Pain-related Interference Research Articles

MMPI-2-RF Profiles of Treatment-Seeking Veterans in a VA Pain Clinic and Associations with Markers of Physical Performance.

Chronic pain is a debilitating condition for many military Veterans and is associated with posttraumatic stress disorder (PTSD). This study examined the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF) in 144 Veterans (88.2% male, mean age = 57.95years) recruited from a VA outpatient pain clinic and associations with self-reported pain severity, pain-related interference in daily activities, prescription opioid use, and objective metrics of physical performance on tasks impacted by pain (walking, stair climbing, grip strength, indexed by a single latent variable). Among the cohort with valid responses on the MMPI-2-RF (n = 117) and probable PTSD, mean Somatic Complaints (RC1) and Ideas of Persecution (RC6) scores were clinically elevated. All MMPI-2-RF scales were more strongly correlated with self-reported pain interference than severity. Regressions revealed associations between self-rated pain interference (but not pain or PTSD severity) and physical performance scores (β = .36, p = .001). MMPI-2-RF overreporting Validity and Higher-Order scales contributed incremental variance in predicting physical performance, including Infrequent Psychopathology Responses (β = .33, p = .002). PTSD severity was associated with prescription opioid use when accounting for the effects of over-reported somatic and cognitive symptoms (odds ratio 1.05, p ≤ .025). Results highlight the role of symptom overreporting and perceptions of functional impairment to observable behaviors among individuals with chronic pain.

Social activity diversity as a lifestyle factor to alleviate loneliness and chronic pain

ObjectiveThis study examined whether social activity diversity, a novel concept indicating an active social lifestyle, is associated with lower subsequent loneliness, and decreased loneliness is further associated with less chronic pain over time. Methods2528 adults from the Midlife in the United States Study (Mage = 54 yrs) provided data at baseline (2004–2009) and 9 years later. Social activity diversity was operationalized by Shannon's entropy that captures the variety and evenness of engagement across 13 social activities (0–1). Participants reported feelings of loneliness (1–5), presence of any chronic pain (yes/no), the degree of chronic pain-related interference (0−10), and the number of chronic pain locations. Indirect associations of social activity diversity with chronic pain through loneliness were evaluated, adjusting for sociodemographics, living alone, and chronic conditions. ResultsHigher social activity diversity at baseline (B = -0.21, 95%CI = [−0.41, −0.02]) and an increase in social activity diversity over time (B = -0.24, 95%CI = [−0.42, −0.06]) were associated with lower loneliness 9 years later. An increase in loneliness was associated with 24% higher risk of any chronic pain (95%CI = [1.11, 1.38]), greater chronic pain-related interference (B = 0.36, 95%CI = [0.14, 0.58]), and 17% increase in the number of chronic pain locations (95%CI = [1.10, 1.25]) at the follow-up, after controlling for corresponding chronic pain at baseline and covariates. Social activity diversity was not directly was associated with chronic pain, but there were indirect associations through its association with loneliness. ConclusionDiversity in social life may be associated with decreased loneliness, which in turn, may be associated with less chronic pain, two of the prevalent concerns in adulthood.

Hormonal changes in veterans with Gulf War Illness

AimsGulf War Illness (GWI) is a multi-system condition of complex etiology and pathophysiology without specific treatment. There is an overlap between the symptoms of GWI and endocrinopathies. This study aimed to identify hormonal alterations in 1990–91 Gulf War (GW) veterans and the relationship between GWI and hormonal dysregulation. Main methodsData from 81 GW veterans (54 with GWI and 27 controls without GWI) was analyzed in a cross-sectional, case-control observational study. Participants completed multiple questionnaires, neuropsychiatric assessments, and a comprehensive set of hormone assays including a glucagon stimulation test (GST) for adult growth hormone deficiency (AGHD) and a high-dose adrenocorticotropic hormone (ACTH) stimulation test for adrenal insufficiency. Key findingsThe GWI group had lower quality of life and greater severity of all symptoms compared to controls. Pain intensity and pain-related interference with general activity were also higher in the GWI group. AGHD was observed in 18 of 51 veterans with GWI (35.3 %) and 2 of 26 veterans without GWI (7.7 %) (p = 0.012 for interaction). Veterans with GWI also exhibited reduced insulin-like growth factor 1 (IGF-1) levels and IGF-1 Z-scores compared to controls. One participant with GWI met the criteria for adrenal insufficiency. No significant changes were observed in other hormonal axes. SignificanceThe frequency of AGHD was significantly higher in veterans with GWI compared to controls. Recombinant human growth hormone replacement therapy (GHRT) may become a breakthrough therapeutic option for this subgroup. A large clinical trial is needed to evaluate the efficacy of GHRT in patients with GWI and AGHD.

