Early coping strategies do not influence the prognosis after whiplash injuries

Neck pain and headache after whiplash injury: a systematic review and meta-analysis

Neck pain and headache are 2 of the most common complications of whiplash injury. Therefore, we performed a systematic literature search on PubMed and Embase for publications reporting on the prevalence of neck pain and headache after whiplash injury. The literature search identified 2709 citations of which 44 contained relevant original data. Of these, 27 studies provided data for the quantitative analysis. For non-population-based studies, the present meta-analysis showed that a pooled relative frequency of neck pain was 84% confidence interval (68%-95%) and a pooled relative frequency of headache was 60% (46%-73%), within 7 days after whiplash injury. At 12 months after injury, 38% (32%-45%) of patients with whiplash still experienced neck pain, while 38% (18%-60%) of whiplash patients reported headache at the same time interval after injury. However, we also found considerable heterogeneity among studies with I-values ranging from 89% to 98% for the aforementioned meta-analyses. We believe that the considerable heterogeneity among studies underscores the need for clear-cut definitions of whiplash injury and standardized reporting guidelines for postwhiplash sequelae such as neck pain and headache. Future studies should seek to optimize these aspects paving the way for a better understanding of the clinical characteristics and natural course of whiplash-associated sequelae.

Is kinesiophobia and pain catastrophising at baseline associated with chronic pain and disability in whiplash-associated disorders? A systematic review

BACKGROUND

Kinesiophobia and pain catastrophising may be associated with patients' transition from having acute to chronic pain following a whiplash injury.

OBJECTIVE

To systematically review and critically appraise the literature to determine whether kinesiophobia and pain catastrophising are associated with greater likelihood of patients developing chronic pain and disability following a whiplash injury.

DESIGN

A systematic review of the literature DATA SOURCES: Electronic searches of PubMed, AMED, CINAHL, PsycINFO, and PubPsych, and grey literature were undertaken from inception to September 2017.

ELIGIBILITY CRITERIA FOR SELECTING STUDIES

Study selection was based on longitudinal studies evaluating how kinesiophobia and/or pain catastrophising at baseline are associated with pain intensity, disability or both after a whiplash injury.

RESULTS

We included 14 longitudinal studies that described 12 independent cohorts with a total sample of 2733 participants with whiplash-associated disorder. Kinesiophobia at baseline was not associated with pain intensity over time (three studies). Whether kinesiophobia at baseline was associated with disability was unclear as results were conflicting (six studies). There were also conflicting results when we examined the association between pain catastrophising and both pain intensity (five studies) and disability (eight studies).

SUMMARY/CONCLUSIONS

Kinesiophobia at baseline was not associated with pain intensity over time. There were conflicting results for the remaining analyses. The size of the associations was small. The overall quality of the evidence was very low.

TRIAL REGISTRATION NUMBER

CRD42016053864.

Review article: Best practice management of neck pain in the emergency department (part 6 of the musculoskeletal injuries rapid review series)

Neck pain and whiplash injuries are a common presentation to the ED, and a frequent cause of disability globally. This rapid review investigated best practice for the assessment and management of musculoskeletal neck pain in the ED. PubMed, CINAHL, EMBASE, TRIP and the grey literature, including relevant organisational websites, were searched in 2017. Primary studies, systematic reviews and guidelines were considered for inclusion. English-language articles published in the past 12 years addressing acute neck pain assessment, management or prognosis in the ED were included. Data extraction was conducted, followed by quality appraisal to rate levels of evidence where possible. The search revealed 2080 articles, of which 51 were included (n = 22 primary articles, n = 13 systematic reviews and n = 16 guidelines). Consistent evidence was found to support the use of 'red flags' to screen for serious pathologies, judicious use of imaging through clinical decision rule application and promotion of functional exercise coupled with advice and reassurance. Clinicians may also consider applying risk-stratification methods, such as using a clinical prediction rule, to guide patient discharge and referral plans; however, the evidence is still emerging in this population. This rapid review provides clinicians managing neck pain in the ED a summary of the best available evidence to enhance quality of care and optimise patient outcomes.

Initial healthcare and coping preferences are associated with outcome 1 year after whiplash trauma: a multicentre 1-year follow-up study

OBJECTIVE

Individuals exposed to whiplash collisions have to cope with the stressful event as well as early physical symptoms. As in other chronic pain conditions, coping has been associated with outcome after whiplash. In this study, our aim was to examine whether initial coping preferences were associated with the development of chronic whiplash.

