Understanding the Etiology of Chronic Pain From a Psychological Perspective

Prognostic factors for long-term improvement in pain and disability among patients with persistent low back pain

BACKGROUND

Prognostic research in low back pain (LBP) is essential for understanding and managing the condition. This study aimed to, (1) describe the proportions with mild-moderate and severe pain and disability at baseline, 1-year and 4-year follow-up, and (2) investigate prognostic factors for improvement in pain and disability over 4 years in a cohort of secondary care LBP patients.

METHODS

This was a secondary analysis of a cohort of patients with LBP aged 18-40 years recruited from a non-surgical outpatient spine clinic between March 2011 and October 2013 (n = 1037). Questionnaires were collected at baseline, 1-year, and 4-year follow-up. Disability was assessed using the Roland Morris Disability Questionnaire (RMDQ 0-100) and pain intensity using the Numeric Rating Scale (NRS 0-10). 'Mild-moderate pain' was defined as NRS < 7 and 'severe pain' as NRS ≥ 7. Likewise, 'mild-moderate disability' was defined as RMDQ < 58.3, and 'severe disability' was RMDQ ≥ 58.3. In the prognostic analysis, improvement in pain and disability over 4 years was defined as meeting both criteria: decrease of ≥ 2 on the NRS and of ≥ 20.8 on the RMDQ. Sixteen candidate prognostic factors were assessed by multivariate logistic regression.

RESULTS

Among patients with information available at all three time points (n = 241), 54%/48% had persistent mild-moderate pain/disability, while only 7%/15% had persistent severe pain/disability. Of patients included in the multivariate prognostic analysis regarding improvement over 4 years (n = 498), 32% had improved in pain and disability after 4 years. Positive associations were found for pain intensity (OR 1.34 [95%CI: 1.17-1.54]), disability (OR 1.01 [1.00-1.02]), and regular employment or studying (OR 1.67 [1.06-2.64]), and negative associations for episode duration (OR 0.99 [0.99-1.00]) and risk of persistent pain (OR 0.58 [0.38-0.88]).

CONCLUSION

Patients with persistent LBP in secondary care had mostly mild-moderate pain and disability consistently at all three time points, with few having consistently severe symptoms over 4 years. Moreover, approximately half of the included patients improved in pain and disability. We found that pain intensity, disability, episode duration, regular employment or studying, and risk of persistent pain predicted a long-term improvement. However, the limited availability of complete follow-up data may affect generalisability.

Pavlovian-to-instrumental transfer in individuals with chronic pain

Avoidance of pain has been argued to be key factor leading pain events to chronic disability. In this respect, research has focused on investigating the working mechanisms of avoidance's acquisition. Avoidance of painful stimuli has been traditionally studied using a combination of Pavlovian and Instrumental procedures. However, such approach seems to go against real-life scenarios where avoidance is commonly acquired more readily. Using a novel pain avoidance paradigm, we tested whether pain avoidance can be installed in absence of associations between a cue and pain omission, and whether such avoidance differs between pain patients and healthy controls. Participants first learned to avoid painful stimuli by pressing a grip bar. Then, they passively encountered pairings of one geometrical shape with pain and of another geometrical shape without pain. Lastly, participants encountered the geometrical shapes while being able to use the grip bar. Results showed that participants pressed the bar more vigorously when encountering the previously pain-related shape compared to the pain-unrelated shape. This effect did not seem to differ between pain patients and healthy control. Our study could inspire a new way in measuring avoidance in pain, possibly paving the way to better understanding how avoidance is installed in chronic pain.

Catastrophizing and rumination mediate the link between functional disabilities and anxiety/depression in fibromyalgia. A double-mediation model

Fibromyalgia can be considered to be a model of chronic pain resulting from dysregulation of pain processing. From a psychological point of view, it is possible to consider transdiagnostic processes that would participate in both the dysregulation of pain and associated emotions.

OBJECTIVE

The aim of this study was to test the links that exist between the tendency to Repetitive Negative Thinking (RNT) and the anxious-depressive manifestations in fibromyalgia. More specifically, we wanted to test a double mediation model where RNT would mediate the link between pain and depression/anxiety via catastrophizing.

METHOD

Eighty-two patients with fibromyalgia completed a series of questionnaires evaluating their level of depression, anxiety, disability related to pain, catastrophizing as well as various measures of Repetitive Thoughts.

RESULTS

The results showed strong correlations between RNT levels, pain, and anxious-depressive manifestations in this population. Moreover, the links between pain and depression/anxiety were mediated by catastrophizing and RNT in serial.

CONCLUSION

Results support the interest of studying RNT as a transdiagnostic process in fibromyalgia pain. Considering RNT in fibromyalgia allows a better understanding of tthe links that exist between pain and emotional disorders in this population and thus to better understand the psychopathological comorbidity of fibromyalgia.

Exploring fascial properties in patients with depression and chronic neck pain: An observational study

BACKGROUND

Depressive disorder and chronic pain are prevalent conditions that often co-occur. The myofascial fascial continuum has been hypothesized to contribute to both conditions. However, limited research exists on the specific association between fascial properties and chronic pain and depression.

OBJECTIVE

This study aims to investigate the properties of the deep fascia of the M. trapezius and their relationship with depression, chronic neck pain, and cervical spine mobility.

METHOD

This study compared fascial properties between two groups: individuals with depression and chronic neck pain, and healthy individuals. Fascial thickness, elasticity, and stiffness were measured as primary outcomes using standardized techniques such as ultrasound imaging and compliance meter. Statistical analyses were conducted to identify potential differences and correlations in fascial properties between the two groups.

RESULT

Significant differences emerge in stiffness, tone, and fascia thickness in the deep fascia, alongside identified correlations between depression, chronic pain, and these variables.

CONCLUSION

The study highlights the impact of depression and chronic pain on fascial properties, emphasizing the need for further research in this domain to unravel the intricate connections and potential implications for treatment strategies.

Musculoskeletal pain among medical residents: role of workplace safety climate and sexual harassment

BACKGROUND

Workplace factors are important predictors of occurrence of musculoskeletal pain among different occupational populations. In healthcare, a psychologically unsafe work environment can negatively affect the emotional, physical and psychological well-being of physicians. This study aimed to examine the relationship between workplace violence, sexual harassment and musculoskeletal pain among Egyptian physicians in their years of residency.

METHODS

We distributed an online self-administered questionnaire to 101 residents working in various healthcare sectors in Egypt. It included sections on demographic data, working conditions, widespread pain index (WPI), pain interference short-form, workplace violence and harassment questionnaire, psychosocial safety climate questionnaire (PSC) and sexual harassment climate questionnaire.

RESULTS

All residents had at least one painful site on the WPI (range 1-11). The mean WPI was 3.5 ± 2.4, and 39.6% satisfied the criteria of having widespread pain by having at least 4 pain sites. Widespread pain index showed a weak statistically significant negative correlation with workplace PSC score (rho = - 0.272, p = 0.006), and a statistically significant weak positive correlation with the calculated total abuse index (rho = 0.305, p = 0.002). Workplace violence and abuse, as measured by a calculated abuse index was the only significant predictors of widespread pain among residents.

CONCLUSION

WPV was found to be a predictor of musculoskeletal pain among medical residents. Healthcare organizations need to address WPV by employing preventive strategies to minimize its hazardous effects and ensure a safe working environment for physicians.

Approaches to osteoarthritis: a qualitative study among physical therapists in Maharashtra, India

BACKGROUND AND OBJECTIVE

Osteoarthritis (OA) is a major and growing problem in India. Better knowledge dissemination and implementation of evidence-based practice in Indian physical therapy require a better understanding of approaches to OA (i.e. perceptions of the condition and its management by Indian physical therapists (PTs)) which was the aim of our study.

