Psychosocial predictors in the transition from acute to chronic pain: a systematic review

The prevalence of cervical contribution in patients reporting shoulder pain. An observational study

BACKGROUND

Shoulder pain is the third most common musculoskeletal disorder yet diagnosis remains challenging. In some cases, shoulder symptoms can be partially attributed to a cervical origin.

OBJECTIVES

To estimate the prevalence of cervical contribution in patients presenting with shoulder pain. To determine symptom reproduction and symptom modification (i.e., pain intensity and pain location) after cervical spine screening (CSS) and compare these changes between patients with and without cervical contribution.

DESIGN

Observational study.

METHOD

Sixty patients were included. Cervical contribution was present if a ≥30.0% change in shoulder pain intensity on active movement was recorded after CSS. The CSS consisted of several tests and shoulder symptom modification or reproduction was noted. The presence of a centralization phenomenon was also noted and was considered to be present if the location of pain diminished from more distal areas after the CSS.

RESULTS

A 50.0% prevalence of cervical contribution (CI95% 37,35-62,65) was found. Cervical contribution was more likely in those that demonstrated centralization of their pain after the CSS (p = 0.002) and those that had a history of previous neck pain (p = 0.007). Symptom reproduction occurred for 23 out of the 60 participants (38.3%), being present in 18 of those with cervical contribution (60.0%). After the CSS, a statistically significant decrease of shoulder pain intensity was found for those classified as having cervical contribution (p < 0.001).

CONCLUSIONS

Cervical contribution is prevalent in 50% of patients presenting with shoulder pain; this was evidenced as shoulder symptom modification and, to a lesser extent, symptom reproduction following a CSS.

Brain white matter pathways of resilience to chronic back pain: a multisite validation

Chronic back pain (CBP) is a global health concern with significant societal and economic burden. While various predictors of back pain chronicity have been proposed, including demographic and psychosocial factors, neuroimaging studies have pointed to brain characteristics as predictors of CBP. However, large-scale, multisite validation of these predictors is currently lacking. In two independent longitudinal studies, we examined white matter diffusion imaging data and pain characteristics in patients with subacute back pain (SBP) over six- and 12-month periods. Diffusion data from individuals with CBP and healthy controls (HC) were analyzed for comparison. Whole-brain tract-based spatial statistics analyses revealed that a cluster in the right superior longitudinal fasciculus (SLF) tract had larger fractional anisotropy (FA) values in patients who recovered (SBPr) compared to those with persistent pain (SBPp), and predicted changes in pain severity. The SLF FA values accurately classified patients at baseline and follow-up in a third publicly available dataset (Area under the Receiver Operating Curve ~ 0.70). Notably, patients who recovered had FA values larger than those of HC suggesting a potential role of SLF integrity in resilience to CBP. Structural connectivity-based models also classified SBPp and SBPr patients from the three data sets (validation accuracy 67%). Our results validate the right SLF as a robust predictor of CBP development, with potential for clinical translation. Cognitive and behavioral processes dependent on the right SLF, such as proprioception and visuospatial attention, should be analyzed in subacute stages as they could prove important for back pain chronicity.

Chronic Postsurgical Pain Following Lung Transplantation: Characteristics, Risk Factors, Treatment, and Prevention: A Narrative Review

Chronic pain after lung transplantation (LTx) can substantially reduce quality of life (QoL), yet current consensus guidelines say little about how to prevent or manage it. Research on pain after LTx has tended to focus on acute rather than chronic pain, and it has not extensively examined the factors associated with onset or resolution of chronic pain, which differ from factors influencing chronic pain after general thoracic surgery. This narrative review explores what is known about the epidemiology and risk factors of chronic pain after LTx, as well as effective ways to treat or prevent it. The review identifies key questions and issues that should be the focus of future research.

Biobehavioral Predictors of Pain Intensity, Pain Interference, and Chronic Pain Episodes: A Prospective Cohort Study of African-American Adults

Racial disparities in pain experiences are well-established, with African-American (AA) adults reporting higher rates of daily pain, increased pain severity, and greater pain-related interference compared to non-Hispanic Whites. However, the biobehavioral factors that predict the transition to chronic pain among AA adults are not well understood. This prospective cohort study provided a unique opportunity to evaluate predictors of chronic pain onset among 130 AA adults (81 women), ages 18 to 44, who did not report chronic pain at their baseline assessment and subsequently completed follow-up assessments at 6- and 12-months. Outcome measures included pain intensity, pain-related interference, and chronic pain status. Comprehensive assessments of sociodemographic and biobehavioral factors were used to evaluate demographics, socioeconomic status, stress exposure, psychosocial factors, prolonged hypothalamic-pituitary-adrenal secretion, and quantitative sensory testing responses. At baseline, 30 adults (23.1%) reported a history of prior chronic pain. Over the 12-month follow-up period, 13 adults (10.0%) developed a new chronic pain episode, and 18 adults (13.8%) developed a recurrent chronic pain episode. Whereas socioeconomic status measures (ie, annual income, education) predicted changes in pain intensity over the follow-up period, quantitative sensory testing measures (ie, pain threshold, temporal summation of pain) predicted changes in pain interference. A history of chronic pain and higher depressive symptoms at baseline independently predicted the onset of a new chronic pain episode. The present findings highlight distinct subsets of biobehavioral factors that are differentially associated with trajectories of pain intensity, pain-related interference, and onset of chronic pain episodes in AA adults. PERSPECTIVE: This prospective study sought to advance understanding of biobehavioral factors that predicted pain outcomes over a 12-month follow-up period among AA adults without chronic pain at their initial assessment. Findings revealed distinct subsets of factors that were differentially associated with pain intensity, pain-related interference, and onset of chronic pain episodes.

Incidence and Risk Factors of Chronic Postoperative Pain in Same-day Surgery: A Prospective Cohort Study

BACKGROUND

The amount of same-day surgery has increased markedly worldwide in recent decades, but there remains limited evidence on chronic postsurgical pain in this setting.

METHODS

This study assessed pain 90 days after ambulatory surgery in an international, multicenter prospective cohort study of patients at least 45 yr old with comorbidities or at least 65 yr old. Pain was assessed using the Brief Pain Inventory. Chronic postsurgical pain was defined as a change of more than 1 point in self-rated average pain at the surgical site between baseline and 90 days, and moderate to severe chronic postsurgical pain was defined as a score greater than 4 in self-rated average pain at the surgical site at 90 days. Risk factors for chronic postsurgical pain were identified using multivariable logistic regression.

RESULTS

Between November 2021 and January 2023, a total of 2,054 participants were included, and chronic postsurgical pain occurred in 12% of participants, of whom 93.1% had new chronic pain at the surgical site (i.e., participants without pain before surgery). Moderate to severe chronic postsurgical pain occurred in 9% of overall participants. Factors associated with chronic postsurgical pain were active smoking (odds ratio, 1.82; 95% CI, 1.20 to 2.76), orthopedic surgery (odds ratio, 4.7; 95% CI, 2.24 to 9.7), plastic surgery (odds ratio, 4.3; 95% CI, 1.97 to 9.2), breast surgery (odds ratio, 2.74; 95% CI, 1.29 to 5.8), vascular surgery (odds ratio, 2.71; 95% CI, 1.09 to 6.7), and ethnicity (i.e., for Hispanic/Latino ethnicity, odds ratio, 3.41; 95% CI, 1.68 to 6.9 and for First Nations/native persons, odds ratio, 4.0; 95% CI, 1.05 to 15.4).

CONCLUSIONS

Persistent postsurgical pain after same-day surgery is common, is usually moderate to severe in nature, and occurs mostly in patients without chronic pain before surgery.

EDITOR’S PERSPECTIVE

The Swedish version of the back pain attitudes questionnaire - Translation, cross-cultural adaptation and validation

BACKGROUND

Psychosocial factors influence low back pain (LBP) and guidelines recommend assessing unhelpful beliefs. The Back Pain Attitudes Questionnaire (Back-PAQ) is an instrument developed to assess LBP attitudes and beliefs. There is currently no Swedish translation of Back-PAQ.

OBJECTIVES

To translate and culturally adapt the Back-PAQ into Swedish (Back-PAQ-S) and to test its measurement properties.

DESIGN

Study of diagnostic accuracy/assessment scale.

METHODS

The cultural adaptation followed established guidelines and 120 individuals with and without nonspecific LBP (NSLBP) were recruited for the assessment of Back-PAQ-S's internal consistency, test-retest reliability, standard error of measurement (SEM) and smallest detectable change (SDC). Construct validity was assessed by testing hypotheses regarding Back-PAQ-S's relationship to the Back Beliefs Questionnaire (BBQ) and Tampa Scale of Kinesiophobia (TSK).

RESULTS

The Back-PAQ was translated and culturally adapted to Swedish. Expert panelists and informants thought items were relevant, comprehensive, and understandable. Back-PAQ-S of all lengths (34, 20 and 10-items) showed good internal consistency (Cronbach's α 0.95, 0.91 and 0.82) and excellent test-retest reliability (Intraclass correlation coefficient (ICC) 0.97, 0.96 and 0.95). The SEM was found to be 4.28, 3.13 and 1.66, and the SDC to be 11.85, 8.68 and 4.59 respectively. The Back-PAQ-S showed high positive correlations (Spearman's rho (rs) 0.78, 0.76 and 0.72) to the BBQ and moderate negative correlations (rs -0.67, -0.50 and -0.69) to the TSK.

