Psychological aspects of pain prevention

Reaching experts for enhanced referral (REFER) to pain psychology: a modified Delphi approach with multidisciplinary paediatric pain providers at a specialised center in the USA

BACKGROUND

To minimise the referral gap to pain psychology, the purpose of this study was to describe clinician-perceived patient suitability for pain psychology referral, develop a referral plan and outline essential elements of a referral conversation via a modified Delphi approach with multidisciplinary paediatric pain providers.

METHODS

We employed a three-round modified Delphi approach consulting multidisciplinary paediatric pain providers (n=18) including physicians, psychologists, physical therapists, occupational therapists and nurse practitioners (PT, OT, NP). Based on the responses to an online survey (Round 1), initial statements regarding the pain psychology referral process were developed. These statements were revised in three separate panels (MD panel, PSY panel, PT, OT, NP panel; Round 2). A priori consensus criteria were verified for each statement within and between groups using anonymous responses to a concluding online survey (Round 3).

RESULTS

Approximately one-third of the statements (35%) reached consensus across all panels. For example, paediatric pain providers agreed that referrals should be communicated verbally, along with written materials, and that pain should be explained early from a biopsychosocial perspective. Paediatric pain providers also suggested minimising barriers through a flexible, stepped-care approach that adapts the delivery of pain psychology beyond traditional models. However, most statements reached consensus in only one or two panels (52%), indicating a lack of consensus across disciplines. The data suggest that it was comparatively easier to reach an overall consensus on statements formulating an ideal referral process to pain psychology (50%) than on statements characterising patient suitability (13%).

CONCLUSIONS

Paediatric pain providers developed an actionable plan for pain psychology referrals. This plan could bridge referral gaps and improve access to pain psychology treatment. Given the low provider consensus on patient suitability, further research is warranted to understand pain psychology referral decision-making, including differing perceptions of patient suitability across disciplines.

Risk factors associated with re-revision following revision total knee arthroplasty: a systematic review

Aims

The aim of this study was to perform a systematic review and bias evaluation of the current literature to create an overview of risk factors for re-revision following revision total knee arthroplasty (rTKA).

Methods

A systematic search of MEDLINE and Embase was completed in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. The studies were required to include a population of index rTKAs. Primary or secondary outcomes had to be re-revision. The association between preoperative factors and the effect on the risk for re-revision was also required to be reported by the studies.

Results

The search yielded 4,847 studies, of which 15 were included. A majority of the studies were retrospective cohorts or registry studies. In total, 26 significant risk factors for re-revision were identified. Of these, the following risk factors were consistent across multiple studies: age at the time of index revision, male sex, index revision being partial revision, and index revision due to infection. Modifiable risk factors were opioid use, BMI > 40 kg/m2, and anaemia. History of one-stage revision due to infection was associated with the highest risk of re-revision.

Conclusion

Overall, 26 risk factors have been associated with an increased risk of re-revision following rTKA. However, various levels of methodological bias were found in the studies. Future studies should ensure valid comparisons by including patients with identical indications and using clear definitions for accurate assessments.

Psychological treatments for the management of pain after musculoskeletal injury: a systematic review and meta-analysis

ABSTRACT

Musculoskeletal injury is a leading cause of pain and disability worldwide; 35% to 75% of people experience persistent pain for months and years after injury. Psychological treatments can reduce pain, functional impairment, and psychological distress but are not widely used after injury. This systematic review and meta-analysis (PROSPERO ID: CRD42021236807) aimed to synthesize the literature testing psychological treatments for pain after musculoskeletal injury. We searched EMBASE, MEDLINE, PubMed, PsycINFO, and CENTRAL from inception to May 2022. We extracted participant, treatment, and injury characteristics and primary (eg, pain intensity, functional impairment, depression, anxiety, and PTSD symptoms) and secondary (treatment feasibility and acceptability) outcomes. Twenty-four randomized controlled trials (N = 1966) were included. Immediately posttreatment, people who received psychological treatments (versus any control) reported lower pain intensity (standardized mean differences [SMD] = -0.25, 95% confidence interval [-0.49, -0.02]), functional impairment (SMD = -0.32 [-0.55, -0.09]), and symptoms of depression (SMD = -0.46 [-0.64, -0.29]), anxiety (SMD = -0.34 [-0.65, -0.04]), and PTSD (SMD = -0.43 [-0.70, -0.15]); at 6-month follow-up, only depression symptoms were significantly lower. Included trials varied widely in treatment and injury characteristics. The certainty of evidence was low or very low for most effects and heterogeneity moderate to substantial. Most studies had risk of bias domains judged to be high or unclear. Owing to very low certainty of results, we are unsure whether psychological therapies reduce pain and functional impairment after musculoskeletal injury; they may result in improved depression immediately posttreatment and at follow-up. More research is needed to identify treatments that result in enduring effects.

The combined effects of coping and pain interference on army readiness

Introduction

Chronic pain and associated interference with daily activities are common in the military and impact Force readiness. Chronic pain affects one-third of service members and is a leading cause of medical non-readiness (MNR) in the military. Research suggests that underlying psychological mechanisms related to trait coping styles and pain interference (PI) affect functional outcomes, but little research exists examining this relationship within an Army population. The purpose of this study was to examine the combined effects of PI and coping on U.S. Army soldier readiness by using annual well-being data from the Global Assessment Tool (GAT) and medical non-readiness (MNR) based on duty restriction records.