DESIGN

Prospective study.

SETTING

Primary care.

METHODS

740 acute whiplash patients were recruited from emergency units and general practitioners after car collisions in Denmark. Within 10 days postinjury, participants were asked what they believed could help them get better. At 12-month follow-up, the level of neck pain and capability to work was obtained. Whether coping preferences (baseline) were associated with outcome was investigated using multiple regression analyses.

RESULTS

Persistent neck pain was most strongly associated with preferring medications (mean difference=1.24 (95% CI 0.67 to 1.82)) and sickness absence (mean difference=1.18 (95% CI 0.53 to 1.82)). Reduced work capability was most strongly associated with preferring medications (OR=3.53 (95% CI 2.13 to 5.86)), sickness absence (OR=3.05 (95% CI 1.80 to 5.17)) and being referred to a physiotherapist/chiropractor (OR=3.03 (95% CI 1.33 to 6.91)). Active coping was associated with better outcomes: Participants preferring to change their lifestyle were protected against reduced work capability (OR=0.11 (95% CI 0.01 to 0.78)). Individuals who wanted to keep living as usual only (no other preference reported) were protected against neck pain (mean difference -1.62 (95% CI -2.39 to -0.84)) and reduced work capability (OR=0.09 (95% CI 0.01 to 0.64)).

CONCLUSIONS

A simple nine-item measure of coping preferences is associated with the development of chronic neck pain and reduced capability to work following whiplash trauma and may be used to identify individuals at risk of poor recovery.

Characteristics of coping strategies for dysesthesia in preoperative patients with compressive cervical myelopathy

Study Design

A cross-sectional study.

Purpose

This study aimed to clarify the characteristics of coping strategies for dysesthesia in preoperative patients with compressive cervical myelopathy.

Overview of Literature

Cognitive behavioral therapy is effective for patients with chronic pain in terms of modifying their negative behavior. To effectively perform cognitive behavioral therapy, it is necessary to assess coping strategies because of their important roles in health-related quality of life.

Methods

Sixty-one preoperative patients with compressive cervical myelopathy (men, 39; women, 22; 61.0±11.6 years) participated. Coping strategies for dysesthesia (coping strategies questionnaire) and subjective symptoms (numerical rating scale for dysesthesia intensity and Japanese Orthopaedic Association cervical myelopathy evaluation questionnaire) were investigated.

Results

There were moderately significant correlations among the subcategory scores of the coping strategies questionnaire (Spearman's rank correlation coefficient [rs]≤0.69, p<0.05); the praying/hoping and catastrophizing scores were significantly correlated with the numerical rating scale score of dysesthesia (both; rs=0.34, p<0.01); there were no correlations between the coping strategy scores and the cervical spine function and upper and lower extremity motor function scores of the Japanese Orthopaedic Association cervical myelopathy evaluation questionnaire; and there were no significant associations between the coping strategy scores and age, sex, and symptom duration.

Conclusions

Various combinations of coping strategies for dysesthesia were selected in patients with compressive cervical myelopathy, and frequency of use of the coping strategies was not related to the perceived severity of cervical myelopathy or demographic factors.

Coping and recovery in whiplash-associated disorders: early use of passive coping strategies is associated with slower recovery of neck pain and pain-related disability

OBJECTIVE

Coping is shown to affect outcomes in chronic pain patients; however, few studies have examined the role of coping in the course of recovery in whiplash-associated disorders (WAD). The purpose of this study was to determine the predictive value of coping style for 2 key aspects of WAD recovery, reductions in neck pain, and in disability.

METHODS

A population-based prospective cohort study design was used to study 2986 adults with traffic-related WAD. Participants were assessed at baseline, 6 weeks, and 4, 8, and 12 months postinjury. Coping was measured at 6 weeks using the Pain Management Inventory, and neck pain recovery was assessed at each subsequent follow-up, using a 100 mm visual analogue scale (VAS). Disability was assessed at each follow-up using the Pain Disability Index (PDI). Pain recovery was defined as a VAS score of 0 to 10; disability recovery was defined as a PDI score of 0 to 4. Data analysis used multivariable Cox proportional hazards models.

RESULTS

Those using high versus low levels of passive coping at 6 weeks postinjury experienced 28% slower pain recovery and 43% slower disability recovery. Adjusted hazard rate ratios for pain recovery and disability recovery were 0.72 (95% CI, 0.59-0.88) and 0.57 (95% CI, 0.41-0.78), respectively. Active coping was not associated with recovery of neck pain or disability.