CONCLUSION

The Back-PAQ-S has good validity and excellent reliability. It is viable for clinical and research use to assess LBP attitudes and beliefs in Swedish populations with and without NSLBP.

Effect of exposure-based vs traditional cognitive behavior therapy for fibromyalgia: a two-site single-blind randomized controlled trial

ABSTRACT

Fibromyalgia is a debilitating pain condition for which treatment effects are typically modest. The most evaluated psychological treatment is traditional cognitive behavior therapy (T-CBT), but promising effects have recently been seen in exposure-based cognitive behavior therapy (Exp-CBT). We investigated whether Exp-CBT was superior to T-CBT in a randomized controlled trial. Self-referred participants with fibromyalgia (N = 274) were randomized (1:1) to 10 weeks of Exp-CBT or T-CBT. Treatments were delivered online and presented as "CBT for fibromyalgia." Participants were assessed at baseline, weekly during treatment, posttreatment, and at 6- and 12-month follow-up. Primary outcome was the difference in reduction in fibromyalgia severity as measured using the Fibromyalgia Impact Questionnaire (FIQ) over 11 assessment points from baseline to posttreatment, modelled within an intention-to-treat framework using linear mixed effects models fitted on multiple imputed data. Approximately 91% of weekly FIQ scores were collected over the main phase. There was no significant difference between Exp-CBT and T-CBT in the mean reduction of fibromyalgia severity from pretreatment to posttreatment (b = 1.3, 95% CI -3.0 to 5.7, P = 0.544, d = -0.10). Minimal clinically important improvement was seen 60% in Exp-CBT vs 59% in T-CBT. Effects were sustained up to 12 months posttreatment. This well-powered randomized trial indicated that Exp-CBT was not superior to T-CBT for fibromyalgia. Both treatments were associated with a marked reduction in fibromyalgia severity, and the online treatment format might be of high clinical utility. T-CBT can still be regarded a reference standard treatment that remains clinically relevant when compared to novel treatment approaches.

Interpersonal physiological and psychological synchrony predict the social transmission of nocebo hyperalgesia between individuals

Witnessing another's pain can heighten pain in the observer. However, research has focused on the observer's intrapersonal experience. Here, a social transmission-chain explored the spread of socially-acquired nocebo hyperalgesia. Dyads of genuine participants were randomised to 'Generations' (G1-G3). G1-Demonstrators, observed by G2-Observers, experienced high/low thermal pain contingent on supposed activity/inactivity of a sham-treatment. G2 became Demonstrators, witnessed by G3-Observers. They experienced fixed low-temperature stimuli irrespective of sham-treatment 'activity'. G3 then Demonstrated for G4-Observers (a confederate), also experiencing low-temperature stimuli only. Pain ratings, electrodermal activity, and facial action units were measured. G1's treatment-related pain propagated throughout the chain. G2 and G3 participants showed heightened subjective and physiological response to sham-treatment, despite equivalent stimulus temperatures, and G3 never witnessing the initial pain-event. Dyadic interpersonal physiological synchrony (electrodermal activity) and psychological synchrony (Observer's ability to predict the Demonstrator's pain), predicted subsequent socially-acquired pain. Implications relate to the interpersonal spread of maladaptive pain experiences.

Psychological Constructs From the Fear Avoidance Model and Beyond as Predictors for Persisting Symptoms After Concussion: An Integrative Review

OBJECTIVES

To identify the range of evidence for relationships between psychological factors using the Fear Avoidance Model (FAM) as a guiding framework and relevant clinical outcomes in adult patients with persisting symptoms after concussion (PSaC), develop a comprehensive understanding of psychological factors that have been identified as predictors of clinical outcomes for PSaC, and contribute to the theoretical framework of the FAM for PSaC.

DATA SOURCES

Six databases (CINAHL, Embase, PsycINFO, PubMed, SportDiscus, and Web of Science) were searched by a librarian for empirical and theoretical publications and experimental and quasi-experimental study designs. The literature search was not limited by publication date restrictions. Gray literature, with the exception of doctoral dissertations, was excluded.

STUDY SELECTION

We included studies in the English language consisting of human participants aged ≥18 years. Articles must have included both outcomes pertaining to PSaC (≥3mo after injury) and psychological constructs.

DATA EXTRACTION

One reviewer extracted data from the resulting studies using a standardized data extraction form designed for this review. Two reviewers independently assessed risk of bias using the Quality in Prognosis Studies tool.

DATA SYNTHESIS

This review found numerous psychological constructs, some directly linked to the FAM, that have potential prognostic relationships with PSaC. However, research remains limited and some psychological factors central to FAM were only identified in a small number of studies (catastrophizing, cogniphobia, and avoidance), whereas other psychological factors were studied more extensively (anxiety and depression).

CONCLUSIONS

There is the need for additional evidence, and this integrative review provides an adaptation of the FAM for PSaC to be used as a guiding preliminary framework for future research. Future research should aim to include psychological factors proposed in this modified FAM to fully understand PSaC.

Development, Insults and Predisposing Factors of the Brain's Predictive Coding System to Chronic Perceptual Disorders-A Life-Course Examination

The predictive coding theory is currently widely accepted as the theoretical basis of perception and chronic perceptual disorders are explained as the maladaptive compensation of the brain to a prediction error. Although this gives us a general framework to work with, it is still not clear who may be more susceptible and/or vulnerable to aberrations in this system. In this paper, we study changes in predictive coding through the lens of tinnitus and pain. We take a step back to understand how the predictive coding system develops from infancy, what are the different neural and bio markers that characterise this system in the acute, transition and chronic phases and what may be the factors that pose a risk to the aberration of this system. Through this paper, we aim to identify people who may be at a higher risk of developing chronic perceptual disorders as a reflection of aberrant predictive coding, thereby giving future studies more facets to incorporate in their investigation of early markers of tinnitus, pain and other disorders of predictive coding. We therefore view this paper to encourage the thinking behind the development of preclinical biomarkers to maladaptive predictive coding.

Motive Satisfaction Among Patients with Chronic Primary Pain: A Replication

We set out to replicate findings of significant (a) reductions in pain, psychological distress, and motivational incongruence (i.e., insufficient motive satisfaction) after interdisciplinary multimodal pain treatment and (b) associations between reductions in motivational incongruence (i.e., improved motive satisfaction) and decreases in psychological distress (Vincent et al., Journal of Clinical Psychology in Medical Settings 28:331-343, 2021). 475 Patients with chronic primary pain completed standardized self-reported questionnaires assessing motivational incongruence, psychological distress, pain intensity, and pain interference at intake and discharge from a tertiary psychosomatic university clinic. We used hierarchical linear models to analyze motivational incongruence's effects on psychological distress. We partially replicated Vincent et al.'s findings. Significant reductions in pain, psychological distress, and motivational incongruence after treatment were found. Reductions in motivational incongruence were associated with reductions in psychological distress. Similarly, a better motive satisfaction mediated the relationship between pain interference and psychological distress. Our findings show that reducing motivational incongruence may be a key component of treating chronic primary pain; we recommend to assess and target motivational incongruence to improve interdisciplinary multimodal pain treatment.

Predictors of treatment outcome in cognitive behavioural therapy for chronic pain: a systematic review

PURPOSE

The aim of this systematic review was to synthesise the research identifying possible influences on CBT outcomes in chronic pain. Variations in the effectiveness of psychological therapies, such as CBT, in chronic pain have led to research investigating predictors of improved treatment outcomes.

MATERIALS AND METHODS

We identified randomised controlled and cohort studies of CBT for chronic pain, published between 1974 to 2nd August 2023, which identified predictors of CBT outcomes.

RESULTS

Nineteen studies were included in the review. Baseline sociodemographic, physical and emotional factors that influence the outcomes of CBT for chronic pain were identified. The most commonly reported predictors of CBT outcome, with medium to large effect sizes, were anxiety, depression and negative cognitions about pain and coping. Sociodemographic predictors of outcomes demonstrated small effects and lacked replicability.

CONCLUSIONS

There was variability across study designs, CBT delivery and outcomes measures. Further research is needed in chronic pain to identify the predictive factors which influence treatment outcomes, and consistency across study designs and outcome variables is needed to reduce heterogeneity.

Socioeconomic Characteristics Associated With the Development of Chronic Pain After Pain Interference Experienced in Early Adulthood

OBJECTIVE

Predictors of pain persistence have been identified among patients undergoing treatment for chronic pain or related conditions, but correlates of pain persistence in the general population remain underexplored. We identify socioeconomic variables associated with pain onset or persistence over a 6 to 10 year period in a nationally representative cohort.

METHODS

Using panel data from the National Longitudinal Survey of Youth-1997, we examined the presence of pain interference at age 29 and chronic pain at ages 35 to 39. Persistent pain was defined as pain present at both interview time points; new-onset pain was defined as pain not reported at age 29, but present at ages 35 to 39; and transient pain was defined as experiencing pain interference at age 29 with no report of chronic pain at ages 35 to 39.

RESULTS

Based on a sample of 6188 participants, we estimated that 4% experienced persistent pain, 11% experienced transient pain, and 7% experienced new-onset pain. Pain persistence was less likely among non-Hispanic Black respondents but more likely among formerly married respondents and those with poor health, health-related work limitation, or greater pain interference at the age 29 baseline. New-onset pain was most likely among female respondents, respondents with some college education, and respondents with poor self-rated health or obesity at baseline.

