Background   The symptom ‘dizziness’ is common in patients with chronic whiplash related disorders. However, little is known about dizziness in neck pain patients who have not suffered whiplash. Therefore, the purposes of this study are to compare baseline factors and clinical outcomes of neck pain patients with and without dizziness undergoing chiropractic treatment and to compare outcomes based on gender.

Methods   This prospective cohort study compares adult neck pain patients with dizziness (n = 177) to neck pain patients without dizziness (n = 228) who presented for chiropractic treatment, (no chiropractic or manual therapy in the previous 3 months). Patients completed the numerical pain rating scale (NRS) and Bournemouth questionnaire (BQN) at baseline. At 1, 3 and 6 months after start of treatment the NRS and BQN were completed along with the Patient Global Impression of Change (PGIC) scale. Demographic information was also collected. Improvement at each follow-up data collection point was categorized using the PGIC as ‘improved’ or ‘not improved’. Differences between the two groups for NRS and BQN subscale and total scores were calculated using the unpaired Student’s t-test. Gender differences between the patients with dizziness were also calculated using the unpaired t-test.

Results   Females accounted for 75% of patients with dizziness. The majority of patients with and without dizziness reported clinically relevant improvement at 1, 3 and 6 months with 80% of patients with dizziness and 78% of patients without dizziness being improved at 6 months. Patients with dizziness reported significantly higher baseline NRS and BQN scores, but at 6 months there were no significant differences between patients with and without dizziness for any of the outcome measures. Females with dizziness reported higher levels of depression compared to males at 1, 3 and 6 months (p = 0.007, 0.005, 0.022).

Conclusions   Neck pain patients with dizziness reported significantly higher pain and disability scores at baseline compared to patients without dizziness. A high proportion of patients in both groups reported clinically relevant improvement on the PGIC scale. At 6 months after start of chiropractic treatment there were no differences in any outcome measures between the two groups.

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Introduction

The complaint of neck pain is second only to low back pain in terms of common musculoskeletal problems in society today with a lifetime prevalence of 26-71% and a yearly prevalence of 30-50%. [1, 2] Most concerning is that many patients, particularly those in the working population or who have suffered whiplash trauma, will become chronic and continue to report pain and disability for greater than 6-months. [3-6] In terms of symptoms, dizziness and unsteadiness are the most frequent complaints following pain for chronic whiplash sufferers with up to 70% of patients reporting these problems. [7, 8] Apart from whiplash trauma, little is known about dizziness in the chronic neck pain population and much remains unknown about the etiology of chronic neck pain in general. [9]

Gender differences in reporting pain intensity is currently a topic of debate. Recent research suggests that females report more pain because they feel pain more intensely than males over a variety of musculoskeletal complaints. [10, 11] Furthermore, LeResche suggests that these differences may not be taken into account by health care providers, leading to less than optimal pain management for females. [12] However gender differences in neck pain patients with or without dizziness have not been described with respect to clinical outcomes over time.

Therefore, the purposes of this study on neck pain patients receiving chiropractic care are twofold:

1. to compare baseline variables and the clinical outcomes of neck pain patients with and without dizziness in terms of clinically relevant ‘improvement’, pain, disability, and psychosocial variables over a 6-month period;
2. to evaluate gender differences for neck pain patients with dizziness in terms of clinically relevant ‘improvement’, pain, disability, and psychosocial variables in a longitudinal study.

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By: Lynn Shaw, Martin Descarreaux, Roland Bryans, Mireille Duranleau, Henri Marcoux, Brock Potter, Rick Ruegg, Robert Watkin, Eleanor White

Authors’ Abstract:

The literature relevant to the treatment of Whiplash Associated Disorders (WAD) is extensive and heterogeneous.

Methods: A Participatory Action Research (PAR) approach was used to engage a chiropractic community of practice and stakeholders in a systematic Review to address a general question: ‘Does chiropractic management of WAD clients have an effect on improving health status?’ A systematic review of the empirical studies relevant to WAD interventions was conducted followed by a review of the evidence.

Results: The initial search identified 1155 articles. Ninety-two of the articles were retrieved, and 27 articles consistent with specific criteria of WAD intervention were analyzed in-depth. The best evidence supporting the chiropractic management of clients with WAD is reported. For the review identified ways to overcome gaps needed to inform clinical practice and culminated in the development of a proposed care model: The WAD-Plus Model.