DESIGN AND METHOD

We used qualitative content analysis to analyze semi-structured interviews with 19 PTs from Maharashtra state, purposefully selected to represent both sexes, different ages and different educational and professional backgrounds.

FINDINGS

We identified a main overarching theme of meaning, OA as a degenerative and irreversible condition with the four descriptive themes Assessment, Standardized treatment protocol, Leadership and Patient compliance as PTs' approaches to OA. The descriptive themes indicate that much focus seems to be on pain, physical impairments and biomechanics, with initial treatments being mainly passive. Communication appears to be mainly unidirectional with the PTs instructing the patients, who are expected to comply with PTs instructions. Clinical practice guidelines (CPGs) were not mentioned.

CONCLUSIONS

Our findings can inform the design of awareness campaigns on evidence-based OA management and increase the understanding of the educational needs of students and PTs in non-Western countries. It is important to recognize that CPGs are mainly based on studies carried out in Western countries and that there are context-specific barriers to implementation in other parts of the world that have large populations.

The impact of the social context on the development of secondary hyperalgesia: an experimental study

ABSTRACT

Social support has been shown to reduce pain ratings and physiological responses to acute pain stimuli. Furthermore, this relationship is moderated by adult attachment styles. However, these effects have not been characterized in experimentally induced symptoms of chronic pain, such as secondary hyperalgesia (SH) which is characterized by an increased sensitivity of the skin surrounding an injury. We aimed to examine whether social support by handholding from a romantic partner can attenuate the development of experimentally induced SH. Thirty-seven women, along with their partners, participated in 2 experimental sessions 1 week apart. In both sessions, SH was induced using an electrical stimulation protocol. In the support condition, the partner was seated across from the participant holding the participant's hand during the electrical stimulation, whereas in the alone condition, the participant went through the stimulation alone. Heart rate variability was measured for both the participant as well as the partner before, during, and after the stimulation. We found that the width of the area of hyperalgesia was significantly smaller in the support condition. Attachment styles did not moderate this effect of social support on the area width. Increasing attachment avoidance was associated with both a smaller width of hyperalgesia and a smaller increase in the sensitivity on the stimulated arm. For the first time, we show that social support can attenuate the development of secondary hyperalgesia and that attachment avoidance may be associated with an attenuated development of secondary hyperalgesia.

Recommended approaches to assessing and managing physiotherapy clients experiencing psychological distress: a systematic mapping review

BACKGROUND

Some physiotherapists find assessing and managing clients experiencing psychological distress challenging and are uncertain regarding the boundaries of the profession's scope.

OBJECTIVE

To map the approaches recommended for physiotherapists in scholarly literature, with respect to the assessment and management of clients experiencing psychological distress.

METHODS

A systematic mapping review was conducted. CINAHL, APA PsycINFO, Embase, and Medline ALL databases were systematically searched for secondary and tertiary literature relevant to the research objective. Recommended approaches were extracted from each article and analyzed descriptively and thematically.

RESULTS

3884 records were identified with 40 articles meeting the inclusion/exclusion criteria. Most recommendations related to identifying, assessing, and managing pain-related distress, with depression screening and referral also receiving some attention. Three approaches to detecting and assessing psychological distress were identified: 1) brief depression screen; 2) integrated suicide/nonsuicidal self-harm and depression screen; and 3) multidimensional screen and health-related distress assessment. Regarding the management of psychological distress the main approaches identified were: 1) education and reassurance; 2) cognitive-behavioral approaches; 3) mindfulness; and 4) case management.

CONCLUSION

While assessment and management of health-related distress by physiotherapists is commonly recommended, further guidance is needed to differentiate various forms of distress.

Differing Effects of Nociception and Pain Memory on Isometric Muscle Strength in Participants With and Without a History of Injury: A Quasi-Experimental Study

OBJECTIVE

The goals of this study are to establish whether mechanical pressure pain, short-term memory recall of a painful stimulus, or long-term memory of a previous painful lower limb injury alters isometric muscle strength and whether there was a difference in responses between participants with and without a previous history of injury.

DESIGN

Fifty-nine pain-free participants (29 with previous injury and 30 without) participated in this study. Tibialis anterior isometric muscle strength was compared pre- and post-noxious mechanical stimulus with instructions to recall pain (short- and long-term).

RESULTS

Short- and long-term pain recall produced a significant reduction in muscle strength (short-term: F (1,57) = 160.472, P < 0.001; long-term: F (1,57) = 128.899, P < 0.001). A greater decrease was experienced with short- and long-term pain memory than exposure to mechanical pain (mechanical pain: -14.8% or -32.98 kg, 95% confidence interval [CI], -41.57 to -24.19; short-term: -24.1% or -52.70 kg, 95% CI = -60.98 to -44.34; long-term: -20.3% or -44.63 kg, 95% CI = -52.77 to -36.95). There was no significant difference in responses associated with an injury history.

CONCLUSIONS

Findings suggest that recalled pain memory can impact motor responses and calls attention to the role of past injury history in the rehabilitation process.

Internet-Delivered Dialectical Behavioral Therapy Skills Training for Chronic Pain: Protocol for a Randomized Controlled Trial

BACKGROUND

Emotion dysregulation is key to the development and maintenance of chronic pain, feeding into a cycle of worsening pain and disability. Dialectical behavioral therapy (DBT), an evidence-based treatment for complex transdiagnostic conditions presenting with high emotion dysregulation, may be beneficial to manage and mitigate the emotional and sensory aspects of chronic pain. Increasingly, DBT skills training as a key component of standard DBT is being delivered as a stand-alone intervention without concurrent therapy to help develop skills for effective emotion regulation. A previous repeated-measure single-case trial investigating a novel technologically driven DBT skills training, internet-delivered DBT skills training for chronic pain (iDBT-Pain), revealed promising findings to improve both emotion dysregulation and pain intensity.

OBJECTIVE

This randomized controlled trial aims to examine the efficacy of iDBT-Pain in comparison with treatment as usual to reduce emotion dysregulation (primary outcome) for individuals with chronic pain after 9 weeks and at the 21-week follow-up. The secondary outcomes include pain intensity, pain interference, anxiety symptoms, depressive symptoms, perceived stress, posttraumatic stress, harm avoidance, social cognition, sleep quality, life satisfaction, and well-being. The trial also examines the acceptability of the iDBT-Pain intervention for future development and testing.

METHODS

A total of 48 people with chronic pain will be randomly assigned to 1 of 2 conditions: treatment and treatment as usual. Participants in the treatment condition will receive iDBT-Pain, consisting of 6 live web-based group sessions led by a DBT skills trainer and supervised by a registered psychologist and the iDBT-Pain app. Participants in the treatment-as-usual condition will not receive iDBT-Pain but will still access their usual medication and health interventions. We predict that iDBT-Pain will improve the primary outcome of emotion dysregulation and the secondary outcomes of pain intensity, pain interference, anxiety symptoms, depressive symptoms, perceived stress, harm avoidance, social cognition, sleep quality, life satisfaction, and well-being. A linear mixed model with random effects of individuals will be conducted to investigate the differences between the baseline, 9-week (primary end point), and 21-week (follow-up) assessments as a function of experimental condition.

RESULTS

Recruitment started in February 2023, and the clinical trial started in March 2023. Data collection for the final assessment is planned to be completed by July 2024.

CONCLUSIONS

If our hypothesis is confirmed, our findings will contribute to the evidence for the efficacy and acceptability of a viable intervention that may be used by health care professionals for people with chronic pain. The results will add to the chronic pain literature to inform about the potential benefits of DBT skills training for chronic pain and will contribute evidence about technologically driven interventions.

TRIAL REGISTRATION

Australian New Zealand Clinical Trials Registry ACTRN12622000113752; https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=383208&isReview=true.

INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID)

PRR1-10.2196/41890.