DISCUSSION

Development of chronic pain by the mid-late 30s was common among young adults experiencing pain interference at age 29. Race/ethnicity, gender, and educational attainment exhibited different associations with persistence as compared with new onset of pain problems.

How Does Anxiety and Depression Affect the Outcome after Periradicular Infiltration Therapy?-A Retrospective Analysis of Patients Undergoing CT-Guided Single-Level Nerve Root Infiltration Due to Chronic Monoradicular Pain

The aim of this study was to research the influence of psychological confounders on patient-reported outcomes (PROs) after lumbar infiltration therapies of periradicular infiltrations (PRI). Patients who underwent PRI in a single center between June 2018 and December 2019 were included. PRI was performed in patients with predominantly unilateral lumbar radiculopathy which existed for at least 6 weeks based on single-level nerve root compression (caused by a herniated disc, stenosis of the lateral recess, or neuroforamen), confirmed by morphological imaging. The numeric pain rating scale (NRS) for back pain (BP) and leg pain (LP) and the Oswestry Disability Index (ODI) were assessed preinterventionally, on the first day (only NRS) and at 6 weeks, and then 3, 6, and 12 months postinterventionally. The minimally clinically important difference (MCID) served as the threshold for the therapeutic effectiveness evaluation. The health-related quality of life (SF-36) was recorded preinterventionally and after 12 months. Based on the Hospital Anxiety and Depression Scale, the patients were dichotomized into depressed or nondepressed and anxious or nonanxious. Categorical data were evaluated using Fisher's exact test, and continuous data were evaluated using Student's t test. Separate linear mixed models were built to estimate the effect of anxiety or depression on repeatedly measured PROs following PRI. Data were analyzed using SPSS software. The analysis included 102 patients. Most mean baseline PROs were significantly worse in anxious or depressed patients than in nonanxious or nondepressed patients: Anxiety NRS-BP (p = 0.007), ODI (p < 0.001); Depression NRS-BP (p = 0.026), NRS-LP (p < 0.001), ODI (p < 0.001). All patients showed a clinically meaningful reduction in pain and functional improvement over a 12-month follow-up. There was no significant difference in the estimated overall mean PRO between all patients (p > 0.05). In conclusion, anxiety and depression are associated with worse PROs before and after PRI. However, patients with underlying depression or anxiety can expect a similar gain in PRO compared to patients without depressive or anxious symptoms.

Suffering from chronic tinnitus, chronic neck pain, or both: Does it impact the presence of signs and symptoms of central sensitization?

Chronic subjective tinnitus is a prevalent symptom, which has many similarities with chronic pain. Central sensitization is considered as a possible underlying mechanism of both symptoms. Central sensitization has already been investigated in chronic pain populations but not in patients with chronic subjective tinnitus. Therefore, the main objective of this cross-sectional study was to compare signs and symptoms, indicative for central sensitization, in tinnitus patients with and without chronic idiopathic neck pain, patients with chronic idiopathic neck pain only, and healthy controls. Also, differences in psychological and lifestyle factors, possibly influencing the association between central sensitization and tinnitus, were examined as well as correlations between signs and symptoms of central sensitization, and tinnitus, pain, psychological and lifestyle factors. Differences in signs and symptoms of central sensitization were examined using the self-report Central Sensitization Inventory and QST protocol (local and distant mechanical and heat hyperalgesia, conditioned pain modulation). Tinnitus, pain, psychological and lifestyle factors were evaluated using self-report questionnaires. Symptoms of central sensitization and local mechanical hyperalgesia were significantly more present in both tinnitus groups, compared to healthy controls, but were most extensive in the group with chronic tinnitus+chronic idiopathic neck pain. Distant mechanical hyperalgesia, indicative for central sensitization, was only observed in the group with both chronic tinnitus+chronic idiopathic neck pain. This group also displayed a significantly higher psychological burden and poorer sleep than patients with chronic tinnitus only and healthy controls. Signs and symptoms of central sensitization were also shown to be associated with tinnitus impact, pain-related disability, psychological burden and sleep disturbances. This study shows preliminary evidence for the presence of central sensitization in patients with chronic tinnitus+chronic idiopathic neck pain. This could be explained by the higher perceived tinnitus impact, psychological burden and sleep problems in this group. Trial registration: This study is registered as NCT05186259 (www.clinicaltrials.gov).

Consideration of Psychosocial Factors in Acute Low Back Pain by Physical Therapists

Clinical guidelines consistently recommend screening psychosocial (PS) factors in patients with low back pain (LBP), regardless of its mechanical nature, as recognized contributors to pain chronicity. However, the ability of physiotherapists (PTs) in identifying these factors remains controversial. This study aimed to assess the current identification of psychosocial risk factors by physical therapists (PTs) and which characteristics of PTs are associated with the identification of the main risk for chronicity (physical or psychosocial). A cross-sectional descriptive study surveying Spanish PTs in public and private health services was conducted, including questions on PT characteristics and three low back pain (LBP) patient vignettes with different biopsychosocial (BPS) clinical presentations. From 484 respondents, the majority of PTs agreed regarding the main risk for chronicity for each vignette (PS 95.7% for vignette A, PS and physical 83.5% for vignette B and PS 66% for vignette C). Female PTs were more likely to rate psychosocial compared with males (p < 0.05). PTs with higher levels of social and emotional intelligence (both, p < 0.05) were more likely to identify the main risk for chronicity. However, only gender and social information processing for vignette A (p = 0.024) and emotional clarity for vignette B (p = 0.006) were able to predict the identification of psychosocial and physical risk, respectively. The main risk for chronicity was correctly identified by a large majority of PTs through patient vignettes. Gender, social and emotional intelligence played a relevant role in the recognition of psychosocial risk and biopsychosocial factors.

Transitional Pain Medicine; New Era, New Opportunities, and New Journey

Chronic postsurgical pain (CPSP), also known as persistent postsurgical pain (PPSP), is pain that develops or increases in intensity after a surgical procedure and lasts more than 3 months. Transitional pain medicine is the medical field that focuses on understanding the mechanisms of CPSP and defining risk factors and developing preventive treatments. Unfortunately, one significant challenge is the risk of developing opioid use dependence. Multiple risk factors have been discovered, with the most common, and modifiable, being uncontrolled acute postoperative pain; preoperative anxiety and depression; and preoperative site pain, chronic pain, and opioid use.

PROTOCOL: Fear avoidance model psychological factors as predictors for persistent post-concussion clinical outcomes: An integrative review

Background

Persisting symptoms after concussion (PSaC) include physical, cognitive, and psychological symptoms which contribute to rehabilitation challenges. Previous research has not thoroughly investigated the association between PSaC and pain-related psychological factors. Therefore, there is an opportunity to use current pain models, such as the Fear Avoidance Model (FAM), as a framework to explore these relationships. The goals of this integrative review are to (1) identify and describe range of evidence that explores relationships between psychological factors and clinical outcomes in patients with PSaC, and (2) develop a comprehensive understanding of FAM-specific psychological factors that have been identified as potential predictors of clinical outcomes in patients with PSaC.

Methods

This review will be based on principles and stages of an integrative review which will allow for inclusion of diverse methodologies: (1) problem formulation, (2) literature search, (3) data evaluation, (4) data analysis, and (5) presentation. Methods for reporting this review will be informed by the 2020 PRISMA guidelines for systematic reviews.

Discussion

The findings from this integrative review will inform healthcare professionals working in post-concussion rehabilitation settings regarding relationships between FAM psychological factors and PSaC-an area that until recently has not been thoroughly explored. Additionally, this review will inform the development of other reviews and clinical studies to further investigate relationships between FAM psychological factors and PSaC.

Integrative Review Registration

OSF DOI 10.17605/OSF.IO/CNGPW.

Distress Tolerance in the Comorbid Chronic Pain and Opioid Use Disorder Population

OBJECTIVES

The risk of opioid addiction among people with chronic pain is elevated in those using opioids to self-medicate physical or emotional pain or distress. The purpose of this study is to test the main effect of distress tolerance (DT) on opioid use disorder (OUD) status in people with chronic pain, and the potential moderating effect of DT in the relationship between known addiction risk factors and the development of OUD.

METHODS

One hundred twenty people with chronic pain were recruited to 1 of 3 groups according to their opioid use status (ie, current methadone or buprenorphine/naloxone for OUD [n = 60], history of OUD but current prolonged opioid abstinence [n = 30, mean abstinence = 121 weeks, SD = 23.3], and opioid naive [n = 30]). Participants completed self-report measures and a cold pressor task. Multinomial logistic regression analyses were used to test if DT associated with OUD status in people with chronic pain and to compare DT to other known indicators of OUD risk. Multinomial linear regression analyses were used to test the moderation effects of DT on the relationship between various risk factors and OUD in people with chronic pain.

RESULTS

Analyses revealed that DT was significantly related to OUD status but did not moderate the effects of most OUD risk factors.

CONCLUSIONS

These results suggest that decreasing distress (eg, pain levels, craving responses, etc) may be more effective than improving tolerance to distress for the comorbid chronic pain and OUD population.

Can exercise-based interventions reverse gray and white matter abnormalities in patients with chronic musculoskeletal pain? A systematic review

BACKGROUND

Recent evidence has suggested that reversal of gray or white matter abnormalities could be a criterion of recovery in patients with chronic pain.