Interpretation bias in endometriosis-related pain.

Endometriosis-related pain has been predominantly medically managed, which has hindered understanding of psychological factors involved in these pain experiences. Models of chronic pain highlight the biased interpretation of ambiguous information as health threat related (interpretation bias) as an important process in the development and maintenance of chronic pain. Whether interpretation bias may also be similarly implicated in endometriosis-related pain is unclear. The current study aimed to address this gap in the literature by (1) comparing interpretation biases between a sample of participants with endometriosis and a control sample of participants without medical conditions and pain, (2) exploring relationships between interpretation bias and endometriosis-related pain outcomes, and (3) exploring whether interpretation bias moderated the relationship between endometriosis-related pain severity and pain interference. The endometriosis and healthy control samples comprised 873 and 197 participants, respectively. Participants completed online surveys assessing demographics, interpretation bias, and pain-related outcomes. Analyses revealed that interpretation bias was significantly stronger among individuals with endometriosis relative to controls, with a large effect size. Within the endometriosis sample, interpretation bias was significantly associated with increases in pain-related interference, however, interpretation bias was not associated with any other pain outcomes and did not moderate the relationship between pain severity and pain interference. This study is the first to evidence biased interpretation styles among individuals with endometriosis and to show this bias is associated with pain interference. Whether interpretation bias varies over time and whether this bias can be modified through scalable and accessible interventions to alleviate pain-related interference are avenues for future research.

Sleep disturbances are associated with pain intensity and pain-related functional interference in patients experiencing orofacial pain.

Sleep and pain have a reciprocal relationship, interacting with psychosocial aspects including depression, anxiety, somatization and significant stressful events. The aim of this study was to assess patients with oro-facial pain (OFP) and related sleep disturbances and determine the strongest psychosocial correlates. A cross-sectional study of anonymized data of consecutive patients with OFP {January 2019 and February 2020} were analysed. Diagnostic and Axis-II data were integrated to assess the relationship between sleep disturbances, measured using Chronic Pain Sleep Inventory, and demographic factors, clinical comorbidities, recent stressful events, pain severity and pain- and psychological-related function. Five out of six patients with OFP were presented with pain-related sleep disturbances. Sleep problems were enhanced in patients with primary oro-facial headache compared with other OFP conditions. However, once the level of pain intensity and interference was accounted for, primary headache, was not a significant correlate of pain-related sleep disturbances. Multivariate analysis revealed (average) pain severity and pain interference were both significantly associated with sleep problems. There were also significant independent associations of sleep problems with somatization levels and reported experience of recent stressful events. Identifying sleep problems as a part of OFP management may be beneficial and could result in better management outcomes.

Acupuncture versus massage for pain in patients living with advanced cancer: The IMPACT randomized clinical trial.