CONCLUSIONS

Passive coping style predicts neck pain and self-assessed disability recovery. It may be beneficial to assess and improve coping style early in WAD.

Coping patterns and their relation to daily activity, worries, depressed mood, and pain intensity in acute whiplash-associated disorders

BACKGROUND

There is a lack of knowledge regarding how individuals with acute whiplash-associated disorders (WAD) appraise and cope with situation-specific stressors.

PURPOSE

The aim of the study was to describe the daily process of coping reported in a daily coping assessment by individuals with acute WAD within 1 month after the accident. More specifically, profiles of coping strategies were identified and patterns between stressors, primary and secondary appraisals, and coping strategy profiles were described in relation to reported level of activity, worries, depressed mood and pain intensity during the day.

METHOD

A descriptive and exploratory design was applied. Two hundred and twenty-nine whiplash-associated disorders-daily coping assessment (WAD-DCA) collected during seven consecutive days from 51 participants with acute WAD in Sweden, were included. Cluster analysis was used to obtain coping strategy profiles and data were graphically visualised as patterns through the coping process.

RESULTS

When measuring coping as a daily process relating to the specific stressful situation, different coping process patterns appeared. During days with a high degree of physical and mental well-being, high self-efficacy beliefs seemed to be working as an important secondary appraisal, whereas during days with a low degree of physical and mental well-being primary appraisals of the stressor as a threat and catastrophic thoughts were present in the coping process.

CONCLUSIONS

Early identification of situational- and individual-specific stressors, appraisals and coping efforts as measured by the WAD-DCA may contribute to the understanding of the coping process in the acute stage of WAD and its possible impact on recovery and adjustment.

Health, social, and economic consequences of neck injuries: a controlled national study evaluating societal effects on patients and their partners

STUDY DESIGN

National register-based matched case-control study.

OBJECTIVE

The aim of this study was to estimate the direct and indirect costs of neck injuries, except fractures, in a national sample of patients and their spouses.

SUMMARY OF BACKGROUND DATA

Despite neck injuries causing significant socioeconomic burdens, there is insufficient information about the time course, as well as the effect on their spouses.

METHODS

Using records from the Danish National Patient Registry 1998-2009, all patients with a diagnosis of neck injury and their spouses were identified and compared with randomly chosen controls matched for age, sex, geographical area, and civil status. Direct costs included frequency of primary and hospital sector contacts and procedures and medication. Indirect costs included the effect on labor supply. Social transfer payments were included to illustrate the effect on national accounts. All cost data were extracted from national databases.

RESULTS

The register contributed 94,224 patients, and 372,341 matched controls were identified. The percentages of married or cohabiting individuals were approximately 47.5% in both groups. Patients with neck injury had significantly higher rates of health-related contacts, medication use, and higher socioeconomic costs than controls. To a lesser extent, they also had lower employment rates, and those employed generally had lower incomes. Furthermore, the patients had already presented negative social- and health-related status up to 11 years before the first diagnosis, which became more pronounced for those with the highest costs. The health effects on costs were present regardless of age group and sex, and it was also seen for the patients' spouses.

CONCLUSION

Neck injuries are associated with major socioeconomic consequences for patients, their spouses, and the society. However, the increased expenses during subsequent years cannot be explained by the injury alone, because these patients already had elevated expenses prior to the injury. This indicates some selection of increased vulnerability for both patients and their spouses.

Risk factors for persistent problems following acute whiplash injury: update of a systematic review and meta-analysis

STUDY DESIGN

Systematic review and meta-analysis.

OBJECTIVE

To update a previous review and meta-analysis on risk factors for persistent problems following whiplash secondary to a motor vehicle accident.

BACKGROUND

Prognosis in whiplash-associated disorder (WAD) has become an active area of research, perhaps owing to the difficulty of treating chronic problems. A previously published review and meta-analysis of prognostic factors included primary sources up to May 2007. Since that time, more research has become available, and an update to that original review is warranted.

METHODS

A systematic search of international databases was conducted, with rigorous inclusion criteria focusing on studies published between May 2007 and May 2012. Articles were scored, and data were extracted and pooled to estimate the odds ratio for any factor that had at least 3 independent data points in the literature.