Effectiveness of a Primary Care Multidisciplinary Treatment for Patients with Chronic Pain Compared with Treatment as Usual

To manage chronic pain, multidisciplinary interventions have been increasingly deployed, mostly in secondary or tertiary care settings. Evidence on the effectiveness of multidisciplinary intervention within primary care is scarce. This study examined the effectiveness of a primary care multidisciplinary treatment for chronic pain compared with treatment as usual (TAU). The intervention consisted of pain neuroscience education and treatment by a GP, psychologist, and physiotherapist. Both groups filled out patient-reported outcome measures at baseline, 6 months, and 12 months. The results indicated there were no statistically significant differences for the primary outcomes of pain intensity, number of pain sites, and health-related quality of life (HR-QoL). There was a statistically significant difference in the secondary outcome perceived health change in favor of the intervention group. None of the other differences were statistically significant. A post-hoc analysis showed that there were statistically significant effects on patients' illness perceptions in favor of the intervention group. Based on the results, the findings do not support effectiveness of a low intensity outpatient multidisciplinary primary care treatment to treat chronic pain compared with TAU. However, as a result of several study limitations, it is considered unwarranted to conclude that multidisciplinary treatment in primary care is not valuable at all.

A psychometric evaluation of the Italian short version of the Fear of Pain Questionnaire-III: Psychometric properties, measurement invariance across gender, convergent, and discriminant validity

Introduction

The Fear of Pain Questionnaire-III (FPQ-III) is a self-assessment instrument developed specifically to measure fear based on various pain stimuli converging on three factors: severe pain, medical pain, and minor pain. It actually remains the most studied and internationally used tool even in its short versions. The aim of this work was to propose a new validation study oriented to confirm the good psychometric properties of a short model of the FPQ-III for the Italian context.

Methods

A large sample of participants was recruited (n  = 1,064) and Exploratory Factor Analysis (EFA) as well as Confirmatory Factor Analysis (CFA) were performed. Measurement invariance of the FPQ-III across gender was also evaluated. In order to examine convergent validity, a further convenient sample (n  = 292) was used and variables related to the individual's pain experience, locus of control and coping orientations were assessed. A final discriminant assessment using experimental manipulation through fear eliciting videos was performed.

Results

The three factors structure of the 13-item version of the questionnaire was confirmed (χ² = 148.092, CFI = 0.971, TLI = 0.962, RMSEA = 0.046, RMSEA 90% CI = 0.037-0.056) as well as the measurement invariance across gender. Item internal reliability was satisfactory. The results provided evidence of the good predictive validity of the FPQ-III and the discriminant assessment demonstrated that the instrument is suitable in detecting changes in fear of pain induced by specific situational conditions.

Discussion

The scale in this short version is suitable for quickly and efficiently gathering information about the perceived intensity of such anticipatory fears that might affect even the healthy person dysfunctionally.

Structural Model Based on Genetic Algorithm for Inhibiting Fatty Acid Amide Hydrolase

The fatty acid amide hydrolase (FAAH) is an enzyme responsible for the degradation of anandamide, an endocannabinoid. Pharmacologically blocking this target can lead to anxiolytic effects; therefore, new inhibitors can improve therapy in this field. In order to speed up the process of drug discovery, various in silico methods can be used, such as molecular docking, quantitative structure–activity relationship models (QSAR), and artificial intelligence (AI) classification algorithms. Besides architecture, one important factor for an AI model with high accuracy is the dataset quality. This issue can be solved by a genetic algorithm that can select optimal features for the prediction. The objective of the current study is to use this feature selection method in order to identify the most relevant molecular descriptors that can be used as independent variables, thus improving the efficacy of AI algorithms that can predict FAAH inhibitors. The model that used features chosen by the genetic algorithm had better accuracy than the model that used all molecular descriptors generated by the CDK descriptor calculator 1.4.6 software. Hence, carefully selecting the input data used by AI classification algorithms by using a GA is a promising strategy in drug development.

Chronic Pain, Insomnia and their Mutual Maintenance: A Call for Cognitive Bias Research

Chronic pain and insomnia are highly comorbid: Approximately 50% of those with chronic pain experience insomnia or clinically significant sleep disturbances, and 50% of those with insomnia experience chronic pain. Further, these conditions can be extremely disabling, particularly when they co-occur. There is increasing recognition of the need to tackle both chronic pain and insomnia together, as evidenced by growing empirical research in this area. Cognitive processing biases have been independently implicated in both chronic pain and in insomnia. Given their trans-diagnostic status, cognitive biases may therefore have a role in explaining the co-occurrence and mutual maintenance of these conditions. These biases also represent novel, potentially modifiable targets for treatment. However, the role of cognitive biases has not been adequately explored in comorbid chronic pain and insomnia. Here, we describe the state of cognitive bias research in chronic pain and insomnia, considering evidence for the roles of attentional bias, interpretation bias, expectancy bias, and memory bias. In reviewing the literature, it is apparent that similar cognitive biases operate in insomnia and chronic pain, with preliminary, albeit sparse, evidence of pain-related cognitive biases influencing sleep-related outcomes. On the basis of current findings and separate theoretical models, we present a novel, testable cognitive model of comorbid chronic pain and insomnia, to guide future research in this area. Key recommendations for the future of this relatively new field are provided. PERSPECTIVE: Chronic pain and insomnia are highly co-morbid, suggesting an overlap in causal mechanisms. Empirical research, although sparse, suggests that cognitive biases may play a role in their development and mutual maintenance. Our novel cognitive model generates research avenues of clinical importance for treating co-morbid chronic pain and insomnia.

Assessment of Pain-Related Fear in Indigenous Australian Populations Using the Fear of Pain Questionnaire-9 (FPQ-9)

In this study, we examined the psychometric properties of the Fear of Pain Questionnaire (FPQ-9) in Indigenous Australian people. FPQ-9, a shorter version of the original Fear of Pain Questionnaire-III, was developed to support the demand for more concise scales with faster administration time in the clinical and research setting. The psychometric properties of FPQ-9 in Indigenous Australian participants (n = 735) were evaluated with network psychometrics, such as dimensionality, model fit, internal consistency and reliability, measurement invariance, and criterion validity. Our findings indicated that the original FPQ-9 three-factor structure had a poor fit and did not adequately capture pain-related fear in Indigenous Australian people. On removal of two cross-loading items, an adapted version Indigenous Australian Fear of Pain Questionnaire-7 (IA-FPQ-7) displayed good fit and construct validity and reliability for assessing fear of pain in a sample of Indigenous Australian people. The IA-FPQ-7 scale could be used to better understand the role and impact of fear of pain in Indigenous Australian people living with chronic pain. This could allow for more tailored and timely interventions for managing pain in Indigenous Australian communities.

Building evidence to reduce inequities in management of pain for Indigenous Australian people

OBJECTIVES

Pain is a universal experience which each person encounters differently, guided by the psycho-socio-environmental context in which it occurs. Although more research is underway yet very little is known about pain from Indigenous Australian perspective. Therefore, this study aims to examine, experience of pain and coping, and utility of three measures: Brief Pain Inventory short form, McGill Pain Questionnaire and Numerical rating scale, from Indigenous South Australian people perspective.

METHODS

Thirteen in-person interviews were conducted which lasted around 90 min and were audio-recorded. The transcripts were coded and analysed thematically with NVivo.

RESULTS

Six key themes were identified; 1: Spiritual conceptualisation of pain; 2: Frequent experience of trauma and injury; 3: Influence of familial history of pain; 4: Acceptance of pain as normal; 5: Outlook on biomedical management of pain; 6: Preference for non-pharmacological management of pain. Also, the three measures did not fully capture pain from an Indigenous Australian perspective which is more deeply rooted in a bio-psycho-socio-spiritual context which is cardinal to conceptualization of health and wellbeing in Indigenous Australian communities.