12101 Background: Pain represents a challenging symptom for patients living with advanced cancer and is often associated with fatigue and insomnia. While American Society for Clinical Oncology clinical guidelines recommend acupuncture and massage for oncological pain management, the long-term comparative effectiveness between these two therapies is unknown, particularly among those living with advanced cancer. Methods: We conducted a pragmatic randomized clinical trial to compare acupuncture and massage for musculoskeletal pain among patients living with advanced cancer who experienced at least moderate pain and had a life expectancy of at least six months. Patients received weekly acupuncture or massage treatments for ten weeks, followed by monthly booster sessions up to 26 weeks. The primary endpoint was the change in worst pain intensity score measured by the Brief Pain Inventory (BPI) from baseline to 26 weeks. The secondary outcomes included pain-related interference (BPI), pain medication usage, patient-reported fatigue, insomnia, and quality of life. Analyses were performed using linear mixed models adhering to intent to treat. Results: Among 298 participants (mean age [SD] 58.7 [14.1] years, baseline worst pain 6.6 [1.5], 67.1% women, 25.9% non-white, 15.4% Hispanic, cancer types [21.5% hematologic, 19.8% breast, 14.4% gynecological, and 11.7% gastrointestinal, 9.7% lung, and 9.7% prostate]), 242 (81.2%) completed the primary endpoint. From baseline to week 26, acupuncture reduced worst pain by 2.53 points (95% CI 2.15-2.92) while massage reduced worst pain by 3.01 points (95% CI 2.63-3.38); the between-group difference was not significant (0.48, 95% CI -0.03-0.98, p = 0.066). Both treatments reduced pain-related interference and pain medication usage and improved comorbid fatigue, insomnia, and quality of life to a similar degree without between-group differences. Adverse events were mild: bruising was reported by 9 (6.5%) acupuncture patients, and transient soreness was reported by 21(15.1%) massage patients and 8 (5.8%) acupuncture patients. Despite receiving close in-person treatment, no known COVID-19 transmission was reported between patients and providers. Conclusions: Among patients living with advanced cancer, acupuncture and massage produced similar clinically meaningful improvements in pain and comorbid fatigue and insomnia, decreased use of pain medications, and improved quality of life. Integrating these non-pharmacological therapies into comprehensive cancer care can improve symptom management and quality of life for the ever-growing number of patients living with advanced cancer as a chronic illness. Clinical trial information: NCT04095234 .

0674 The role of PTSD symptoms in the relationship between sleep quality and pain following Moderate-to-Severe Traumatic Brain Injury

Abstract Introduction Poor sleep quality and chronic pain are common after moderate-to-severe traumatic brain injury (msTBI). Prior studies have not examined the role of PTSD symptoms in the relationship between sleep quality and chronic pain experience (i.e., severity and pain-related interference) in those with msTBI. Yet, PTSD is known to be associated with both sleep and pain. The purpose of this analysis is to determine the role of PTSD symptoms in the sleep-pain relationship among this at-risk clinical population. Methods Secondary analyses were performed on data (n=1537) from the TBI Model Systems follow-up study. Participants were an average age of 46.21 years old, predominantly male (72.61%), and followed at an average of 8.5 years post injury. Participants completed measures of sleep quality (Pittsburgh Sleep Quality Index; PSQI), pain severity and interference (Brief Pain Inventory; BPI), depression (Patient Health Questionnaire-9; PHQ-9) and PTSD symptoms (PTSD Checklist, PCL-5). Analysis of covariance (ANCOVA) was used to examine differences in pain outcomes controlling for relevant covariates, adjusting for item redundancy prior to analyses. Results Sleep quality and pain interference are associated such that “good sleepers” (PSQI≤8, mean=4.92±2.17) have lower pain interference scores than “poor sleepers” (PSQI>8, mean=12.63±2.87), with a mean pain interference of 3.41±2.32 vs 5.26±2.45 (p< 0.0001). “Good sleepers” also had lower pain severity (4.22±1.78 vs 5.28±1.84, p< 0.0001), lower PTSD symptoms (14.62±13.46 vs 28.35±17.82, p< 0.0001), and less depression symptoms (5.32±4.97 vs 10.57±6.22, p< 0.0001) when compared to “poor sleepers.” Pain interference and severity were significantly related to all covariates at a <.001 level. Further, a significant effect of PSQI score cut-off (“good” v “poor sleeper”) in both pain interference and severity remained after controlling for the effect of age, depression, and PTSD symptom scores. Conclusion In patients with msTBI, sleep quality and pain interference are positively associated such that better sleep quality corresponds with lower pain interference, a relationship which remains when controlling for PTSD and multiple covariates. Addressing the sleep needs of patients with msTBI through behavioral intervention (e.g., cognitive behavioral therapy for insomnia), even in the presence of additional psychiatric comorbidities, may assist those who experience chronic pain following injury. Support (if any)