OBJECTIVE

To determine the effectiveness of exercise-based interventions in reversing gray and white matter abnormalities in patients with chronic musculoskeletal pain.

METHODS

An electronic search was performed in the MEDLINE (Via PubMed), EMBASE, Web of Science, LILACS, SPORTDiscus, CINAHL, PEDro, and CENTRAL databases for articles published up to November 2022. Randomized clinical trials (RCTs) including patients with chronic musculoskeletal pain, which assessed the change in gray and white matter abnormalities after exercise-based interventions were selected. The risk of bias was assessed using the Risk of Bias II tool.

RESULTS

Four RCTs were included (n= 386). Three studies showed reversal of abnormalities with exercise-based interventions compared to control groups. The reversal was observed in the gray matter volume in the medial orbital prefrontal cortex and in the supplementary motor area of patients with osteoarthritis, in the hippocampus, insula, amygdala and thalamus in fibromyalgia patients. Furthermore, in patients with chronic spinal pain, reversal was observed in the gray matter thickness of the frontal middle caudal cortex and in the caudate, putamen and thalamus gray matter volume.

CONCLUSIONS

There is insufficient evidence to determine the effectiveness of exercise-based interventions for reversing gray and white matter abnormalities in patients with chronic pain. Further studies are still needed in this field.

Factors predicting the transition from acute to persistent pain in people with 'sciatica': the FORECAST longitudinal prognostic factor cohort study protocol

INTRODUCTION

Sciatica is a common condition and is associated with higher levels of pain, disability, poorer quality of life, and increased use of health resources compared with low back pain alone. Although many patients recover, a third develop persistent sciatica symptoms. It remains unclear, why some patients develop persistent sciatica as none of the traditionally considered clinical parameters (eg, symptom severity, routine MRI) are consistent prognostic factors.The FORECAST study (factors predicting the transition from acute to persistent pain in people with 'sciatica') will take a different approach by exploring mechanism-based subgroups in patients with sciatica and investigate whether a mechanism-based approach can identify factors that predict pain persistence in patients with sciatica.

METHODS AND ANALYSIS

We will perform a prospective longitudinal cohort study including 180 people with acute/subacute sciatica. N=168 healthy participants will provide normative data. A detailed set of variables will be assessed within 3 months after sciatica onset. This will include self-reported sensory and psychosocial profiles, quantitative sensory testing, blood inflammatory markers and advanced neuroimaging. We will determine outcome with the Sciatica Bothersomeness Index and a Numerical Pain Rating Scale for leg pain severity at 3 and 12 months.We will use principal component analysis followed by clustering methods to identify subgroups. Univariate associations and machine learning methods optimised for high dimensional small data sets will be used to identify the most powerful predictors and model selection/accuracy.The results will provide crucial information about the pathophysiological drivers of sciatica symptoms and may identify prognostic factors of pain persistence.

ETHICS AND DISSEMINATION

The FORECAST study has received ethical approval (South Central Oxford C, 18/SC/0263). The dissemination strategy will be guided by our patient and public engagement activities and will include peer-reviewed publications, conference presentations, social media and podcasts.

TRIAL REGISTRATION NUMBER

ISRCTN18170726; Pre-results.

Comparing tinnitus, pain, psychosocial and cognitive factors between patients with tinnitus and pain: A systematic review

OBJECTIVE

Tinnitus is a multifactorial symptom, which shows similarities with the involved mechanisms in chronic pain. The aim of this systematic review is to provide an overview of studies comparing patients with only tinnitus to patients with pain (headache, temporomandibular joint (TMJ) pain or neck pain) with or without tinnitus, regarding tinnitus-related, pain-related, psychosocial and cognitive factors.

METHODS

This systematic review was written following the PRISMA guidelines. To identify relevant articles, PubMed, Web of Science and Embase databases were searched. The risk of bias was rated using the Newcastle Ottawa scale for case-control studies.

RESULTS

Ten articles were included in the qualitative analysis. The risk of bias ranged from low to moderate. Low to moderate evidence shows that patients with tinnitus experience higher mean symptom intensity, but lower psychosocial and cognitive distress, compared to patients with pain. Inconsistent results were found for tinnitus-related factors. Low to moderate evidence points to a higher severity of hyperacusis and psychosocial distress in patients with both pain and tinnitus, compared to patients with tinnitus only, as well as for positive associations between tinnitus-related factors and the presence or intensity of pain.

CONCLUSION

This systematic review shows that psychosocial dysfunctions are more clearly present in patients with pain only, compared to patients with tinnitus only and the co-occurrence of tinnitus and pain increases psychosocial distress as well as hyperacusis severity. Some positive associations were identified between tinnitus-related and pain-related factors.

Psychosocial resources predict frequent pain differently for men and women: A prospective cohort study

INTRODUCTION

Psychosocial resources, psychological and social factors like self-efficacy and social support have been suggested as important assets for individuals with chronic pain, but the importance of psychosocial resources for the development of pain is sparsely examined, especially sex and gender differences. The aim of this study was to investigate associations between psychosocial resources and sex on the development of frequent pain in a general population sample, and to deepen the knowledge about sex and gender patterns.

METHODS

A sample from the Swedish Health Assets Project, a longitudinal cohort study, included self-reported data from 2263 participants, 53% women, with no frequent pain at baseline. The outcome variable was frequent pain at 18-months follow-up. Psychosocial resources studied were general self-efficacy, instrumental and emotional social support. Log binomial regressions in a generalised linear model were used to calculate risk ratios (RRs), comparing all combinations of men with high psychosocial resources, men with low psychosocial resources, women with high psychosocial resources and women with low psychosocial resources.

RESULTS

Women with low psychosocial resources had higher risk of frequent pain at follow-up compared to men with high resources: general self-efficacy RR 1.82, instrumental social support RR 2.33 and emotional social support RR 1.94. Instrumental social support was the most important protective resource for women, emotional social support was the most important one for men. Results were discussed in terms of gender norms.

CONCLUSIONS

The psychosocial resources general self-efficacy, instrumental and emotional support predicted the risk of developing frequent pain differently among and between men and women in a general population sample. The results showed the importance of studying sex and gender differences in psychological and not least social predictors for pain.

Preoperative anxiolytic and antidepressant medications as risk factors for increased opioid use after total knee arthroplasty: a matched retrospective cohort analysis

INTRODUCTION

Previous literature has suggested that the presence of anxiety or depression may be linked to increased postoperative pain. The objective of this retrospective analysis was to assess whether patients who use anxiolytics or antidepressants preoperatively were associated with worse acute pain outcomes after elective total knee arthroplasty (TKA).

MATERIAL AND METHODS

A chart review of patients who underwent TKA at our institution was conducted. The primary outcome was mean opioid use in oral morphine equivalents (OME) on the day of surgery (POD 0) through postoperative day 1 (POD1). Secondary outcomes included median pain scores during hospitalization, the need for an acute pain service (APS) consultation, and mean length of stay. Patients were matched (1 : 1) according to multiple factors including age, surgical anaesthesia type, preoperative pain scores, and placement of a single-injection adductor canal block.

RESULTS

83 patients were successfully matched in each group. During POD0-1, patients with anxiolytic or antidepressant prescriptions required a mean of 101.36 mg OME (SD = 66.89), compared to 86.78 mg (SD = 62.66) among patients without use of these medications ( P = 0.011) (estimate of average treatment effect of +22.86). Similarly, these patients were more likely to report a slightly higher median pain score than patients not taking anxiolytics or antidepressants (4.00 [SD 1.95] vs. 3.77 [SD 2.01], P = 0.031) (estimate of average treatment effect of +0.55). However, there were no differences in hospital length of stay, acute pain service consultation, visit to an Emergency Department within one week of discharge, and readmission within one week of discharge. There were also no differences in outcomes when comparing patients with a history of anxiety or depression to those without this history.

CONCLUSIONS

The use of chronic anxiolytics or antidepressants was associated with increased opioid use and slightly higher pain scores in patients undergoing TKA. These associations were independent of a medical diagnosis of anxiety or depression. The mode-rate increase in perioperative opioid consumption and pain scores was not associated with an increase in APS consultations or length of stay.

Disability and return to work after a multidisciplinary intervention for (sub)acute low back pain: A systematic review

Objective

This systematic review aimed to examine pain, functional status and return to work after a multidisciplinary intervention, with or without additional workplace intervention, for (sub)acute low back pain among adults.

Data sources

A comprehensive search was completed (November 2022) in six electronic databases (Embase, MEDLINE, Web of Science, Cochrane, CENTRAL and Scopus) and in the reference list of all identified studies.

Review methods

The search results were screened against predefined eligibility criteria by two independent researchers. Included articles were systematic reviews or randomized controlled trials examining the effect of a multidisciplinary intervention, with or without workplace intervention, in working adults with (sub)acute low back pain. Relevant information was summarized and clustered, and the methodological quality and certainty of evidence were assessed respectively using the RoB 2-tool, the ROBIS tool and the GRADE criteria.

Results

The search resulted in a total of 3020 articles. After the screening process, 12 studies remained (11 randomized controlled trials and 1 systematic review), which studied overall 2751 patients, with a follow-up period of at least 12 months.

Conclusions

A multidisciplinary intervention is favorable compared to usual care for pain intensity and functional status but this is less clear for return to work. Comparable work-related effects were found when comparing a multidisciplinary intervention with a less extensive intervention, whereas uncertainties exist regarding outcomes of pain intensity and functional status. Furthermore, adding a workplace intervention to usual care and subdividing patients based on work-related characteristics seems beneficial for return to work.