CONCLUSIONS

Findings highlight some commonalities as well as unique differences between Indigenous experiences of pain as compared to non-Indigenous. Factors such as spiritual connection with pain, grief and loss, history of trauma and injury, fear of addiction to pain medication and exposure to pain from early childhood had important implications for how participants viewed pain.

Which Functional Outcomes Can be Measured in Low Back Pain Trials and Therapies?: A Prospective 2-Year Factor-, Cluster-, and Reliability-Multicenter Analysis on 42 Variables in 1049 Individuals

STUDY DESIGN

Prospective 2-year factor-, cluster-, and reliability-multicenter analysis.

OBJECTIVE

To provide evidence on the uniqueness and usefulness of a set of potential relevant functional outcomes.

SUMMARY OF BACKGROUND DATA

A very high number of functional outcomes that can be utilized as variables in low back pain (LBP) trials exists.

METHODS

Participants (n = 1049) with and without current LBP were included. At 7 visits (baseline, 4 wk, 3 mo, 6 mo, 9 mo, 1 yr, and 2 yr), 42 different functional outcomes were assessed. Two exploratory factor analyses (for baseline-values and for changes scores to 3 mo post-baseline) were calculated (maximum likelihood extraction, varimax factor rotation). The strongest factor-loading outcomes were selected for the following hierarchical cluster analyses (average linkage, Euclidean distance measure). For each cluster, time point, and outcome, reliability analyses were subsequently calculated using intraclass correlation coefficients, standard error of measurements and coefficients of variation.

RESULTS

The factor analysis for the cross-sectional values revealed 9 factors with a cumulative variance explanation of 61.7% and 13 unique ones. The change-score factor analysis revealed nine factors with a total variance explanation of 61.8%, seven outcomes were unique. Ten outcomes were important for both cross-sectional and change-score analyses, 11 were most valuable for cross-sectional and four for the change scores. Patients with pain grades 1 to 3 show comparable patterns (cluster 2). Grade 0 (cluster 1) and grade 4 (cluster 3) are unique and cannot be cumulated with other grades. Most biomechanical outcomes were highly reliable and display low measurement errors.

CONCLUSION

We found 25 potentially meaningful functional outcomes in the context of objective functional measurements (such as trunk range of motion, dynamic and static balance, strength, and muscle fatigue resistance) and body characteristics. The present framework may help to select appropriate functional outcomes and rate effects beyond the known core set of outcomes.Level of Evidence: 1.

Effects of behavioural exercise therapy on the effectiveness of multidisciplinary rehabilitation for chronic non-specific low back pain: a randomised controlled trial

Background

The long-term effects of behavioural medical rehabilitation (BMR), as a type of multidisciplinary rehabilitation, in the treatment of chronic non-specific low back pain (CLBP) have been shown. However, the specific effects of behavioural exercise therapy (BET) compared to standard exercise therapy (SET) within BMR are not well understood. The aim of the study was to assess the effectiveness of BMR + BET compared to BMR + SET in individuals with CLBP in a two-armed, pre-registered, multicentre, parallel, randomised controlled trial (RCT).

Methods

A total of 351 adults with CLBP in two rehabilitation centres were online randomised based on an ‘urn randomisation’ algorithm to either BMR + SET (n = 175) or BMR + BET (n = 176). Participants in both study groups were non-blinded and received BMR, consisting of an multidisciplinary admission, a psychosocial assessment, multidisciplinary case management, psychological treatment, health education and social counselling. The intervention group (BMR + BET) received a manualised, biopsychosocial BET within BMR. The aim of BET was to develop self-management strategies in coping with CLBP. The control group (BMR + SET) received biomedical SET within BMR with the aim to improve mainly physical fitness. Therapists in both study groups were not blinded. The BMR lasted on average 27 days, and both exercise programmes had a mean duration of 26 h. The primary outcome was functional ability at 12 months. Secondary outcomes were e.g. pain, avoidance-endurance, pain management and physical activity. The analysis was by intention-to-treat, blinded to the study group, and used a linear mixed model.

Results

There were no between-group differences observed in function at the end of the BMR (mean difference, 0.08; 95% CI − 2.82 to 2.99; p = 0.955), at 6 months (mean difference, − 1.80; 95% CI; − 5.57 to 1.97; p = 0.349) and at 12 months (mean difference, − 1.33; 95% CI − 5.57 to 2.92; p = 0.540). Both study groups improved in the primary outcome and most secondary outcomes at 12 months with small to medium effect sizes.

Conclusion

BMR + BET was not more effective in improving function and other secondary outcomes in individuals with CLBP compared to BMR + SET.

Trial registration

Current controlled trials NCT01666639, 16/08/2012.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12891-021-04353-y.

Cluster analysis of Canadian Armed Forces veterans living with chronic pain: Life After Service Studies 2016

Objective: This study explored the heterogeneity of Canadian Armed Forces veterans living with chronic pain to inform service needs planning and research using cluster analysis. Design: We used a national cross-sectional Statistics Canada population survey. Participants: Participants included 2754 Canadian Armed Forces (CAF) Regular Force veterans released from service between 1998 and 2015 and surveyed in 2016. Methods: We used cluster analysis of veterans with chronic pain based on pain severity, mental health, and activity limitation characteristics. We compared clusters for sociodemographic, health, and service utilization characteristics. Results: Of 2754 veterans, 1126 (41%) reported chronic pain. Veterans in cluster I (47%) rarely had severe pain (2%) or severe mental health problems (8%), and none had severe activity limitations. Veterans in cluster II (26%) more often than veterans in cluster I but less often than veterans in cluster III endorsed severe pain (27%) and severe mental health problems (22%) and were most likely to report severe activity limitation (91%). Veterans in cluster III (27%) were most likely to report severe pain (36%) and severe mental health problems (96%), and a majority reported severe activity limitations (72%). There was evidence of considerable heterogeneity among individuals in terms of socioeconomic characteristics, pain characteristics, mental and physical health status, activity limitations, social integration, and service utilization indicators. Conclusions: About half of Canadian veterans living with chronic pain infrequently endorse severe pain or serious mental health issues without severe activity limitations. The other half had more complex characteristics. The heterogeneity of CAF veterans with chronic pain emphasizes the need for support systems that can address variability of needs.

Description of content, structure and theoretical model of a group-based pain management programme in the treatment of patients with persistent non-specific low back pain and psychological risk factors in a secondary sector setting

OBJECTIVE

To present the theoretical foundation and methodological considerations for a group-based pain management programme for patients with persistent non-specific low back pain and psychosocial risk factors.

METHOD

The Template for Intervention Description and Replication (TIDieR) checklist was used as a framework for describing the content, structure and context of the program. The theoretical rationale underlying the pain management programme was described using the first three steps of the Intervention Mapping framework. The Fear-avoidance model and the Self-efficacy Theory were identified as the two main theories. These were used to establish specific factors addressed by the pain management programme as well as expected outcomes.

INTERVENTION DESCRIPTION

A multidisciplinary, group-based programme using a cognitive-behavioural approach was developed. The programme consisting of six sessions of two hours duration, took place at a spine clinic at a regional hospital in Denmark. Psychoeducation and cognitive restructuring were specific strategies hypothesised to induce changes in outcome measures. The outcomes expected to change as a result of the intervention were disability, quality of life, sick leave and physical activity. A pilot study was performed, subsequent adjustments made and the final content and educational materials completed by January 2017.

CONCLUSION

The theoretical foundation and underlying evidence for the hypothesised change mechanisms in the use of a cognitive-behavioural approach was presented. A theoretically sound and practically feasible intervention has been developed and its effectiveness is being determined in a randomised controlled trial, including 130 low back pain patients, which is currently underway.