(111) Cognitive Behavioral Therapy and Mindfulness-Based Interventions to Address Sexual Functioning in Women with Cancer: A Systematic Review

Abstract Introduction Research suggests that over 60% of women with cancer report sexual functioning difficulties. Cognitive behavioral therapy (CBT) and mindfulness-based interventions (MBIs) have been used to treat sexual functioning difficulties in women with cancer. Objective The purpose of the current systematic review is to examine the state of the science with regard to the clinical efficacy of these interventions and the mechanisms by which they exert their effects. Methods Following PRISMA guidelines, we conducted a systematic review of randomized controlled trials (RCTs), published in English, testing CBT or MBI to improve sexual functioning in women diagnosed with cancer. Articles were identified using PubMed, Scopus, Cochrane, and PsycInfo using keywords and MeSH terms. Two reviewers independently assessed each article for inclusion, with a third to resolve discrepancies. Results Our search resulted in 1,056 articles, nine of which were eligible for inclusion in the review (6 studied CBT, 2 studied MBI, and 1 combined both CBT and MBI techniques). Sample sizes ranged from 21 to 304. One study included an active psychoeducational control group, while the rest were usual care, wait list control, or provided educational materials. Eight focused on breast cancer, and one on gynecologic cancer. All nine studies reported significant improvements in a measure of sexual functioning. Specifically, 8/9 studies found a difference in overall sexual functioning (e.g., Female Sexual Functioning Index (FSFI), PROMIS Sexual Function and Satisfaction Scale, etc.) relative to control. 4/9 studies tested specific domains of the FSFI (arousal, desire, lubrication, orgasm, satisfaction, and pain). Results varied such that relative to controls: 4/4 studies found significant improvement in arousal, 3/4 studies found significant improvement in desire, 3/4 studies found significant improvement in lubrication, 2/4 studies found significant improvement in orgasm, 2/4 studies found significant improvement in satisfaction, and 1/4 studies found significant improvement in pain. The one study that did find improvement in pain employed an MBI for women with breast cancer at any stage. No studies formally tested mechanisms of change. Conclusions Relatively few studies have assessed CBT and MBIs for sexual function in cancer, despite the large body of research on those interventions for cancer supportive care. However, the majority of the 9 CBT/MBI studies demonstrated efficacy for a range of sexual function outcomes. There was little support for improvement in FSFI pain frequency and severity, suggesting more research is needed to develop interventions to target these dimensions of pain. Additionally, given that both CBT and MBIs often work to change pain-related interference, bother, and distress, future studies should take a more in depth approach to pain assessment. Finally, future studies should aim to include active control groups (e.g., attention control) and test for mechanisms of change. Disclosure No

“I am accustomed to something in my body causing pain”: a qualitative study of knee replacement non-improvers’ stories of previous painful and stressful experiences

BackgroundApproximately 20% of total knee arthroplasty patients experience persistent postsurgical pain one year after surgery. No qualitative studies have explored previous stories of painful or stressful life experiences in patients experiencing persistent postsurgical pain after total knee replacement. This study aimed to explore stories of previous painful or stressful experiences in life in a cohort of patients that reported no improvement in pain one year after total knee arthroplasty.MethodsThe study employed an explorative-descriptive qualitative design. Data was collected through semi-structured interviews five to seven years after surgery, with patients who reported no improvement in pain-related interference with walking 12 months after total knee replacement. The data was analyzed using qualitative content analysis.ResultsThe sample consisted of 13 women and 10 men with a median age of 67 years at the time of surgery. Prior to surgery, six reported having at least one chronic illness and 16 reported having two or more painful sites. Two main themes were identified in the data analysis: Painful years - the burden of living with long lasting pain, and the burden of living with psychological distress.ConclusionsThe participants had severe long lasting knee pain as well as long lasting pain in other locations, in addition to experiences of psychologically stressful life events before surgery. Health personnel needs to address the experience and perception of pain and psychological struggles, and how it influences patients’ everyday life including sleeping routines, work- and family life as well as to identify possible vulnerability for persistent postsurgical pain. Identifying and assessing the challenges enables personalized care and support, such as advice on pain management, cognitive support, guided rehabilitation, and coping strategies both pre-and post-surgery.

