. The statistical association between visits to chiropractors and VAD can best be explained as resulting from a patient with early manifestation of VAD (neck pain with or without headache) seeking the services of a chiropractor for relief of this pain. Sometime after the visit the patient experiences VAD-related stroke that would have occurred regardless of the care received. This explanation has been challenged by a recent article putting forth the argument that case misclassification is likely to have biased the odds ratios of the case–control studies that have investigated the association between CMT and vertebral artery related stroke. The challenge particularly focused on one of the case–control studies, which had concluded that the association between CMT and vertebral artery related stroke was not causal. It was suggested by the authors of the recent article that misclassification led to an underestimation of risk. We argue that the information presented in that article does not support the authors’ claim for a variety of reasons, including the fact that the assumptions upon which their analysis is based lack substantiation and the fact that any possible misclassification would not have changed the conclusion of the study in question. Conclusion Current evidence does not support the notion that misclassification threatens the validity of recent case–control studies investigating the relationship between CMT and VAD. Hence, the recent re-analysis cannot refute the conclusion from previous studies that CMT is not a cause of VAD.
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Affiliation(s)
- Donald R Murphy
- Care New England Health System, Department of Family Medicine, Alpert Medical School of Brown University, 600 Pawtucket Avenue, Pawtucket, RI 02860 USA
| | - Michael J Schneider
- University of Pittsburgh, Bridgeside Point 1, 100 Technology Drive, Suite 210, Pittsburgh, PA 15219-3130 USA
| | | | - Christopher G Bise
- School of Health and Rehabilitation Science, University of Pittsburgh, Bridgeside Point 1, 100 Technology Drive, Suite 210, Pittsburgh, PA 15219-3130 USA
| | - Michael Timko
- Department of Physical Therapy, University of Pittsburgh, Bridgeside Point Suite 228, 100 Technology Drive, Pittsburgh, PA 15219-3130 USA
| | - Mitchell Haas
- University of Western States, 2900 NE 132nd Avenue, Portland, OR 97230 USA
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Marcon AR, Klostermann P, Caulfield T. Chiropractic and Spinal Manipulation Therapy on Twitter: Case Study Examining the Presence of Critiques and Debates. JMIR Public Health Surveill 2016; 2:e153. [PMID: 27637456 PMCID: PMC5045521 DOI: 10.2196/publichealth.5739] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/04/2016] [Accepted: 08/21/2016] [Indexed: 12/18/2022] Open
Abstract
Background Spinal manipulation therapy (SMT) is a popular though controversial practice. The debates surrounding efficacy and risk of SMT are only partially evident in popular discourse. Objective This study aims to investigate the presence of critiques and debates surrounding efficacy and risk of SMT on the social media platform Twitter. The study examines whether there is presence of debate and whether critical information is being widely disseminated. Methods An initial corpus of 31,339 tweets was compiled through Twitter’s Search Application Programming Interface using the query terms “chiropractic,” “chiropractor,” and “spinal manipulation therapy.” Tweets were collected for the month of December 2015. Post removal of tweets made by bots and spam, the corpus totaled 20,695 tweets, of which a sample (n=1267) was analyzed for skeptical or critical tweets. Additional criteria were also assessed. Results There were 34 tweets explicitly containing skepticism or critique of SMT, representing 2.68% of the sample (n=1267). As such, there is a presence of 2.68% of tweets in the total corpus, 95% CI 0-6.58% displaying explicitly skeptical or critical perspectives of SMT. In addition, there are numerous tweets highlighting the health benefits of SMT for health issues such as attention deficit hyperactivity disorder (ADHD), immune system, and blood pressure that receive scant critical attention. The presence of tweets in the corpus highlighting the risks of “stroke” and “vertebral artery dissection” is also minute (0.1%). Conclusions In the abundance of tweets substantiating and promoting chiropractic and SMT as sound health practices and valuable business endeavors, the debates surrounding the efficacy and risks of SMT on Twitter are almost completely absent. Although there are some critical voices of SMT proving to be influential, issues persist regarding how widely this information is being disseminated.
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Affiliation(s)
- Alessandro R Marcon
- Health Law Institute, Department of Law, University of Alberta, Edmonton, AB, Canada
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Gorrell LM, Engel RM, Brown B, Lystad RP. The reporting of adverse events following spinal manipulation in randomized clinical trials-a systematic review. Spine J 2016; 16:1143-51. [PMID: 27241208 DOI: 10.1016/j.spinee.2016.05.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Revised: 04/25/2016] [Accepted: 05/25/2016] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Spinal manipulative therapy (SMT) is commonly used to treat spinal disorders. Although clinical practice guidelines recommend the use of SMT in the treatment of neck and back disorders, concerns exist about the nature and incidence of adverse events associated with the intervention. Comprehensive reporting of adverse events in clinical trials could allow for accurate incidence estimates through meta-analysis. However, it is not clear if randomized clinical trials (RCTs) that involve SMT are currently reporting adverse events adequately. PURPOSE This study aimed to describe the extent of adverse events reporting in published RCTs involving SMT, and to determine whether the quality of reporting has improved since publication of the 2010 Consolidated Standards Of Reporting Trials (CONSORT) statement. STUDY DESIGN This is a systematic literature review. METHODS The Physiotherapy Evidence Database (PEDro) and the Cochrane Central Register of Controlled Trials (CENTRAL) were searched for RCTs involving SMT. Domains of interest included classifications of adverse events, completeness of adverse events reporting, nomenclature used to describe the events, methodological quality of the study, and details of the publishing journal. Data were analyzed using descriptive statistics. Frequencies and proportions of trials reporting on each of the specified domains above were calculated. Differences in proportions between pre- and post-CONSORT trials were calculated with 95% confidence intervals using standard methods, and statistical comparisons were analyzed using tests for equality of proportions with continuity correction. There was no funding obtained for this study. The authors declare no conflict of interest. RESULTS Of 7,398 records identified in the electronic searches, 368 articles were eligible for inclusion in this review. Adverse events were reported in 140 (38.0%) articles. There was a significant increase in the reporting of adverse events post-CONSORT (p=.001). There were two major adverse events reported (0.3%). Only 22 articles (15.7%) reported on adverse events in the abstract. There were no differences in reporting of adverse events post-CONSORT for any of the chosen parameters. CONCLUSIONS Although there has been an increase in reporting adverse events since the introduction of the 2010 CONSORT guidelines, the current level should be seen as inadequate and unacceptable. We recommend that authors adhere to the CONSORT statement when reporting adverse events associated with RCTs that involve SMT.
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Affiliation(s)
- Lindsay M Gorrell
- Department of Chiropractic, Macquarie University, Sydney 2109, Australia; Human Performance Laboratory, Faculty of Kinesiology, University of Calgary, Calgary, Alberta T2N 1N4, Canada.
| | - Roger M Engel
- Department of Chiropractic, Macquarie University, Sydney 2109, Australia
| | - Benjamin Brown
- Department of Chiropractic, Macquarie University, Sydney 2109, Australia
| | - Reidar P Lystad
- Department of Chiropractic, Macquarie University, Sydney 2109, Australia
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