RESULTS

Four new cohorts (n = 1121) were identified. In combination with findings of a previous review, 12 variables were found to be significant predictors of poor outcome following whiplash, 9 of which were new (n = 2) or revised (n = 7) as a result of additional data. The significant variables included high baseline pain intensity (greater than 5.5/10), report of headache at inception, less than postsecondary education, no seatbelt in use during the accident, report of low back pain at inception, high Neck Disability Index score (greater than 14.5/50), preinjury neck pain, report of neck pain at inception (regardless of intensity), high catastrophizing, female sex, WAD grade 2 or 3, and WAD grade 3 alone. Those variables robust to publication bias included high pain intensity, female sex, report of headache at inception, less than postsecondary education, high Neck Disability Index score, and WAD grade 2 or 3. Three existing variables (preaccident history of headache, rear-end collision, older age) and 1 additional novel variable (collision severity) were refined or added in this updated review but showed no significant predictive value.

CONCLUSION

This review identified 2 additional prognostic factors and refined the estimates of 7 previously identified factors, bringing the total number of significant predictors across the 2 reviews to 12. These factors can be easily identified in a clinical setting to provide estimates of prognosis following whiplash.

Daily stressors in patients with acute whiplash associated disorders

PURPOSE

Stressors in acute whiplash associated disorders (WAD), as reported on a daily basis, have hitherto been neglected in research. The primary aim of this study was to describe the most stressful daily situation or event reported by individuals with acute WAD within a month of a whiplash trauma. Another aim was to describe the meaning and significance of these daily stressors, i.e. primary appraisal.

METHOD

A descriptive design with a content analysis approach was used. 260 WAD-daily coping assessments (WAD-DCA) generated during 1 week by 51 participants with acute WAD were included in the study. Stressors were analysed using qualitative content analysis.

RESULTS

The reported stressors generated 13 categories covering a wide range of stressful situations in daily life related to (i) work, (ii) physical symptoms, (iii) feelings and cognitions, (iv) family and home responsibilities and (v) recreation. The majority of the stressors were appraised as "expected" as well as "disabling". Most threatening stressors were related to work, driving and feelings/cognitions.

CONCLUSIONS

The wide variety of stressors indicates that it is not only pain itself that influences daily life in acute WAD. Early identification of individual and situation-specific stressors gives new data regarding what bothers individuals suffering from WAD after a collision and may be helpful in understanding the coping process in relation to specific stressors and stressor appraisals.

Optimal designs for prediction studies of whiplash

STUDY DESIGN

Commentary.

OBJECTIVE

To provide guidance for the design and interpretation of predictive studies of whiplash associated disorders (WAD).

SUMMARY OF BACKGROUND DATA

Numerous studies have sought to define and explain the clinical course and response to treatment of people with WAD. Design of these studies is often suboptimal, which can lead to biased findings and issues with interpreting the results.

METHODS

Literature review and commentary.

RESULTS

Predictive studies can be grouped into four broad categories; studies of symptomatic course, studies that aim to identify factors that predict outcome, studies that aim to isolate variables that are causally responsible for outcome, and studies that aim to identify patients who respond best to particular treatments. Although the specific research question will determine the optimal methods, there are a number of generic features that should be incorporated into design of such studies. The aim of these features is to minimize bias, generate adequately precise prognostic estimates, and ensure generalizability of the findings.

CONCLUSION

This paper provides a summary of important considerations in the design, conduct, and reporting of prediction studies in the field of whiplash.

Are MRI high-signal changes of alar and transverse ligaments in acute whiplash injury related to outcome?

Background

Upper neck ligament high-signal changes on magnetic resonance imaging (MRI) have been found in patients with whiplash-associated disorders (WAD) but also in non-injured controls. The clinical relevance of such changes is controversial. Their prognostic role has never been evaluated. The purpose of this study was to examine if alar and transverse ligament high-signal changes on MRI immediately following the car accident are related to outcome after 12 months for patients with acute WAD grades 1-2.

Methods

Within 13 days after a car accident, 114 consecutive acute WAD1-2 patients without prior neck injury or prior neck problems underwent upper neck high-resolution proton-weighted MRI. High-signal changes of the alar and transverse ligaments were graded 0-3. A questionnaire including the impact of event scale for measuring posttraumatic stress response and questions on patients' expectations of recovery provided clinical data at injury. At 12 months follow-up, 111 (97.4%) patients completed the Neck Disability Index (NDI) and an 11-point numeric rating scale (NRS-11) on last week neck pain intensity. Factors potentially related to these outcomes were assessed using multiple logistic regression analyses.