Conclusions: There is a baseline of evidence that suggests chiropractic care improves the cervical range of motion (cROM) and pain in the management of WAD. However, the level of this evidence relevant to clinical practice remains low or draws on clinical consensus at this time. The WAD-Plus Model has implications for use by chiropractors and interdisciplinary professionals in the assessment and management of acute, sub-acute and chronic pain due to WAD. Furthermore, the WAD-Plus Model can be used in the future study of interventions and outcomes to advanced evidenced-based care in the management of WAD.

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By David BenEliyahu, D.C.

Studies on the efficacy of chiropractic care for patients suffering with pain secondary to whiplash injury are appearing in the literature. In 1996, Woodward et al. published a study in Injury on the efficacy of chiropractic treatment of whiplash injuries. [1] The authors of this study were from the Department of Orthopedic Surgery in Bristol, England.

In 1994, Gargan and Bannister published a paper on the recovery rate of patients with whiplash injuries and found that if patients were still symptomatic after three months, there was almost a 90% chance they would remain so. [2] No conventional medical treatment has been shown to be effective in these established chronic whiplash injury patients. [3, 4] However, most DCs treating whiplash injury patients have empirically found high success rates in the recovery of these types of patients.

In the Woodward study, 93% of the 28 patients studied retrospectively were found to have a statistically significant improvement following chiropractic care. [1] Chiropractic care in this study consisted of spinal manipulation, PNF and cryotherapy. Most of the 28 patients had prior treatment with NSAIDs, soft collars and physiotherapy. The average length of time before the patients began chiropractic care was 15.5 months post-MVA (range of 3-44 months).

This study clearly documented what most DCs experience in clinical practice: that chiropractic care is an effective modality for patients injured in a motor vehicle accident. Symptoms ranging from headaches to neck pain, back pain, interscapular pain and related extremity pain with paresthesias all respond to quality chiropractic care.

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Whiplash is an enigmatic injury. We spend billions of dollars each year to treat it. Yet many lawyers, legislators, and medical doctors deny its existence. It affects millions of people around the world, yet research is severely under-funded. It is a largely preventable injury, yet we do little to prevent it. Fortunately, times are changing as whiplash enters a new phase of research and understanding.

“We now have a completely new model of whiplash,” says Dr. Arthur Croft, researcher and co-author of the well-respected textbook, Whiplash Injuries: The Cervical Acceleration/Deceleration Syndrome. “Back in 1982, when I started practice, we had an extremely simplistic view of whiplash – you got hit from the rear; your head snapped back, which may have caused damage to ligaments, muscles, and tendons; your head snapped forward, which may have caused some additional damage; and then you had symptoms. We weren’t very sophisticated in terms of what we knew, because there hadn’t been much research.”

Dr. Croft is a biomechanist, a trauma epidemiologist, and chiropractic orthopaedist and lectures extensively in the United States and abroad. He serves on the editorial boards of several professional peer-reviewed chiropractic, medical, and engineering journals, including Spine, Archives of Physical Medicine and Rehabilitation, SAE, JMPT, DC Tracts, Journal of Musculoskeletal Pain, Chiropractic Technique, and is a senior editor of the Journal of Whiplash-Related Disorders. He has served as faculty of University of California, San Diego, Southern California University of Health Sciences, Western States Chiropractic College, and New York Chiropractic College. In addition to his own research, Dr. Croft has contributed to several research steering committees and has participated in RAND projects, including the cervical spine manipulation study, and has served as a grant reviewer for the Foundation for Chiropractic Education and Research and the National Institutes of Health. Dr. Croft is also a certified accident reconstructionist (NUTI). He currently serves as a panelist on the International Whiplash Task Force. Dr. Croft’s focus is public health and injury prevention and he is very close to receiving his PhD in epidemiology.

In an interview with The American Chiropractor (TAC), Dr. Croft shares some of the wisdom his studies have distilled.

Dr. Croft, please tell our readers a bit about some of the things you have been able to discover regarding whiplash through research.

Croft:   Most of the discoveries concerning the whiplash phenomenon have come from the eight years of human subject crash testing we’ve done at the Spine Research Institute of San Diego. In many cases, our findings have been new and innovative and, in other cases, they have served to support or extend previous research or theory. We’ve found, for example, that occupant kinematics and biomechanics is much more complicated than previously thought and that smaller persons and larger persons have very different responses. [1] A small female will experience two to four times the head linear acceleration as a larger male in the same crash. The male, however, will experience greater rearward bending.

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