Using Visual Feedback Manipulation in Virtual Reality to Influence Pain-Free Range of Motion in People with Nonspecific Neck Pain

Background

Based on associative learning theories it is hypothesized that pain might be a conditioned response. In people with musculoskeletal pain, the occurrence of movement‐induced pain might be a protective response, influenced by visual cues suggesting that the person is approaching a painful position. This study aimed to determine (1) whether the pain‐free range of motion (ROM) increased and decreased when visual feedback understated or overstated true rotation in people with neck pain and (2) whether this effect was more pronounced if pain was chronic.

Method

People with subacute and chronic nonspecific neck pain wore a VR‐headset and rotated their head to the left and right until the onset of pain. Visual feedback about the amount of movement was either equal, 20% less, or 20% greater than their actual rotation. Maximal pain‐free ROM was measured using the VR‐headset sensors. Data were analyzed using a mixed‐design ANOVA.

Results

There was no effect of visual feedback manipulation on pain‐free ROM (P = 0.13) and no interaction effect between the visual feedback condition and duration of pain (P = 0.86).

Discussion

The inability to influence pain‐free ROM by manipulating visual feedback in people with subacute or chronic neck pain does not support associative learning theories for the perception of neck pain.

How and how fast does pain lead to disability? A multilevel mediation analysis on structural, temporal and biopsychosocial pathways in patients with chronic nonspecific low back pain

Self-efficacy, fear of movement, and depression may mediate the sequential pathway of how pain leads to disability in nonspecific low back pain. Participants with chronic (>13 weeks) non-specific low back pain were included. They were prospectively monitored for eight consecutive weeks. Each second day, all participants filled in a survey (30 surveys pp). Questionnaires on current back pain intensity (NRS) and disability (PDI) were completed in each survey. One out of three standardized questionnaires on self-efficacy (SES), fear of movement, kinesiophobia (TSK), or depression (PHQ-9) were randomly completed each time. Multilevel mediation analyses on the within-(temporal changes) and between-patients total and indirect (mediated by SES; TSK and PHQ-9) effect of pain on disability were conducted for three temporal associations: No time delay, Simple temporal delay, and Double delay. In total, 280 questionnaires were filled in by 10 participants (m = 4; 34.4 ± 12.2 years). A moderate to strong effect of pain on disability in the no delay-model for the within-patients (0.436), and (all models) in the between-patients (0.595-0.627) models was found. The way how pain affects kinesiophobia was influenced by the time passed. Kinesiophobia itself predicted disability. Further, depression was affected by (within and between) pain intensity (NRS). In the simple delay effects mediation, depression affects disability (within) and is itself affected by the pain (between). No indirect effect of self-efficacy, fear of movement and depression in the pain-disability relationship was found. Understanding underlying mechanisms of how and when pain leads to disability might help to find accurate measures in therapy setting.

The effect of in-session exposure in Fear-Avoidance treatment of chronic low back pain: A randomized controlled trial

BACKGROUND

Treatment based on the Fear-Avoidance (FA) model has been found to be effective with chronic low back pain (CLBP), and in-vivo exposure of fear evoking movements is proposed as a key change mechanism. Exposure tasks may be conducted in the session (in-session exposure; ISE), in other real-life situations (between sessions exposure) as part of homework assignments, or both. Utilising a randomized, controlled dismantling study design, the aim of this study was to examine the unique effects of ISE in FA-treatment of CLBP.

METHODS

Patients (N = 90) with CLBP as primary medical complaints were randomized to receive six sessions of either (a) FA-treatment with ISE (FA-ISE) or (b) FA-treatment without ISE (FA), allowing for between sessions exposure in both treatment groups. Patients were assessed with a large battery of outcome measures at four time-points (pre-treatment, post-treatment, after a booster-session and at 1-year follow-up) including pain intensity, pain catastrophising, self-efficacy, physical performance and quality of life.

RESULTS

Both treatment groups (FA-ISE, FA) demonstrated statistically significant improvements on primary and most secondary outcomes, with mostly non-significant between-group differences.

CONCLUSIONS

No added benefit was found for the inclusion of ISE of feared movements in FA-treatment for CLBP, delivered in a group format to participants with moderately elevated levels of fear-avoidance beliefs. Clinical trials: NCT01158339.

SIGNIFICANCE

This study adds to the existing research literature demonstrating FA-treatment to be effective with CLBP, but further experimental studies are needed in order to examine under what circumstances ISE of feared movements may add to positive treatment outcomes.

Use of cannabidiol (CBD) for the treatment of chronic pain

Chronic pain can be recurrent or constant pain that lasts for longer than 3 months and can result in disability, suffering, and a physical disturbance. Related to the complex nature of chronic pain, treatments have a pharmacological and non-pharmacological approach. Due to the opioid epidemic, alternative therapies have been introduced, and components of the plant Cannabis Sativa, Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) have gained recent interest as a choice of treatment. The exact mechanism for CBD is currently unknown, but unlike the CBD's psychoactive counterpart, THC, the side effects of CBD itself have been shown to be overall much more benign. The current pharmaceutical products for the treatment of chronic pain are known as nabiximols, and they contain a ratio of THC combined with CBD, which has been promising. This review focuses on the treatment efficacy of CBD, THC: CBD-based treatments for chronic pain and adverse events with each.

A classification-based approach to low back pain in primary care - protocol for a benchmarking controlled trial

Background

Guidelines recommend a biopsychosocial framework for low back pain (LBP) management and the avoidance of inappropriate imaging. In clinical practice, care strategies are often inconsistent with evidence and guidelines, even though LBP is the most common disabling health condition worldwide. Unhelpful beliefs, attitudes and inappropriate imaging are common. LBP is understood to be a complex biopsychosocial phenomenon with many known multidimensional risk factors (symptom- and lifestyle-related, psychological and social) for persistent or prolonged disability, which should be identified and addressed by treatment. The STarT Back Tool (SBT) was developed for early identification of individual risk factors of LBP to enable targeted care. Stratified care according SBT has been shown to improve the effectiveness of care in a primary care setting. A biopsychosocially-oriented patient education booklet, which includes imaging guidelines and information, is one possible way to increase patients’ understanding of LBP and to reduce inappropriate imaging. Premeditated pathways, education of professionals, written material, and electronic patient registry support in health care organizations could help implement evidence-based care.

Methods

We will use a Benchmarking Controlled Trial (BCT) design in our study. We will prospectively collect data from three health care regions before and after the implementation of a classification-based approach to LBP in primary care. The primary outcome will be change in PROMIS (Patient-Reported Outcomes Measurement Information System) (short form 20a) over 12-month follow-up.

Discussion

The implementation of a classification-based biopsychosocial approach can potentially improve the care of LBP patients, reduce inappropriate imaging without increasing health-care costs, and decrease indirect costs by reducing work disability. Using the BCT we will be able to evaluate the effectiveness of the improvement strategy for the entire care pathway.

Trial registration

ISRCTN,ISRCTN13273552, retrospectively registered 13/05/2019.

The prevalence of fear avoidance and pain catastrophising amongst patients with chronic neck pain

Background

Cognitive factors impact chronic pain, but the prevalence of fear avoidance (FA) and pain catastrophising (PC) in individuals suffering from chronic neck pain (CNP) has not been investigated in South Africa.

Objectives

To determine the prevalence of FA and PC in patients with CNP at private physiotherapy practices in Johannesburg.

Method

The Tampa Scale for Kinesiophobia-11 (TSK-11) (α = 0.80) and Pain Catastrophising Scale (α = 0.87) self-report questionnaires were used in a cross-sectional study to determine the prevalence of FA and PC, respectively. Descriptive statistics and correlations using Pearson’s or Spearman’s coefficient were conducted between demographic variables and FA and PC. Non-parametric data were tested using the Wilcoxon rank-sum or Kruskal–Wallis test. Cohen’s d-value or r-value measured strength of associations.