Association of Outpatient Behavioral Health Treatment With Medical and Pharmacy Costs in the First 27 Months Following a New Behavioral Health Diagnosis in the US

IMPORTANCE

Outpatient behavioral health treatment (OPBHT) is an effective treatment for behavioral health conditions (BHCs) that may also be associated with improved medical health outcomes, but evidence regarding the cost-effectiveness of OPBHT across a large population has not been established.

OBJECTIVE

To investigate whether individuals newly diagnosed with a BHC who used OPBHT incurred lower medical and pharmacy costs over 15 and 27 months of follow-up compared with those not using OPBHT.

DESIGN, SETTING, AND PARTICIPANTS

This retrospective cohort study of commercially insured individuals in the US was conducted using administrative insurance claims data for individuals newly diagnosed with 1 or more BHCs between January 1, 2017, and December 31, 2018. Data were examined using a 12-month period before BHC diagnosis and 15- and 27-month follow-up periods. Participants included individuals aged 1 to 64 years who received any OPBHT with or without behavioral medication or who did not receive OPBHT or behavioral medication in the 15 months following diagnosis. Data were analyzed from May to October 2021.

EXPOSURES

Receipt of OPBHT both as a dichotomous variable and categorized by number of OPBHT visits.

MAIN OUTCOMES AND MEASURES

The main outcome was the association between OPBHT treatment and 15- and 27-month medical and pharmacy costs, assessed using a generalized linear regression model with γ distribution, controlling for potential confounders.

RESULTS

The study population included 203 401 individuals, of whom most were male (52%), White, non-Hispanic (75%), and 18 to 64 years of age (67%); 22% had at least 1 chronic medical condition in addition to a BHC. Having 1 or more OPBHT visits was associated with lower adjusted mean per-member, per-month medical and pharmacy costs across follow-up over 15 months (no OPBHT: $686 [95% CI, $619-$760]; ≥1 OPBHT: $571 [95% CI, $515-$632]; P < .001) and 27 months (no OPBHT: $464 [95% CI, $393-$549]; ≥1 OPBHT: $391 [95% CI, $331-$462]; P < .001). Furthermore, almost all doses of OPBHT across the 15 months following diagnosis were associated with lower costs compared with no OPBHT.

CONCLUSIONS AND RELEVANCE

In this cohort study, medical cost savings were associated with OPBHT among patients newly diagnosed with a BHC in a large, commercially insured population. The findings suggest that promoting and optimizing OPBHT may be associated with reduced overall medical spending among patients with BHCs.

Depression, catastrophizing, and poor performance in women with persistent acute low back pain from vertebral compression fractures: A prospective study

BACKGROUND

Research on the multi-faceted characteristics of persistent severe acute lower back pain (LBP) resulting from acute vertebral compression fractures (VCFs) is lacking.

OBJECTIVE

To investigate the psychological and functional status of older patients with persistent severe acute LBP after conservative treatment of VCFs.

METHODS

This prospective study included women aged 50 years and older who had acute VCFs and were admitted to the hospital. Pain intensity, depression, pain catastrophizing, activities of daily living (ADL), muscle strength, and vertebral deformity were assessed on admission. At 2 and 4 weeks post-admission, physical performance tests were performed along with the above measures.

RESULTS

We divided 131 participants into severe (n= 64) and mild (n= 67) groups according to their pain intensity at 4 weeks. Compared to the mild group, the severe group showed significantly higher levels of depression and catastrophizing, with significantly poorer muscle strength and endurance. There were no significant differences in ADL and vertebral deformities between the two groups.

CONCLUSIONS

Our results suggest that older patients with persistent severe acute LBP resulting from VCFs tend to be depressed and pain catastrophizing. Furthermore, persistent severe acute LBP negatively impacts endurance and muscle strength but not ADL.

What influences graduate medical students' beliefs of lower back pain? A mixed methods cross sectional study

BACKGROUND

Low back pain (LBP) is a common condition with substantial associated disability and costs, best understood using a biopsychosocial approach. Research demonstrates that beliefs about LBP are important, with biomedical beliefs influencing practitioner's management and patient recovery. Beliefs about LBP can be inconsistent amongst healthcare and medical students. The aim of this study was to investigate graduate medical student's beliefs of LBP and what influences them.

METHOD

A cross sectional mixed methods study of Phase 1 (first year) and Phase 3 (third and fourth year) current graduate medical students at the University of Warwick (MBChB) was conducted. Participants were recruited via voluntary response sampling. A survey investigated LBP beliefs, utilising the Back Beliefs Questionnaire (BBQ) and Health Care Providers' Pain and Impairment Relationship Scale (HC-PAIRS). Qualitative data was collected on what influences beliefs about the causes and management of LBP, which was analysed descriptively using thematic analysis.

RESULTS

Fifty-seven students completed the questionnaire (61% female), with a mean age of 27.2 years. Eighty two percent of participants reported a history of LBP. Median BBQ scores were 31.5 for phase 1 and 31 for phase 3, with median HC-PAIRS scores of 57 and 60 for phase 1 and phase 3 students respectively. Three main themes emerged from the qualitative data: Sources of influence, influence of personal experience and influence of medical education. Participants discussed single or multiple sources influencing their beliefs about the causes and management of LBP. Another main theme was the influence of experiencing LBP personally or through discussions with family, friends and patients. The final main theme described the influence of medical education, including lectures, seminars and clinical placements.

CONCLUSIONS

The HC-PAIRS and BBQ scores suggest graduate medical students in this sample tended to have positive beliefs about the outcome of LBP and functional expectations of chronic LBP patients, consistent with other healthcare students. The findings from qualitative data suggest how medical students form beliefs about the causes and management of LBP is complex.

Prognostic Factors for Quality of Life After Interdisciplinary Pain Rehabilitation in Patients with Chronic Pain-A Systematic Review

BACKGROUND

Health-related quality of life (hrQoL) is a core outcome in evaluating interdisciplinary pain rehabilitation (IPR). This systematic review aimed to identify prognostic factors for hrQoL at least six months after IPR in chronic pain patients.

METHODS

A systematic search was conducted in MEDLINE, PsycINFO, EMBASE, CINAHL, Web of Science and Cochrane CENTRAL until September 2020. Included were prognostic studies on the outcome hrQoL in adults aged 18 to 67 years with chronic pain (excluding malignancies, systemic-, inflammatory or degenerative joint diseases) who had undergone IPR. Studies were assessed with The Quality in Prognostic Studies-tool. Potential prognostic factors at baseline for the domains pain, psychological and physical functioning were qualitatively synthesized for hrQoL. Grading of Recommendations Assessment, Development and Evaluation was used to evaluate the level of evidence.

RESULTS

Fourteen studies on 6,668 participants (mean age 37.4-52.8 y), with musculoskeletal pain/fibromyalgia and a pain duration ranging between 13.1 and 177.4 months were considered eligible. With a very low certainty of evidence, pain intensity, emotional distress, and physical functioning at baseline were inconsistent for prediction of hrQoL and pain duration was not predictive. With low certainty of evidence, fewer pain sites, lower levels of negative cognitive behavioral factors, and higher levels of positive cognitive behavioral factors predicted a better outcome.

CONCLUSIONS

The overall certainty of evidence was low to very low, making it difficult to reach definitive conclusions at present. Future studies with a predefined core set of predictors investigating hrQoL in patients with chronic pain after IPR are needed.

Effectiveness of multimodal exercises integrated with cognitive-behavioral therapy in working patients with chronic neck pain: protocol of a randomized controlled trial with 1-year follow-up

Background

The etiology of neck pain is multifactorial and includes personal and work-related factors such as age, sex, wrong postures, and repeated strains. Studies based on bio-psychosocial model also link chronic neck pain to psychological factors. Over time, the use of multidisciplinary interventions for chronic neck pain has grown in order to improve disability, pain, and adaptive cognitions and behaviors towards patients’ problems. The objective is to evaluate the effectiveness of an individual-based multidisciplinary rehabilitation program that integrates cognitive-behavioral therapy focused on kinesiophobia with specific exercises in the treatment of patients with chronic neck pain, employed in different working activities.

Methods

A randomized, parallel-group superiority-controlled trial will be conducted with 1-year follow-up. One hundred seventy patients engaged in several working activities (blue collar and white collar workers) will be randomly allocated to either the experimental (receiving a multidisciplinary rehabilitation program combining multimodal exercises with psychologist-lead cognitive-behavioral therapy sessions) or the control group (receiving general care physiotherapy). Both groups will follow individual-based programs once a week for 10 weeks. The main outcome measures will be the Neck Disability Index, the Tampa Scale for Kinesiophobia, the Pain Catastrophizing Scale, a pain numerical rating scale, the Short-Form Health Survey, and the Work Ability Index. Participants will be evaluated before, after training, and after 12 months.

Discussion

Findings may provide empirical evidence on the effectiveness of an individual-based multidisciplinary rehabilitation program on inducing clinically significant and long-term improvements in the disability, pain, psychological factors, and quality of life of workers with chronic neck pain and that these would be maintained in the long term. Hence, this trial might contribute towards refining guidelines for good clinical practice and might be used as a basis for health authorities’ recommendations.