Results

Among the 111 responders (median age 29.8 years; 63 women), 38 (34.2%) had grades 2-3 alar ligament changes and 25 (22.5%) had grades 2-3 transverse ligament changes at injury. At 12 months follow-up, 49 (44.1%) reported disability (NDI > 8) and 23 (20.7%) neck pain (NRS-11 > 4). Grades 2-3 ligament changes in the acute phase were not related to disability or neck pain at 12 months. More severe posttraumatic stress response increased the odds for disability (odds ratio 1.46 per 10 points on the impact of event scale, p = 0.007) and so did low expectations of recovery (odds ratio 4.66, p = 0.005).

Conclusions

High-signal changes of the alar and transverse ligaments close after injury did not affect outcome for acute WAD1-2 patients without previous neck problems. High-resolution upper neck MRI has limited value for the initial examination and follow-up of such patients.

Maintaining a balance: a focus group study on living and coping with chronic whiplash-associated disorder

Background

There is little qualitative insight into how persons with chronic Whiplash-Associated Disorder cope on a day to day basis. This study seeks to identify the symptoms persons with Whiplash-Associated Disorder describe as dominating and explore their self-initiated coping strategies.

Methods

Qualitative study using focus groups interviews. Fourteen Norwegian men and women with Whiplash-Associated Disorder (I or II) were recruited to participate in two focus groups. Data were analyzed according to a phenomenological approach, and discussed within the model of Cognitive Activation Theory of Stress (CATS).

Results

Participants reported neck and head pain, sensory hypersensitivity, and cognitive dysfunction following their whiplash injury. Based on the intensity of symptoms, participants divided everyday life into good and bad periods. In good periods the symptoms were perceived as manageable. In bad periods the symptoms intensified and took control of the individual. Participants expressed a constant notion of trying to balance their three main coping strategies; rest, exercise, and social withdrawal. In good periods participants experienced coping by expecting good results from the strategies they used. In bad periods they experienced no or negative relationships between their behavioral strategies and their complaints.

Conclusions

Neck and head pain, sensory hypersensitivity, and cognitive dysfunction were reported as participants' main complaints. A constant notion of balancing between their three main coping strategies; rest, exercise, and social withdrawal, was described.

The Course of Symptoms for Whiplash-Associated Disorders in Sweden: 6-Month Followup Study

Objective.

To describe symptom patterns and the course for recovery in persons with whiplash-associated disorders (WAD) over 6 months after a car collision, and to investigate associated gender differences.

Methods.

The study population was based on insurance claimants, 18–74 years of age, who reported WAD after a collision, between January 2004 and January 2005. At baseline and again 6 months later they were asked to complete a questionnaire that included questions about presence and severity of pain and other possible WAD symptoms. It also included measurements of posttraumatic stress as well as anxiety and depression.

Results.

A total of 1105 persons were studied. The most common symptoms at baseline after neck pain were reduced cervical range of motion (in 83.9% of men, 82.2% of women), headache (61.0% and 69.3%, respectively), and low back pain (35.9% and 36.1%). Some symptoms were already transient at baseline and symptoms such as neck pain, reduced cervical range of motion, headache, and low back pain decreased further over the 6 months. Baseline prevalence of depression was around 5% in both women and men, whereas posttraumatic stress and anxiety were more common in women (19.7% and 11.7%, respectively) compared to men (13.2% and 8.6%). The majority of all reported associated symptoms were mild at both baseline and followup.

Conclusion.

Our findings support that the symptom pattern of WAD and the prevalence for many of the symptoms decreased over a 6-month period.

Cognitive determinants of pain and disability in patients with chronic whiplash-associated disorder: a cross-sectional observational study

OBJECTIVE

To delineate the relative extent to which specific cognitive factors are related to levels of pain and disability in patients with chronic whiplash-associated disorder.

DESIGN

Cross-sectional observation study.

SETTING

Three secondary care physiotherapy departments in the Greater Manchester region of the UK.

PARTICIPANTS

All patients with chronic whiplash-associated disorder referred to the participating departments were invited to take part in the study. In total, 124 patients were invited to participate, and 63 (51%) agreed to do so. Complete data were available for 55 (44%) of those invited to participate in the study.

MAIN OUTCOME MEASURES

Pain and disability, as assessed by the Neck Disability Index.