Methods

The sample comprised 866,379 soldiers who completed the GAT between 2014 and 2017 with no duty restrictions at the time of baseline GAT completion; subjects were observed through 2018 for duty restrictions. Parametric survival regression models with a Weibull distribution predicted demographic-adjusted hazards of MNR by dichotomized PI (no PI/PI) and beneficial/non-beneficial use of GAT coping components (good coping, bad coping, catastrophizing-flexibility, and catastrophizing-hopelessness). Incident MNR was evaluated for all duty restrictions, and stratified by selected body systems (upper extremity, lower extremity, psychiatric).

Results

Among soldiers with PI, hazards were higher in those reporting non-beneficial coping styles (bad coping, hopelessness) and lower in those reporting beneficial coping styles (good coping, flexibility). Across all coping styles, PI/coping interactions were particularly strong for catastrophizing-hopelessness and when examining MNR from psychiatric conditions.

Discussion

These findings suggest some synergistic associations between pain and coping that may impact pain-related occupational disability. Coping skills may be an effective interventional target for chronic pain reduction/prevention within military programs, such as the Master Resilience Training Course offered to soldiers in the Army. Further research should assess whether early coping style interventions can reduce pain-related outcomes.

[Debora: Long-Term Effectiveness of an Inpatient Combined Pain Competence and Depression Prevention Training for Non-Specific Chronic Low Back Pain and Depressive Symptoms]

OBJECTIVE

To investigate the effects of an intervention for pain competence and depression prevention for multidisciplinary inpatient rehabilitation of non-specific chronic low back pain on psychological and work-related outcomes over a 2-year period.

METHODS

This prospective randomized controlled multicenter trial evaluated the effects of pain competence training with and without depression prevention on depressive symptoms (General Depression Scale; ADS; primary outcome), anxiety (Hospital Anxiety and Depression Scale), pain self-efficacy (Pain Self-Efficacy Questionnaire) and subjective prognosis of gainful employment (SPE; secondary outcomes) in n=422 patients aged 32-64 years from four rehabilitation clinics. Per protocol analyses were conducted. In the three-factorial design with a repeated-measures factor, patients were stratified by treatment condition; the control group (CG) received only pain management training but the intervention group (IG) was additionally treated with depression prevention training (Debora). Based on the ADS, patients were assigned to without or low depressive symptoms (ADS<23; n=208) and medium or high depressive symptoms (ADS≥23; n=214). The fivefold repeated-measures factor included the following sample points: admission, immediately after and 6, 12, and 24 months after rehabilitation. Per protocol results of univariate 2×2×5 analyses of variance were validated by n=1225 multiple imputed data.

RESULTS

No significant effects of treatment condition over the 2-year period were yielded in the primary outcome "depressive symptoms", but only patients with the combined training Debora benefited in pain self-efficacy in the long term. Intention-to-treat analyses suggest incremental effects of Debora on pain self-efficacy and anxiety at 24-month follow-up. In the long term, patients with high levels of depressive symptoms improved exclusively in depressive symptoms or they benefited more than patients with low depression in anxiety. However, favorable effects receded in general from post rehabilitation to 24-month follow-up.

DISCUSSION

 The results support that a disorder-specific depression prevention training is needed for the long-term improvement in pain self-efficacy, which is considered a crucial psychological protective factor in pain chronification. Findings on depressive symptoms support the effectiveness of multidisciplinary inpatient rehabilitation in high depression, but also the great importance of early treatment of depressive symptoms.

CONCLUSION

 Overall, the results strengthen the need to implement psychotherapeutic treatment elements and, in particular, cognitive-behavioral methods and, moreover, a systematic allocation of patients to needs-based treatments in order to improve long-term effects.

An Italian Twin Study of Non-Cancer Chronic Pain as a Wide Phenotype and Its Intensity

Background and Objectives: Non-cancer chronic pain (CP) results from the interaction between genetic and environmental factors. Twin studies help to estimate genetic and environmental contributions to complex traits such as CP. To date, twin studies on the heritability of pain phenotypes have relied almost exclusively on specific diagnoses, neglecting pain intensity. This study aims to estimate the genetic and environmental contributions to CP occurrence as a wide phenotype and its intensity among a non-clinical population. Materials and Methods: A nationwide online survey was conducted in February 2020 on 6000 adult twins enrolled in the Italian Twin Registry. A five-item questionnaire, designed and validated by our study group, was administered to detect the CP condition along with its intensity, underlying causes or triggers, treatments, and self-perceived efficacy. The twin study design was used to infer the relative weight of genes and environment on CP occurrence and intensity, and biometrical modelling was applied to these phenotypes. Results: A total of 3258 twins, aged ≥18, replied to the online survey (response rate 54%). These included 762 intact pairs (mean age: 39 years; age range: 18–82 years; 34% male; CP prevalence: 24%), of whom 750 pairs were subjected to biometrical modelling after the exclusion of pairs with either unknown zygosity or cancer-associated CP. Broad-sense heritability estimates were driven by non-additive genetic effects and were 0.36 (0.19–0.51) for CP occurrence and 0.31 (0.16–0.44) for CP intensity. No evidence emerged for either sex differences in genetic and environmental variance components or interactions of these components with age. Conclusions: Moderate non-additive genetic components were suggested for non-cancer CP occurrence and its intensity. These results encourage further research on the gene–gene interactions underlying CP liability and associated phenotypes, and also strengthen the need for prevention strategies to avoid CP occurrence or to decrease pain intensity.