Results

A sample of 106 CNP patients with a mean age of 48.7 years (± 14.8) from 25 randomly selected private practices participated in the study. Of the participants, 81% were women (n = 86). Fear avoidance and PC had a prevalence of 25.5% (n = 27) and 15.1% (n = 16), respectively. A positive correlation was found between FA-11-Total and PC-Total (r = 0.684; p = 0.0001) and between FA (TSK-11-Total and TSK-SF (somatic focus)) and PC and its subscales (r ≥ 0.602; p = 0.0001). Participants with a secondary education (26.0 ± 3.4) showed a higher FA than those with tertiary education (21.9 ± 1.5). Effect size was moderate (Cohen’s d = 0.60). Pain intensity correlated positively with both FA (Pearson’s correlation: r = 0.33; p = 0.001) and PC (Spearman’s correlation; r = 0.39; p = 0.0001).

Conclusion

FA and PC affect a number of patients with CNP. A lower level of education was associated with FA and a higher pain intensity was associated with higher FA and PC.

Clinical implications

Identifying FA and PC in patients with CNP is important to facilitate holistic management.

Is rotator cuff related shoulder pain a multidimensional disorder? An exploratory study

Background and aims

Rotator cuff related shoulder pain has been associated with factors from multiple dimensions such as strength changes, psychosocial measures, comorbidities and level of education. However, to date little research has been undertaken to evaluate which factors explain the greatest variance in pain and disability levels in people with rotator cuff related shoulder pain. The objective of this study was therefore to evaluate which multidimensional examination findings were associated with higher pain and disability in a primary care cohort with rotator cuff related shoulder pain.

Methods

This was an exploratory cross-sectional cohort study. Sixty-seven participants with rotator cuff related shoulder pain were assessed for: pain intensity, disability; demographic, psychological, social and lifestyle characteristics, and isometric strength of shoulder internal and external rotator muscles. Univariable associations between pain intensity/disability and each variable were assessed using linear regression. Variables with univariable associations (p < 0.1) were entered into backwards stepwise multivariable regression models.

Results

The multivariable model for pain intensity included sleep and perceived persistence and explained 46.5% of the variance (37.6% uniquely by sleep, 5.4% uniquely by perceived persistence). The multivariable model for disability included sleep and sex and explained 26.8% of the variance (4.5% shared by predictors, 16.4% uniquely by sleep, 5.9% uniquely by sex).

Conclusions

Rotator cuff-related shoulder pain and disability are associated with sleep disturbance, perceived symptom persistence and sex. Rotator cuff related shoulder pain may be considered a multidimensional disorder.

Implications

Clinicians need to evaluate sleep and perceived symptom persistence in people with rotator cuff related shoulder pain. Future research may examine whether management strategies for RCRSP directed towards these factors afford improved treatment outcomes.

Psychological Subgrouping to Assess the Risk for the Development or Maintenance of Chronic Musculoskeletal Pain: Is This the Way Forward?

BACKGROUND

Because musculoskeletal pain problems are so prevalent, new methods of evaluating and treating patients are needed to increase effectiveness. Subgrouping is a method wherein patients are classified into defined groups on the basis of psychosocial factors with the expectation of more specific and tailored treatments can be prescribed for them. For those seeking care for a new episode, the risk of developing chronic pain-related disability is assessed, whereas, for those with existing pain, the risk for the maintenance of the chronic pain problem is evaluated.

AIM

The purpose of this narrative review is to examine how patients are classified into subgroups with regard to methods of evaluation and to ascertain whether subgrouping actually facilitates treatment.

RESULTS

For the development of disability, screening tools, for example, the Örebro Musculoskeletal Pain Screening Questionnaire, accurately stratify patients into groups (eg, high, medium, low risk) that predict future pain-related work disability. In addition, several studies show that treatments that directly key in on risk groups enjoy enhanced outcomes compared with treatment as usual. For the maintenance of chronic musculoskeletal pain problems, there are several instruments that classify patients into specific groups or profiles, for example, on the basis of the avoidance and endurance model or the International Classification of Functioning, Disability and Health (ICF) assessment. Although some evidence shows that these classifications are related to treatment outcome, we found no study that directly tested a system for providing treatment matched to the subgrouping for maintenance.

CONCLUSIONS

We conclude that it is possible to reliably subgroup patients with musculoskeletal problems. Likewise, treatments that address the risk factors in the screening procedure may enhance outcomes compared with treatment as usual. More work is needed, however, to better understand the mechanism, so that assessment methods can be improved, and treatment specific to subgroups can be developed and evaluated.

Persistence of pain in humans and other mammals

Evolutionary models of chronic pain are relatively undeveloped, but mainly concern dysregulation of an efficient acute defence, or false alarm. Here, a third possibility, mismatch with the modern environment, is examined. In ancestral human and free-living animal environments, survival needs urge a return to activity during recovery, despite pain, but modern environments allow humans and domesticated animals prolonged inactivity after injury. This review uses the research literature to compare humans and other mammals, who share pain neurophysiology, on risk factors for pain persistence, behaviours associated with pain, and responses of conspecifics to behaviours. The mammal populations studied are mainly laboratory rodents in pain research, and farm and companion animals in veterinary research, with observations of captive and free-living primates. Beyond farm animals and rodent models, there is virtually no evidence of chronic pain in other mammals. Since evidence is sparse, it is hard to conclude that it does not occur, but its apparent absence is compatible with the mismatch hypothesis. This article is part of the Theo Murphy meeting issue 'Evolution of mechanisms and behaviour important for pain'.

A Reduction in Pain Intensity Is More Strongly Associated With Improved Physical Functioning in Frustration Tolerant Individuals: A Longitudinal Moderation Study in Chronic Pain Patients

OBJECTIVE

The onset and chronification of pain often has devastating consequences on the physical and mental functioning of individuals. Medical interventions are quite efficacious in reducing pain levels. However, changes in physical and mental health status after medical interventions are not proportional. In the past decades, rational/irrational beliefs, especially catastrophizing, have contributed to a better understanding of the pain experience. This study explores whether pain reduction efforts are more beneficial for individuals scoring high in rational thinking (moderation).

METHODS

The study design was longitudinal. Patients were assessed twice, 2 weeks prior to the start of medical treatment at the pain clinic and 6 months after. A total of 163 patients with heterogeneous pain (mostly low back and neck pain) participated in the study. Their mean age was 58.74 years (SD = 14.28) and 61.3% were female.

RESULTS

Overall, there was a reduction in pain intensity (t = 4.25, p < 0.001, d = 0.32). An improvement in physical functioning (t = 4.02, p < 0.001, d = 0.19), but not mental health (t = -0.66, p = 0.511, d = 0.11) was also observed. In the regression analyses, a decrease in pain intensity was moderately associated with improved physical health (β = 0.87, t = 4.96, p < 0.001, R 2 change = 0.177). This association was found to be moderated by frustration tolerance (β = -0.49, t = -2.80, p = 0.006, R 2 change = 0.039). Specifically, post hoc analyses indicated that changes in pain intensity only correlated with changes in physical health when patients reported high frustration tolerance levels (r = 0.47, p = 0.006, M = 7, n = 32), but not when patients were intolerant to frustration (r = 0.28, p = 0.078, M = 17, n = 41).

CONCLUSION

The results suggest that frustration tolerance may render adaptive by facilitating the positive effect that a reduction in pain intensity has on physical health status. The study findings are discussed in the context of personalized therapy with an emphasis on how to maximize the effectiveness of current interventions for pain.