RESULTS

Cognitive factors were strongly related to levels of disability (R(2) change=0.39, P<0.001). Specifically, greater catastrophising (beta=0.41, P<0.01) and lower functional self-efficacy beliefs (beta=-0.47, P<0.001) were significantly related to greater levels of disability. Significant univariate correlations were seen between the cognitive factors and current pain intensity. However, no significant associations were seen between the cognitive factors and current pain intensity in the multivariate analysis.

CONCLUSIONS

Interventions which aim to reduce catastrophising and enhance functional self-efficacy beliefs should be included alongside conventional physiotherapy interventions when treating patients with chronic whiplash-associated disorder.

A review of the definitions of 'recovery' used in prognostic studies on whiplash using an ICF framework

PURPOSE

The purpose of this article is to review the various definitions of recovery used in the prognostic whiplash literature to date, and to evaluate them from the framework of the International Classification of Functioning, Disability and Health (ICF).

METHODS

Reference lists of previous systematic reviews and meta-analyses on the topic were reviewed and citations were retrieved. An updated Medline search was performed. Recovery rates and the method for operationalising recovery were extracted and evaluated for their fit within the ICF model of health. Descriptive statistics were calculated and presented.

RESULTS

Thirty-one independent cohorts were identified. In total, 30 different primary methods for defining recovery were described in the sample of literature. Eighty-three percent of the primary outcomes fit within the body structure and function domain of the ICF. Restricted participation was the second most common domain represented, followed by activity limitations. Even within each domain, there is wide variability in the cut-off values for dichotomising a group as recovered or not.

CONCLUSIONS

The wide range of recovery rates reported in the literature can be at least partly accounted for by the lack of a standardised definition of recovery after acute whiplash. The emphasis on symptoms in the current literature neglects other important aspects of health as described by the ICF.

Characterization of acute and chronic whiplash-associated disorders

SYNOPSIS

The development of chronic pain and disability following whiplash injury is common and contributes substantially to personal and economic costs related with this condition. Emerging evidence demonstrates the clinical presence of alterations in the sensory and motor systems, including psychological distress in all individuals with a whiplash injury, regardless of recovery. However, individuals who transition to the chronic state present with a more complex clinical picture characterized by the presence of widespread sensory hypersensitivity, as well as significant posttraumatic stress reactions. Based on the diversity of the signs and symptoms experienced by individuals with a whiplash condition, clinicians must take into account the more readily observable/measurable differences in motor, sensory, and psychological dysfunction. The implications for the assessment and management of this condition are discussed. Further review into the pathomechanical, pathoanatomical, and pathophysiological features of the condition also will be discussed.

LEVEL OF EVIDENCE

Level 5.J

Risk factors for persistent problems following whiplash injury: results of a systematic review and meta-analysis

STUDY DESIGN

Systematic review and meta-analysis.

BACKGROUND

Whiplash-associated disorder (WAD) is the most common reported injury following motor vehicle accident. Evidence for prognosis and intervention are difficult to interpret due to differences in inception times, outcomes used, and sample heterogeneity.

METHODS

An extensive literature search was conducted to identify published studies of prognosis following whiplash. Rigorous inclusion criteria were applied to allow for meaningful results to be drawn. Data were extracted, transformed where necessary, and pooled to allow estimation of the odds ratio for any factor with at least 3 data points in the literature.

RESULTS

From 11 cohorts (n = 3193), 25 factors were identified with at least 3 data points in the existing literature. Of these, 9 were found to be significant predictors based on the odds ratio and confidence limits: no postsecondary education, female gender, history of previous neck pain,baseline neck pain intensity greater than 55/100, presence of neck pain at baseline, presence of headache at baseline, catastrophizing, WAD grade 2 or 3, and no seat belt in use at time of collision. Neck pain intensity, WAD grade, headache, and no postsecondary education were robust to publication bias.

CONCLUSIONS

Using a rigorous process for the identification and extraction of data from a homogenous subset of the prognostic WAD literature, we were able to identify several factors for which information is easy to collect clinically and could provide clinicians with a good sense of prognosis following whiplash injury.

Course and prognostic factors for neck pain in whiplash-associated disorders (WAD): results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders

STUDY DESIGN

Best evidence synthesis.

OBJECTIVE

To perform a best evidence synthesis on the course and prognostic factors for neck pain and its associated disorders in Grades I-III whiplash-associated disorders (WAD).

SUMMARY OF BACKGROUND DATA

Knowledge of the course of recovery of WAD guides expectations for recovery. Identifying prognostic factors assists in planning management and intervention strategies and effective compensation policies to decrease the burden of WAD.