Trial registration

ClinicalTrials.gov NCT04768790. Registered on 24 February 2021

Clinical outcomes one year after a digital musculoskeletal (MSK) program: an observational, longitudinal study with nonparticipant comparison group

Background

The evidence base for the impact of digital health on musculoskeletal (MSK) outcomes is growing, but it is unclear how much digital MSK programs address pain and function in the intermediate and long term.

Methods

This observational study of digital MSK program participants versus nonparticipants (n = 2570) examined pain, function, depression, and anxiety at 3, 6, and 12 months, and health care use at 12 months. The intervention group engaged in a digital MSK program that included exercise, education, and coaching for at least 3 months. The nonparticipant group registered, but never started the program. We collected data in app or by emailed survey at 3, 6, and 12 months after registering for the program. We conducted descriptive analyses and unadjusted and adjusted regression modeling.

Results

The odds ratio of achieving a minimally clinically important difference (MCID) in pain improvement for the intervention versus the nonparticipant group was 1.97 (95% CI: 1.28, 3.02; p = .002) at 3 months, 1.44 (95% CI: 0.91, 2.25; p = .11) at 6 months, and 2.06 (95% CI: 1.38, 3.08; p = .004) at 12 months in adjusted models. The odds ratio of achieving a MCID in functional improvement for the intervention versus the nonparticipant group was 1.56 (95% CI: 1.03, 2.38; p = .01) at 3 months, 1.55 (95% CI: 1.02, 2.37; p = .04) at 6 months, and 1.35 (95% CI: 0.89, 2.06, p = 0.16) at 12 months in adjusted models. For those with moderate to severe depression or anxiety at baseline, we observed statistically significant lower odds of moderate to severe depression or anxiety at 3 months, 6 months, and 12 months for the intervention versus the nonparticipant group in adjusted models (p < .05). At 12 months, the percentage with invasive, imaging, and conservative services was higher for the nonparticipant versus intervention group by 5.7, 8.1, and 16.7 percentage points, respectively (p < 0.05).

Conclusions

A digital MSK program may offer participants sustained improvement in pain, depression, and anxiety with concomitant decreases in health care use.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12891-022-05188-x.

The Influence of the Locus of Control Construct on the Efficacy of Physiotherapy Treatments in Patients with Chronic Pain: A Systematic Review

The biopsychosocial paradigm contemplates the patient's personality traits in physiotherapy treatments for chronic pain. Among these traits, the locus of control has a direct relationship with the person's coping strategies in the face of their health problems. The objective of this systematic review was to assess the influence of locus of control on the efficacy of physiotherapy treatments in patients with chronic pain. A systematic review of the publications of the last ten years in Pubmed, Scopus, Science Direct and Web of Science databases was conducting with the terms physical therapy modalities, chronic pain, internal-external control, self-management, physical therapy and physiotherapy. The inclusion criteria were participants with chronic pain lasting at least three months who have received at least one session of physical therapy; the studies should have collected the patient's locus of control as a prognostic factor at the beginning of physiotherapy treatment; the variables studied should include the pain intensity or clinical variables related to pain. A total of 13 articles were found, of which three were experimental studies and ten were observational studies. The included samples had chronic knee pain, nonspecific back pain, low back pain or neck pain; were people over 65 years of age or patients who had undergone hand surgery. In patients with chronic pain for more than three months, the locus of control construct participates as a predictor of the results of physiotherapy treatment. The presence of an internal locus of control favors better results. The personality traits of the subjects represent an important factor to take into account when planning physiotherapy treatments.

The Lived Experience of Managing HIV and Chronic Pain: Qualitative Interviews with Patients and Healthcare Providers

People living with HIV (PLWH) experience higher rates of comorbid chronic pain conditions compared to the general population. Managing HIV and chronic pain, two stigmatized health conditions, can exacerbate physical and psychological suffering. The current qualitative study was designed to increase our understanding of the experience of living with HIV and chronic pain. Twenty participants were recruited from a hospital-based immunology center to participate in individual in-depth qualitative interviews. The interviews focused on the experience of living with (or managing) chronic pain for PLWH. All interviews were audio recorded, transcribed and double-coded. Several themes emerged from our applied thematic analysis of the transcripts. The primary theme was that pain remained poorly managed among PLWH. Patients engaged in a variety of pain management strategies and described benefits from both traditional pain management interventions (e.g., pharmacology, physical therapy) as well as non-traditional approaches (e.g., medical marijuana, cannabidiol products, and spirituality). Other themes that emerged included barriers related to health insurance and the need to validate the patient pain experience. PLWH and chronic pain described compounding effects of managing two chronic health conditions, including perceived immune system over-activation, heightened awareness of illness, and negative mindset. More research is needed to improve care for those managing these often co-occurring health conditions.

Genetic basis to structural grey matter associations with chronic pain

Structural neuroimaging studies of individuals with chronic pain conditions have often observed decreased regional grey matter at a phenotypic level. However, it is not known if this association can be attributed to genetic factors. Here we employed a novel integrative data-driven and hypothesis-testing approach to determine whether there is a genetic basis to grey matter morphology differences in chronic pain. Using publicly available genome-wide association study summary statistics for regional chronic pain conditions (n = 196 963) and structural neuroimaging measures (n = 19 629-34 000), we applied bivariate linkage disequilibrium-score regression and latent causal variable analyses to determine the genetic correlations (rG) and genetic causal proportion (GCP) between these complex traits, respectively. Five a priori brain regions (i.e. prefrontal cortex, cingulate cortex, insula, thalamus and superior temporal gyrus) were selected based on systematic reviews of grey matter morphology studies in chronic pain. Across this evidence-based selection of five brain regions, 10 significant negative genetic correlations (out of 369) were found (false discovery rate < 5%), suggesting a shared genetic basis to both reduced regional grey matter morphology and the presence of chronic pain. Specifically, negative genetic correlations were observed between reduced insula grey matter morphology and chronic pain in the abdomen (mean insula cortical thickness), hips (left insula volume) and neck/shoulders (left and right insula volume). Similarly, a shared genetic basis was found for reduced posterior cingulate cortex volume in chronic pain of the hip (left and right posterior cingulate), neck/shoulder (left posterior cingulate) and chronic pain at any site (left posterior cingulate); and for reduced pars triangularis volume in chronic neck/shoulder (left pars triangularis) and widespread pain (right pars triangularis). Across these negative genetic correlations, a significant genetic causal proportion was only found between mean insula thickness and chronic abdominal pain [rG (standard error, SE) = -0.25 (0.08), P = 1.06 × 10-3; GCP (SE) = -0.69 (0.20), P = 4.96 × 10-4]. This finding suggests that the genes underlying reduced cortical thickness of the insula causally contribute to an increased risk of chronic abdominal pain. Altogether, these results provide independent corroborating evidence for observational reports of decreased grey matter of particular brain regions in chronic pain. Further, we show for the first time that this association is mediated (in part) by genetic factors. These novel findings warrant further investigation into the neurogenetic pathways that underlie the development and prolongation of chronic pain conditions.

RENaBack: low back pain patients in rehabilitation-study protocol for a multicenter, randomized controlled trial

BACKGROUND

Millions of people in Germany suffer from chronic pain, in which course and intensity are multifactorial. Besides physical injuries, certain psychosocial risk factors are involved in the disease process. The national health care guidelines for the diagnosis and treatment of non-specific low back pain recommend the screening of psychosocial risk factors as early as possible, to be able to adapt the therapy to patient needs (e.g., unimodal or multimodal). However, such a procedure has been difficult to implement in practice and has not yet been integrated into the rehabilitation care structures across the country.

METHODS

The aim of this study is to implement an individualized therapy and aftercare program within the rehabilitation offer of the German Pension Insurance in the area of orthopedics and to examine its success and sustainability in comparison to the previous standard aftercare program. The study is a multicenter randomized controlled trial including 1204 patients from six orthopedic rehabilitation clinics. A 2:1 allocation ratio to intervention (individualized and home-based rehabilitation aftercare) versus the control group (regular outpatient rehabilitation aftercare) is set. Upon admission to the rehabilitation clinic, participants in the intervention group will be screened according to their psychosocial risk profile. They could then receive either unimodal or multimodal, together with an individualized training program. The program is instructed in the clinic (approximately 3 weeks) and will continue independently at home afterwards for 3 months. The success of the program is examined by means of a total of four surveys. The co-primary outcomes are the Characteristic Pain Intensity and Disability Score assessed by the German version of the Chronic Pain Grade questionnaire (CPG).

DISCUSSION

An improvement in terms of pain, work ability, patient compliance, and acceptance in our intervention program compared to the standard aftercare is expected. The study contributes to provide individualized care also to patients living far away from clinical centers.

TRIAL REGISTRATION

DRKS, DRKS00020373 . Registered on 15 April 2020.

Use of Complementary and Integrative Health Therapies Prior to Intensive Functional Restoration in Active Duty Service Members with Chronic Pain

OBJECTIVE

Psychosocial factors are known to predict chronic pain, and the use of complementary and integrative health (CIH) therapies to address pain is emerging among military population. However, conflicting results on pain outcomes warrant additional research. This study aimed to (1) evaluate the benefit of adding a CIH pain management program to standard rehabilitative care (SRC), as compared to SRC alone, as precursor to an intensive functional restoration (FR) program; (2) identify factors that predict improvement in pain outcomes following treatment; and (3) determine the proportion of participants who experience clinically meaningful response.