Adverse Childhood Experiences and Trauma-Informed Care in Rehabilitation Clinical Practice

Adverse childhood experiences (ACEs) contribute to physical, behavioral, and mental health issues throughout the lifespan and, because of their prevalence, constitute a significant public health issue. Practitioners in all health care disciplines need to be knowledgeable about ACEs and prepared to address them. ACEs can contribute to conditions that lead patients to seek rehabilitation care, and therefore a framework is needed that enables rehabilitation professionals to understand the effects of ACEs and how to discuss them with patients. This article summarizes ACE research and its clinical relevance, presents an overview of the related topic of trauma-informed care, and introduces rehabilitation professionals to practical tools for incorporating ACE- and trauma-informed care into clinical practice.

There is growing acknowledgement across all health care disciplines of the impact of ACEs. ACEs are understood as stressful, potentially traumatic events that may have lasting negative effects on health and well-being. Since the 1990s, when landmark research found striking associations between early life stress and adversity and a wide range of chronic physical, behavioral, and mental health issues, international attention to ACEs as a major public health issue has grown.1, 2 ACE-related research has identified strong correlations between chronic disease, stress, and prior experience. Eighty-six percent of health care dollars in the United States are spent on chronic diseases, and a population health strategy should include empowering, person-centered, low-risk, low-cost, self-management skill-building practices to help patients manage the stress response.³

Though a relevant consideration for all care provision, the biopsychosocial framework may be particularly important for understanding and working with chronic health conditions.4, 5, 6, 7 For example, chronic pain affects 116 million in the United States⁸ and may be a key force in driving patients to seek rehabilitation services. Patients need their providers to skillfully and comprehensively navigate the intersection of mental, emotional, and physical components of their healing process. Given the prevalence of ACEs and their potential contribution to chronic pain, among other conditions, rehabilitation professionals should be prepared to address ACEs in the clinical setting as a possible underlying contributor to the condition for which treatment is sought. This article provides an overview of ACEs research and the health effects that can result from ACEs and introduces a trauma-informed practical guide for rehabilitation professionals to use in clinical encounters.

•

Adverse childhood experiences (ACEs) contribute to a broad spectrum of health challenges across the lifespan and constitute a significant public health issue.

•

Rehabilitation professionals routinely work with individuals experiencing health challenges that may be linked to ACEs.

•

Models of trauma-informed care and resilience-building approaches assist rehabilitation professionals in contributing to a solution to the prevalence of ACEs and chronic stress in the population.

•

A novel schema is presented to assist rehabilitation professionals in navigating the topic of ACEs in clinical care.

Lumbar range of motion in chronic low back pain is predicted by task-specific, but not by general measures of pain-related fear

BACKGROUND

Most studies fail to show an association between higher levels of pain-related fear and protective movement behaviour in patients with chronic low back pain (CLBP). This may be explained by the fact that only general measures of pain-related fear have been used to examine the association with movement patterns. This study explored whether task-specific, instead of general measures of pain-related fear can predict movement behaviour.

METHODS

Fifty-five patients with CLBP and 54 healthy persons performed a lifting task while kinematic measurements were obtained to assess lumbar range of motion (ROM). Scores on the Photograph Daily Activities Series-Short Electronic Version (PHODA-SeV), Tampa Scale for Kinesiophobia and its Activity Avoidance and Somatic Focus subscales were used as general measures of pain-related fear. The score on a picture of the PHODA-SeV, showing a person lifting a heavy object with a bent back, was used as task-specific measure of pain-related fear.

RESULTS

Lumbar ROM was predicted by task-specific, but not by general measures of pain-related fear. Only the scores on one other picture of the PHODA-SeV, similar to the task-specific picture regarding threat value and movement characteristics, predicted the lumbar ROM. Compared to healthy persons, patients with CLBP used significantly less ROM, except the subgroup with a low score on the task-specific measure of pain-related fear, who used a similar ROM.

CONCLUSIONS

Our results suggest to use task-specific measures of pain-related fear when assessing the relationship with movement. It would be of interest to investigate whether reducing task-specific fear changes protective movement behaviour.

SIGNIFICANCE

This study shows that lumbar range of motion in CLBP is predicted by task-specific, but not by general measures of pain-related fear. This suggests that both in clinical practice and for research purposes, it might be recommended to use task-specific measures of pain-related fear when assessing the relationship with movement behaviour. This may help to disentangle the complex interactions between pain-related fear, movement and disability in patients with CLBP.

GLA:D® Back: implementation of group-based patient education integrated with exercises to support self-management of back pain - protocol for a hybrid effectiveness-implementation study

BACKGROUND

Reassuring patient education and exercise therapy are widely recommended interventions for back pain in clinical guidelines. However, many patients are offered non-guideline endorsed options, and strategies for effective implementation of guideline-based care have not yet been developed. This protocol outlines the evaluation of a strategy for nationwide implementation of standardised patient education and exercise therapy for people with persistent or recurrent back pain in a hybrid implementation-effectiveness design. The strategy and the evaluation were planned using the framework of the Behaviour Change Wheel.

METHODS

The main activity of the implementation strategy is a two-days course for physiotherapists and chiropractors in delivering patient education and exercise therapy that is aimed at supporting patient self-management. This comes with ready-to-use patient education materials and exercise programs. The clinical intervention is a group-based program consisting of two sessions of patient education and 8 weeks of supervised exercises. The program uses a cognitive-behavioural approach and the aim of the exercise component is to restore the patient's ability and confidence to move freely. The implementation process is evaluated in a dynamic process monitoring the penetration, adoption and fidelity of the clinical intervention. The clinical intervention and potential effect mechanisms will be evaluated at the patient-level using measures of knowledge, skills, beliefs, performance, self-efficacy and success in self-management. The education of clinicians will be evaluated via clinician-level outcomes, including the Pain Attitudes and Beliefs Scale, the Practitioner Confidence Scale, and the Determinants of Implementation Behaviour Questionnaire. Effects at a national level will be investigated via data from national registries of health care utilisation and sick-leave.

DISCUSSION

This implementation-effectiveness study is designed to evaluate the process of implementing an evidence-based intervention for back pain. It will inform the development of strategies for implementing evidence-based care for musculoskeletal pain conditions, it will enhance the understanding of mechanisms for developing patient self-management skills, and it will demonstrate the outcomes that are achievable in everyday clinical practice.

TRIAL REGISTRATION

ClinicalTrials.gov NCT03570463 . Registered 27 June 2018.

The Fear of Pain Questionnaire: Factor structure, validity and reliability of the Italian translation

Background

The Fear of Pain Questionnaire-III (FPQ-III) is a self-report instrument developed to assess fear of different stimuli usually causing pain. The present study aimed to construct an Italian version of the FPQ-III and examine its psychometric properties in a heterogeneous sample of Italian healthy individuals.

Methods

The questionnaire was translated following the forward-backward method and completed by 511 Italian adults who met the inclusion criteria. Within 2 months of the first assessment, a subgroup of participants (n = 164) was re-tested. The factorial structure of the FPQ-III was assessed by confirmatory factor analysis (CFA). To better comprehend the FPQ-III’s factorial structure, a CFA was also performed for each of the two reduced versions of the FPQ-III, namely the FPQ-Short Form and the FPQ-9. Divergent validity, test-retest reliability, and gender/age measurement invariance were also evaluated.

Results

The results of the CFA revealed that the original three-factor model poorly fitted the data, but it became satisfactory after allowing correlated error terms. Concerning divergent validity, correlations between FPQ-III scores and pain intensity, depression, and anxiety were found to be positive but weak in magnitude (< .20). FPQ-III subscales and total scores showed good internal consistency and time reliability. Finally, scalar invariance was only partially obtained, whereas all the other types of invariance were fully respected both for gender and age.

Conclusions

The current findings indicate that the Italian version of the FPQ-III provides valid and reliable scores for the assessment of fear of pain in the Italian population.