METHODS

The Bone and Joint Decade 2000-2010 Task Force on Neck Pain and its Associated Disorders (Neck Pain Task Force) conducted a critical review of the literature published between 1980 and 2006 to assemble the best evidence on neck pain and its associated disorders. Studies meeting criteria for scientific validity were included in a best evidence synthesis.

RESULTS

We found 226 articles related to course and prognostic factors in neck pain and its associated disorders. After a critical review, 70 (31%) were accepted on scientific merit; 47 of these studies related to course and prognostic factors in WAD. The evidence suggests that approximately 50% of those with WAD will report neck pain symptoms 1 year after their injuries. Greater initial pain, more symptoms, and greater initial disability predicted slower recovery. Few factors related to the collision itself (for example, direction of the collision, headrest type) were prognostic; however, postinjury psychological factors such as passive coping style, depressed mood, and fear of movement were prognostic for slower or less complete recovery. There is also preliminary evidence that the prevailing compensation system is prognostic for recovery in WAD.

CONCLUSION

The Neck Pain Task Force undertook a best evidence synthesis to establish a baseline of the current best evidence on the course and prognosis for WAD. Recovery of WAD seems to be multifactorial.

Course and prognostic factors of whiplash: a systematic review and meta-analysis

We conducted a systematic review and meta-analysis of prospective cohort studies of subjects with acute whiplash injuries. The aim was to describe the course of recovery, pain and disability symptoms and also to assess the influence of different prognostic factors on outcome. Studies were selected for inclusion if they enrolled subjects with neck pain within six weeks of a car accident and measured pain and/or disability outcomes. Studies were located via a sensitive search of electronic databases; Medline, Embase, CINAHL, Cochrane database, ACP Journal club, DARE and Psychinfo and through hand-searches of relevant previous reviews. Methodological quality of all studies was assessed using a six item checklist. Sixty-seven articles, describing 38 separate cohorts were included. Recovery rates were extremely variable across studies but homogeneity was improved when only data from studies of more robust methodological quality were considered. These data suggest that recovery occurs for a substantial proportion of subjects in the initial 3 months after the accident but after this time recovery rates level off. Pain and disability symptoms also reduce rapidly in the initial months after the accident but show little improvement after 3 months have elapsed. Data regarding the prognostic factors associated with poor recovery were difficult to interpret due to heterogeneity of the techniques used to assess such associations and the way in which they are reported. There was also wide variation in the measurement of outcome and the use of validated measures would improve interpretability and comparability of future studies.

A systematic literature review of psychological factors and the development of late whiplash syndrome

This systematic literature review aims to assess the prognostic value of psychological factors in the development of late whiplash syndrome (LWS). We included prospective cohort studies that provided a baseline measure of at least one psychological variable and used outcome measures relating to LWS (i.e. pain or disability persisting 6 months post injury). A search of electronic databases (Pubmed, Medline, Cinahl, Embase and Psychinfo) up to August 2006 was done using a predetermined search strategy. Methodological quality was assessed independently by two assessors. Data extraction were carried out using a standardised data extraction form. Twenty-five articles representing data from 17 cohorts were included. Fourteen articles were rated as low quality with 11 rated as adequate quality. Meta-analysis was not undertaken due to the heterogeneity of prognostic factors, outcome measures and methods used. Results were tabulated and predefined criterion applied to rate the overall strength of evidence for associations between psychological factors and LWS. Data on 21 possible psychological risk factors were included. The majority of findings were inconclusive. Limited evidence was found to support an association between lower self-efficacy and greater post-traumatic stress with the development of LWS. No association was found between the development of LWS and personality traits, general psychological distress, wellbeing, social support, life control and psychosocial work factors. The lack of conclusive findings and poor methodological quality of the studies reviewed highlights the need for better quality research. Self-efficacy and post-traumatic distress may be associated with the development of LWS but this needs further investigation.

Course and prognostic factors for neck pain in whiplash-associated disorders (WAD): results of the Bone and Joint Decade 2000-2010 Task Force on Neck Pain and Its Associated Disorders

STUDY DESIGN

Best evidence synthesis.

OBJECTIVE

To perform a best evidence synthesis on the course and prognostic factors for neck pain and its associated disorders in Grades I-III whiplash-associated disorders (WAD).

SUMMARY OF BACKGROUND DATA

Knowledge of the course of recovery of WAD guides expectations for recovery. Identifying prognostic factors assists in planning management and intervention strategies and effective compensation policies to decrease the burden of WAD.