DESIGN

Pragmatic randomized controlled clinical trial. Participants were randomized to a 3-week course of either SRC alone or SRC+CIH (stage 1), followed by a 3- to 6-week course of FR (stage 2).

SETTING AND SUBJECTS

Active duty service members with chronic pain.

METHODS

Participants completed either SRC alone or SRC+CIH (stage 1), followed by a course of FR (stage 2). Patient-reported and provider-determined outcomes were collected at baseline, after stage 1, and after stage 2. A covariance pattern model with unstructured residual covariance matrix was used to compare treatment arms while accounting for dependency due to repeated measurements.

RESULTS

A total of 210 service members participated. Most were Army (82%) and male (84%). Participants randomized to the SRC+CIH intervention had greater improvement in the pain impact score than those in the SRC alone group. Predictors of outcomes were baseline impact score, anger, depression, and educational status.

CONCLUSIONS

This study found that military service members with the highest pain impact benefit the most from interdisciplinary pain care.

Older Adult Use and Outcomes in a Digital Musculoskeletal (MSK) Program, by Generation

Objective: We investigated use and clinical outcomes in a digital musculoskeletal (MSK) program, by generation.

Method: This longitudinal study uses retrospective data collected online or by app. The study included adults with 12 or more weeks of pain who took part in a digital MSK program. We compared Gen Z and Millennials, Gen X, working age Baby Boomers, and retiree age Baby Boomer and Silent Generation. Program use outcomes were program start, program completion, and number of exercises, educational articles, and messages to coaches. Clinical outcomes were changes in pain, depression, and anxiety from baseline to 12 weeks. We calculated descriptive statistics and conducted adjusted regression models.

Results: Odds of starting the program were significantly higher for Gen Xers (OR: 1.12) and working age Baby Boomers (OR: 1.37) vs. Gen Zers and Millennials. Compared to Gen Zers and Millennials, we observed significantly higher odds of program completion among Gen Xers (OR: 1.62), working age Baby Boomers (OR: 2.24), and retirees (OR: 2.36). Compared to Gen Zers and Millennials, retirees had 19 more exercise sessions (IRR: 1.69), accessed 11 more articles (IRR: 1.84), and sent 4 more messages to coaches (IRR: 1.26). Compared to Gen Z and Millennials, we observed no significant differences in change in pain for Gen Xers, working age Baby Boomers, or retirees.

Conclusions: Adults from multiple generations took part in a digital MSK program. Findings suggest that older generations used a digital MSK program more than younger generations, but had similar pain outcomes.

The influence of a MOBile-based video Instruction for Low back pain (MOBIL) on initial care decisions made by primary care providers: a randomized controlled trial

BACKGROUND

Adherence to guidelines for back pain continues to be a challenge, prompting strategies focused on improving education around biopsychosocial frameworks.

OBJECTIVE

Assess the influence of an interactive educational mobile app for patients on initial care decisions made for low back pain by the primary care provider. The secondary aim was to compare changes in self-reported pain and function between groups.

METHODS

This was a randomized controlled trial involving patients consulting for an initial episode of low back pain. The intervention was a mobile video-based education session (Truth About Low Back Pain) compared to usual care. The app focused on addressing maladaptive beliefs typically associated with higher risk of receiving low-value care options. The primary outcome was initial medical utilization decisions made by primary care practitioners (x-rays, MRIs, opioid prescriptions, injections, procedures) and secondary outcomes included PROMIS pain interference and physical function subscales at 1 and 6 months, and total medical costs.

RESULTS

Of 208 participants (71.2% male; mean age 35.4 years), rates of opioid prescriptions, advanced imaging, analgesic patches, spine injections, and physical therapy use were lower in the education group, but the differences were not significant. Total back-related medical costs for 1 year (mean diff = $132; P = 0.63) and none of the 6-month PROMIS subscales were significantly different between groups. Results were no different in opioid-naïve subjects. Instead, prior opioid use and high-risk of poor prognosis on the STarT Back Screening Tool predicted 1-year back pain-related costs and healthcare utilization, regardless of intervention.

CONCLUSION

Factors that influence medical treatment decisions and guideline-concordant care are complex. This particular patient education approach directed at patients did not appear to influence healthcare decisions made by primary care providers. Future studies should focus on high-risk populations and/or the impact of including the medical provider as an active part of the educational process.

TRIAL REGISTRATION

clinicaltrials.gov NCT02777983 .

The anatomy of pain and suffering in the brain and its clinical implications

Pain is an unpleasant sensory and emotional experience associated with actual or potential tissue damage. Chronic pain, with a prevalence of 20-30 % is the major cause of human suffering worldwide, because effective, specific and safe therapies have yet to be developed. It is unevenly distributed among sexes, with women experiencing more pain and suffering. Chronic pain can be anatomically and phenomenologically dissected into three separable but interacting pathways, a lateral 'painfulness' pathway, a medial 'suffering' pathway and a descending pain inhibitory pathway. One may have pain(fullness) without suffering and suffering without pain(fullness). Pain sensation leads to suffering via a cognitive, emotional and autonomic processing, and is expressed as anger, fear, frustration, anxiety and depression. The medial pathway overlaps with the salience and stress networks, explaining that behavioural relevance or meaning determines the suffering associated with painfulness. Genetic and epigenetic influences trigger chronic neuroinflammatory changes which are involved in transitioning from acute to chronic pain. Based on the concept of the Bayesian brain, pain (and suffering) can be regarded as the consequence of an imbalance between the two ascending and the descending pain inhibitory pathways under control of the reward system. The therapeutic clinical implications of this simple pain model are obvious. After categorizing the working mechanisms of each of the available treatments (pain killers, psychopharmacology, psychotherapy, neuromodulation, psychosurgery, spinal cord stimulation) to 1 or more of the 3 pathways, a rational combination can be proposed of activating the descending pain inhibitory pathway in combination with inhibition of the medial and lateral pathway, so as to rebalance the pain (and suffering) pathways.

Pain Appraisals in Patients with Physical Injury: Assessing the Role of Distress Tolerance in the Relationship between Depression and Pain Catastrophizing

Pain is a complex construct contributing to significant impairment, particularly among physically injured patients seeking treatment in trauma and orthopedic surgery settings in which social workers are an integral component of care. The biopsychosocial theory, fear-avoidance, and cognitive mediation models of pain suggest that psychological factors (for example, depression) affect one's ability to tolerate distress, leading to negative pain appraisals, such as catastrophizing. This study examined whether distress tolerance serves as a mechanism by which depression is associated with pain catastrophizing. We administered a health survey to outpatient trauma and orthopedic surgery clinic patients who were using opioid medications; 84 patients were included in the final analysis; 39.3 percent screened positive for depression. A multilevel mediation model using structural equation modeling revealed a significant direct effect from depression to pain catastrophizing (ß = .31, z = 3.96, p < .001) and a significant indirect effect by distress tolerance (Δß = .27, z = 3.84, p < .001). These results, which suggest that distress tolerance partially mediated the path from depression to pain catastrophizing, can inform social workers and other members of the multidisciplinary team about both the critical role of psychosocial factors after injury and interventions to improve postinjury recovery.

Agreement and screening accuracy between physical therapists ratings and the Ӧrebro Musculoskeletal Pain Questionnaire in screening for risk of chronic pain during Musculoskeletal evaluation

Introduction: Identifying patients at risk for chronic musculoskeletal pain can inform evaluation and treatment decisions. The ability of physical therapists to assess patients' risk for chronic pain without use of validated tools has been questioned. The Ӧrebro Musculoskeletal Pain Questionnaire (OMPQ) is used to determine risk for chronic pain.Methods: The aim of this pragmatic study was to prospectively quantify the agreement between physical therapists' assessment of patients' risk for chronic symptoms compared to the OMPQ. Patients were asked to complete the OMPQ during the initial visit. Physical therapists, blinded to OMPQ risk classification, carried out their usual patient assessment procedures. The physical therapists rated patients as either high or low risk for chronic pain based on their clinical assessment. Agreement between therapist and OMPQ was determined using Cohen's Kappa (κ) and screening accuracy compared clinician risk to the OMPQ risk classification (reference standard) by way of contingency table analysis.Results: Ninety-six (96) patients' risk classifications and 15 corresponding physical therapists' risk estimates were available for analysis. The OMPQ identified a 47% prevalence for high risk of chronic pain. Agreement (κ and 95% confidence interval) between physical therapist rating and OMPQ was slight, κ = 0.272 (0.033-0.421), p = .026. Therapists' sensitivity and specificity (95% CI) for determining risk classifications were 60.0% (44.3-74.3) and 62.8% (48.1-75.6), respectively. The positive and negative likelihood ratios (95% CI) were 1.61 (1.05-2.47) and 0.64 (0.42-0.97).Discussion: The use of validated self-report questionnaires are recommended to supplement clinician prognosis for patients at risk of chronic musculoskeletal pain.

Cognitive, emotional, and somatosensory behavior in professional dancers with acute and chronic pain

BACKGROUND

Dance has been linked in a complex manner to pain and the physical and psychological peculiarities of this discipline could influence pain perception and chronicity of pain.

OBJECTIVE

To determine the differences in cognitive, emotional, and somatosensory symptoms between dancers with acute versus chronic pain.

DESIGN

A cross-sectional study of professional dancers with pain.

SETTING

Higher conservatory of dance.