Low back pain

Low back pain affects individuals of all ages and is a leading contributor to disease burden worldwide. Despite advancements in assessment and treatment methods, the management of low back pain remains a challenge for researchers and clinicians alike. One reason for the limited success in identifying effective treatments is the large variation in the manifestations, possible causes, precipitating and maintaining factors, course, prognosis and consequences in terms of activity interference and quality of life. However, despite these challenges, steady progress has been achieved in the understanding of back pain, and important steps in the understanding of the psychological and social risk factors, genetics and brain mechanisms of low back pain have been made. These new findings have given impetus to the development of new diagnostic procedures, evidence-based screening methods and more targeted interventions, which underscore the need for a multidisciplinary approach to the management of low back pain that integrates biological, psychological and social aspects.

GLA:D® Back group-based patient education integrated with exercises to support self-management of back pain - development, theories and scientific evidence

BACKGROUND

Clinical guidelines recommend that people with back pain be given information and education about their back pain, advice to remain active and at work, and exercises to improve mobility and physical activity. Guidelines, however, rarely describe how this is best delivered. The aim of this paper is to present the development, theories, and underlying evidence for 'GLA:D Back' - a group education and exercise program that translates guideline recommendations into a clinician-delivered program for the promotion of self-management in people with persistent/recurrent back pain.

METHODS

GLA:D Back, which included a rationale and objectives for the program, theory and evidence for the interventions, and program materials, was developed using an iterative process. The content of patient education and exercise programs tested in randomised trials was extracted and a multidisciplinary team of expert researchers and clinicians prioritised common elements hypothesised to improve back pain beliefs and management skills. The program was tested on eight people with persistent back pain in a university clinic and 152 patients from nine primary care physiotherapy and chiropractic clinics. Following feedback from the clinicians and patients involved, the working version of the program was created.

RESULTS

Educational components included pain mechanisms, pain modulation, active coping strategies, imaging, physical activity, and exercise that emphasised a balance between the sum of demands and the individual's capacity. These were operationalised in PowerPoint presentations with supporting text to aid clinicians in delivering two one-hour patient education lectures. The exercise program included 16 supervised one-hour sessions over 8 weeks, each comprising a warm-up section and eight types of exercises for general flexibility and strengthening of six different muscle groups at four levels of difficulty. The aims of the exercises were to improve overall back fitness and, at the same time, encourage patients to explore variations in movement by incorporating education content into the exercise sessions.

CONCLUSION

From current best evidence about prognostic factors in back pain and effective treatments for back pain, research and clinical experts developed a ready-to-use structured program - GLA:D® Back - to support self-management for people with persistent/recurrent back pain.

Health concerns of veterans with high-level lower extremity amputations

BACKGROUND

The aim of the study was to identify health concerns of veterans with high-level lower extremity amputations.

METHODS

Through a cross-sectional study, general practitioners, an orthopedic specialist, psychologists, psychiatrists, physiotherapist and prosthetists examined 100 veterans using a short-form health-related quality of life questionnaire (SF-36) that assessed their ability to perform activities of daily living (ADL), instrumental activities of daily living (IADL) and life satisfaction (SWLS) after hip disarticulation or hemi-pelvectomy amputations. The assessment tool was designed to gather statistically useful information about their health needs.

RESULTS

The means of the Physical Component Summary (PCS), Mental Component Summary (MCS), SWLS, ADL and IADL were 48.58 ± 29.6, 33.33 ± 22.0, 19.30 ± 7.7, 48.10 ± 10.5 and 5.08 ± 1.8, respectively. Somatization, depression, and anxiety were the most prevalent disorders; among the veterans who were visited by psychiatrists, 11.6% had a history of hospitalization in a psychiatry section, and 53.2% had a psychiatric visit. Regardless of their injury in battle, 34% of veterans were hospitalized. Hearing problems were common, and about four-fifths of the participants suffered from at least one orthopedic condition. Neuroma (49%) was the most common stump-related complication during orthopedic evaluations, though the prevalence of phantom pain was 81% during the pain assessment. A total of 87% of the participants had a history of wearing a prosthesis, but only 29% wore a prosthesis at the time of the present study. The Canadian-type of prosthesis was uncomfortable and not useful (27%) and excessively heavy (10%) according to the amputees.

CONCLUSIONS

Understanding veterans' characteristics and special needs are important to make sure that enough facilities and services are afforded to them. These findings emphasize the importance of paying close attention to different dimensions of health in veterans and can help health providers identify health needs and make regular assessments.

Optimizing Placebo and Minimizing Nocebo to Reduce Pain, Catastrophizing, and Opioid Use: A Review of the Science and an Evidence-Informed Clinical Toolkit

Pain, a noxious psychosensory experience, motivates escape behavior to assure protection and survival. Psychological factors alter the experience and trajectory of pain, as well as behavior and treatment response. In the context of pain, the placebo effect (expectation for pain relief) releases endogenous opioids and facilitates analgesia from exogenously administered opioids. Nocebo hyperalgesia (expectation for persistent or worsening pain) opposes endogenous opioid analgesia and patient engagement in prescription opioid tapering. Reductions in nocebo hyperalgesia and pain catastrophizing may enhance descending modulation of pain, mediate adaptive structural brain changes and promote patient engagement in opioid tapering. Interventions that minimize nocebo and optimize placebo may adaptively shape the central nervous system toward pain relief and potentially opioid reduction. Here we provide a critical description of catastrophizing and its impact on pain, placebo and nocebo effects. We also consider the importance of minimizing nocebo and optimizing placebo effects during prescription opioid tapering, and offer a clinical toolkit of resources to accomplish these goals clinically.

Physiotherapy pain curricula in Finland: a faculty survey

Background and aims

Despite the recognition of pain as a global health problem and advancements achieved in what is known about effective pain management, pain education for undergraduate health care professionals remains insufficient. This study investigated the content of pain curricula and the time allocated to pain education on physiotherapy programs at bachelor’s level at Universities of Applied Sciences (UASs) in Finland.

Methods

A web-based survey questionnaire was sent to the directors of the physiotherapy programs at all the Finnish UASs (n=15) where physiotherapy is taught at bachelor’s level. The questionnaire consisted of 14 questions covering basic concepts and the science of pain, pain assessment, pain management, and the adequacy of pain curricula. Each UAS completed one questionnaire i.e. returned one official opinion.

Results

The response rate was 80% (n=12). The mean for the total number of contact hours of pain education was 74 (standard deviation 34.2). All UASs had integrated pain education. In addition to this 42% (n=5) of the UASs had a separate pain course. The UASs offering such a course over and above the integrated pain education had twice the amount of pain content education compared to those UASs that only had integrated pain education (mean 103 h vs. 53 h, p=0.0043). Most of the education was devoted to conditions where pain is commonly a feature, manual therapy, and electrical agents for pain control. The biopsychosocial model of pain, cognitive behavioral methods of pain management, physician management, and multidisciplinary management were the least covered topics. Five UASs (42%) payed attention to the International Association for the Study of Pain curriculum outline and only 33% (n=4) considered their pain education to be sufficient.

Conclusions

Our results indicate that more contact hours are devoted to pain education on the Finnish UASs’ physiotherapy programs at bachelor’s level, than has previously been reported in faculty surveys. A separate pain course is one way to ensure a sufficient amount of pain education. Overall, despite a sufficient time devoted to pain education, some essential pain contents were inadequately covered.

Implications

The study contributes information on how pain education can be organized on physiotherapy programs at undergraduate level. Besides a sufficient amount of pain education, which can be ensured by a separate pain course, attention should be paid to pain education content being up-to-date. This could help in estimating the different proportions of pain content needed in educational settings. Efforts should also be made at keeping integrated pain education well-coordinated and purposeful. There is a need for further research estimating the effectiveness of pain education according to the different ways in which it is organized. There is also a need to investigate whether more hours allocated to pain education results in better understanding and professional skills.