METHODS

The Bone and Joint Decade 2000-2010 Task Force on Neck Pain and its Associated Disorders (Neck Pain Task Force) conducted a critical review of the literature published between 1980 and 2006 to assemble the best evidence on neck pain and its associated disorders. Studies meeting criteria for scientific validity were included in a best evidence synthesis.

RESULTS

We found 226 articles related to course and prognostic factors in neck pain and its associated disorders. After a critical review, 70 (31%) were accepted on scientific merit; 47 of these studies related to course and prognostic factors in WAD. The evidence suggests that approximately 50% of those with WAD will report neck pain symptoms 1 year after their injuries. Greater initial pain, more symptoms, and greater initial disability predicted slower recovery. Few factors related to the collision itself (for example, direction of the collision, headrest type) were prognostic; however, postinjury psychological factors such as passive coping style, depressed mood, and fear of movement were prognostic for slower or less complete recovery. There is also preliminary evidence that the prevailing compensation system is prognostic for recovery in WAD.

CONCLUSION

The Neck Pain Task Force undertook a best evidence synthesis to establish a baseline of the current best evidence on the course and prognosis for WAD. Recovery of WAD seems to be multifactorial.

A systematic literature review of physical prognostic factors for the development of Late Whiplash Syndrome

STUDY DESIGN

Systematic Review.

OBJECTIVE

To summarize evidence concerning physical prognostic factors for development of Late Whiplash Syndrome (LWS).

SUMMARY OF BACKGROUND DATA

There have been 3 previous systematic reviews of prognosis of whiplash with conflicting findings. The Quebec Task Force concluded that high priority should be given to determining prognostic factors. Subsequently their review was updated by Cote et al (Spine 2001;26:E445-58) and most recently by Scholten-Peeters et al (Pain 2003;104:303-22).

METHODS

We searched electronic databases from their inception to August 2006 using a prespecified search strategy. We included prospective cohort and case control studies that studied physical prognostic factors at baseline. Two independent reviewers selected articles, extracted data, and assessed quality. Meta-analysis was not performed due to the heterogeneity between studies. Instead, levels of evidence were generated by grouping similar findings from cohorts.

RESULTS

Thirty-eight articles from 26 cohorts were reviewed. The majority of articles (25 of 38) were rated as low quality. No studies were rated as high quality. Only a minority of studies used validated prognostic measures and/or outcome measures. High initial neck pain intensity, neck pain related disability, and cold hyperalgesia all had moderate evidence for an association with the development of LWS. No factor was rated as having strong evidence.

CONCLUSION

Pain has a central role to play as a prognostic factor for the development of LWS. Other physical factors commonly used in the clinical setting showed inconclusive evidence for their influence on prognosis. There is a need for improved quality of studies with consistent use of validated measures of all categories of prognostic factors and outcome. This may then provide a clearer understanding of prognosis of Whiplash Associated Disorders and therefore facilitate effective management of this costly problem.

The role of pain coping strategies in prognosis after whiplash injury: passive coping predicts slowed recovery

Pain coping strategies are associated with pain severity, psychological distress and physical functioning in populations with persistent pain. However, there is little evidence regarding the relationship between coping styles and recovery from recent musculoskeletal injuries. We performed a large, population-based prospective cohort study of traffic injuries to assess the relationship between pain coping strategies and recovery from whiplash injuries. Subjects were initially assessed within 6 weeks of the injury, with structured telephone interview follow-up at 6 weeks, and 3, 6, 9 and 12 months post-injury. Coping was measured at 6 weeks using the Pain Management Inventory and recovery was assessed at each subsequent follow-up period, using a global self-report question. Multivariable Cox proportional hazards models showed that early use of passive coping strategies was independently associated with slower recovery. Depressive symptomatology (CES-D) was an effect modifier of this relationship. Without depressive symptomatology, those using high levels of passive coping recovered 37% slower than those using low levels of passive coping (HRR=0.63; 95% CI 0.44-0.91). However, in the presence of depressive symptomatology, those using high levels of passive coping recovered 75% more slowly than those who coped less passively (HRR=0.25; 95% CI 0.17-0.39). In other words, those with depressive symptoms but who used few passive coping strategies recovered four times more quickly than those with depressive symptoms who used high levels of passive coping. Active coping showed no independent association with recovery. These findings highlight the importance of early assessment of both coping behaviors and depressive symptomatology.