PARTICIPANTS

Thirty-four professional dancers experiencing pain were included. The cohort was divided into two subgroups: those with acute pain (<3 months duration) and those with chronic pain (>3 months duration).

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Pain intensity (as measured by the visual analogue scale or VAS), pressure pain threshold (PPT), Pain Catastrophizing Scale (PCS), pain-related fear of movement (Tampa Scale of Kinesiophobia [TSK-11]), fear avoidance beliefs (Fear-Avoidance Beliefs Questionnaire [FABQ]), self-efficacy (Chronic Pain Self-Efficacy Scale [CPSS]). and chronic pain severity (Chronic Pain Graded Scale [CPGS]).

RESULTS

Dancers with chronic pain reported higher levels of pain intensity in daily activities (p < .01; t = 3.42; d = 1.17) and during exercise/dance (p = .02; t = 2.82; d = 0.82), as well as lower PPT in lumbar (p = .03; t = 3.22; d = 1.1) and tibialis regions (p = .01; t = 2.51; d = 0.86). Dancers with acute pain experienced worse psychological symptoms indicated by the fear of harm subscale of TSK-11 (p = .04; t = -2.08; d = 0.72), physical activity subscale of FABQ (p = .03; t = -2.27; d = 0.78), and pain management subscale of CPSS (p = .01; t = -2.76; d = 0.94) and lower scores for CPGS scale (p = .01; t = 2.99; d = 0.7 to 1.26).

CONCLUSIONS

The results showed differences in pain intensity and PPT revealing higher values in dancers with chronic pain. It is possible that the physical and psychological characteristics of dancers, as well as the sociocultural aspects of this discipline, could influence the way in which this population interprets pain.

Effects of Chronic Pain Treatment on Altered Functional and Metabolic Activities in the Brain: A Systematic Review and Meta-Analysis of Functional Neuroimaging Studies

Previous studies have identified altered brain changes in chronic pain patients, however, it remains unclear whether these changes are reversible. We summarized the neural and molecular changes in patients with chronic pain and employed a meta-analysis approach to quantify the changes. We included 75 studies and 11 of these 75 studies were included in the activation likelihood estimation (ALE) analysis. In the 62 functional magnetic resonance imaging (fMRI) studies, the primary somatosensory and motor cortex (SI and MI), thalamus, insula, and anterior cingulate cortex (ACC) showed significantly decreased activity after the treatments compared to baseline. In the 13 positron emission tomography (PET) studies, the SI, MI, thalamus, and insula showed significantly increased glucose uptake, blood flow, and opioid-receptor binding potentials after the treatments compared to baseline. A meta-analysis of fMRI studies in patients with chronic pain, during pain-related tasks, showed a significant deactivation likelihood cluster in the left medial posterior thalamus. Further studies are warranted to understand brain reorganization in patients with chronic pain compared to the normal state, in terms of its relationship with symptom reduction and baseline conditions.

Back Pain in Outer Space

Space travel has grown during the past 2 decades, and is expected to surge in the future with the establishment of an American Space Force, businesses specializing in commercial space travel, and National Aeronautics and Space Administration's planned sustained presence on the moon. Accompanying this rise, treating physicians are bracing for a concomitant increase in space-related medical problems, including back pain. Back pain is highly prevalent in astronauts and space travelers, with most cases being transient and self-limiting (space adaptation back pain). Pathophysiologic changes that affect the spine occur during space travel and may be attributed to microgravity, rapid acceleration and deceleration, and increased radiation. These include a loss of spinal curvature, spinal muscle atrophy, a higher rate of disc herniation, decreased proteoglycan and collagen content in intervertebral discs, and a reduction in bone density that may predispose people to vertebral endplate fractures. In this article, the authors discuss epidemiology, pathophysiology, prevention, treatment, and future research.

Multidisciplinary program based on early management of psychological factors reduces disability of patients with subacute low back pain. Results of a randomised controlled study with one year follow-up

BACKGROUND

Multidisciplinary rehabilitation induces disability improvement, pain reduction and favours return-to-work in patients with subacute low back pain (LBP). Current research advises additional high-quality trials.

AIM

To test the effect of a multidisciplinary rehabilitative programme incorporating cognitivebehavioural interventions compared to general physiotherapy alone to treat subacute LBP, and to appraise its long-term extent.

DESIGN

Randomised parallel-group superiority-controlled trial.

SETTING

Outpatient rehabilitation hospital.

POPULATION

150 patients with subacute LBP.

METHODS

Patients were assigned randomly to a 10-week individual-based multimodal programme of task-oriented exercises integrated with cognitive-behavioural therapy (experimental group, 75 patients) or individual-based general physiotherapy (control group, 75 patients). Before treatment, 10 weeks later (post-treatment), and 12 months after treatment, the staff administered the Oswestry Disability Index (ODI, primary outcome), a pain intensity numerical rating scale (NRS), the Tampa Scale for Kinesiophobia (TSK), the Pain Beliefs and Perception Inventory (PBAPI), the Hospital and Anxiety Depression Score (HADS) and the Coping Strategies Questionnaire-revised (CSQ-R). Linear mixed model analysis for repeated measures was carried out for each outcome measure.

RESULTS

Significant group (p<0.001), time (p=0.002), and time-by-group interaction (p<0.001) effects were found for ODI, with a between-group difference (standard error) after training of 11.5 (1.0) and at follow-up of 15.7 (0.9), in favour of the experimental group. A significant interaction effect (p<0.001) was found for all secondary outcome measures, with significantly greater improvements in the experimental group, after rehabilitation and at follow-up.

CONCLUSIONS

The multidisciplinary intervention was superior to general physiotherapy in reducing disability, pain, psychological factors and coping strategies of patients with subacute LBP. The effects were reinforced after one year.

CLINICAL REHABILITATION IMPACT

Treatment of subacute LBP requires cognitive modifications closely linked to physical performances in order to achieve mental adjustments and guarantee cognitive-behavioural and motor lasting changes.

Bodily pain in survivors of acute respiratory distress syndrome: A 1-year longitudinal follow-up study

PURPOSE

Acute respiratory distress syndrome (ARDS) survivors frequently experience bodily pain during recovery after the intensive care unit. Longitudinal course, risk factors and associations with physical and neuropsychological health is lacking.

METHODS

We collected self-reported pain using the Short Form-36 Bodily Pain (SF-36 BP) scale, normalized for sex and age (range: 0-100; higher score = less pain), along with physical and mental health measures in a multi-center, prospective cohort of 826 ARDS survivors at 6- and 12-month follow-up. We examined baseline and ICU variables' associations with pain via separate unadjusted regression models.

RESULTS

Pain prevalence (SF-36 BP ≤40) was 45% and 42% at 6 and 12 months, respectively. Among 706 patients with both 6- and 12-month data, 34% reported pain at both timepoints. Pre-ARDS employment was associated with less pain at 6-months (mean difference (standard error), 5.7 (0.9), p < 0.001) and 12-months (6.3 (0.9), p < 0.001); smoking history was associated with greater pain (-5.0 (0.9), p < 0.001, and - 5.4 (1.0), p < 0.001, respectively). In-ICU opioid use was associated with greater pain (-6.3 (2.7), p = 0.02, and - 7.3 (2.8), p = 0.01, respectively). At 6 months, 174 (22%) patients reported co-occurring pain, depression and anxiety, and 227 (33%) reported co-occurring pain and impaired physical function.

CONCLUSION

Nearly half of ARDS survivors reported bodily pain at 6- and 12-month follow-up; one-third reported pain at both time points. Pre-ARDS unemployment, smoking history, and in-ICU opioid use may identify patients who report greater pain during recovery. Given its frequent co-occurrence, clinicians should manage both physical and neuropsychological issues when pain is reported.

Effectiveness of Pain Neurophysiology Education on Musculoskeletal Pain: A Systematic Review and Meta-Analysis

Objectives

To estimate the effectiveness and safety of Pain Neurophysiology Education (PNE) on pain, disability, and psychological distress at post-intervention and long-term (closest to twelve months after initiating the intervention) in musculoskeletal pain (MSKP).

Methods

Randomized Controlled Trials (RCT) were identified in six engines, reference lists, ClinicalTrials.gov, and by contacting key researches. Risk of bias was assessed using Cochrane Collaboration Risk of Bias Tool 2.0. Meta-analyses, using Restricted Maximum Likelihood Method, were conducted to estimate standardized mean differences (SMD) and overall quality of evidence was evaluated according to GRADE.

Results

In total, 18 RCTs (n = 1,585) were included. There was small to moderate effects of PNE on pain at post-intervention and long-term: SMD = -0.32 (95% confidence interval [CI]: −.58; −.05) and SMD = −0.40 (95% CI: −.78; −.03), respectively. On disability, PNE had a small effect at post-intervention: SMD = -0.17 (95% CI: −.34; −.01) but was insignificant at long-term: SMD = −0.27 (95% CI: −.59; .06). Likewise, there was a small to moderate effect on psychological distress at post-intervention: SMD = −0.36 (95% CI: −.67; −.06) but was insignificant at long-term: SMD = −0.37 (95% CI: −.75; .01). Quality of evidence was low across all outcomes. Additional analyses showed significant effects of PNE, corresponding to moderate effects, on pain and psychological distress at both time points in chronic MSKP.

Conclusions

Overall quality of evidence was low, supporting PNE being safe and having small to moderate effects on pain at both time points, and on disability as well as psychological distress at post-intervention.