Strategies Used to Manage Chronic Pain in HIV-Disease: Comparing Persons Prescribed Opioids Versus Persons not Receiving Opioids.

Chronic pain is common in people living with HIV (PLWH), causes substantial disability and is associated with limitations in daily activities. Opioids are commonly prescribed for pain treatment among PLWH, but evidence of sustained efficacy is mixed. There is little information available on how PLWH who have chronic pain use multimodal strategies in pain management. The current cross-sectional study examined background characteristics, self-reported pain, and the use of other pain treatments among 187 PLWH with chronic pain and depressive symptoms who were and were not prescribed opioids. Approximately 20.9% of participants reported using prescription opioids at the time of the study interview. These individuals were significantly more likely to report having engaged in physical therapy or stretching, strengthening or aerobic exercises in the previous 3 months, recent benzodiazepine use, and receiving disability payments. There were no significant differences in pain characteristics (pain-related interference, average pain severity, and worst pain severity) between the two groups. Those not prescribed opioids were more likely to report better concurrent physical functioning and general health, and fewer physical role limitations, but higher depression symptom severity. Our findings suggest that many PLWH with chronic pain and depressive symptoms express high levels of pain with deficits in physical function or quality of life despite their use of opioids. The high rate of co-use of opioids and benzodiazepines (30.8%) is a concern because it may increase risk of overdose. An integrated care approach that includes a variety of effective non-pharmacologic treatment strategies such as physical therapy may be beneficial in reducing the reliance on opioids for pain management.

Comparing the clinical and cost-effectiveness of remote (telehealth and online) cognitive behavioral therapy-based treatments for high-impact chronic pain relative to usual care: study protocol for the RESOLVE multisite randomized control trial

BackgroundCognitive behavioral therapy for chronic pain (CBT-CP) is an effective but underused treatment for high-impact chronic pain. Increased access to CBT-CP services for pain is of critical public health importance, particularly for rural and medically underserved populations who have limited access due to these services being concentrated in urban and high income areas. Making CBT-CP widely available and more affordable could reduce barriers to CBT-CP use.MethodsAs part of the National Institutes of Health Helping to End Addiction Long-term® (NIH HEAL) initiative, we designed and implemented a comparative effectiveness, 3-arm randomized control trial comparing remotely delivered telephonic/video and online CBT-CP-based services to usual care for patients with high-impact chronic pain. The RESOLVE trial is being conducted in 4 large integrated healthcare systems located in Minnesota, Georgia, Oregon, and Washington state and includes demographically diverse populations residing in urban and rural areas. The trial compares (1) an 8-session, one-on-one, professionally delivered telephonic/video CBT-CP program; and (2) a previously developed and tested 8-session online CBT-CP-based program (painTRAINER) to (3) usual care augmented by a written guide for chronic pain management. Participants are followed for 1 year post-allocation and are assessed at baseline, and 3, 6, and 12 months post-allocation. The primary outcome is minimal clinically important difference (MCID; ≥ 30% reduction) in pain severity (composite of pain intensity and pain-related interference) assessed by a modified 11-item version of the Brief Pain Inventory-Short Form at 3 months. Secondary outcomes include pain severity, pain intensity, and pain-related interference scores, quality of life measures, and patient global impression of change at 3, 6, and 12 months. Cost-effectiveness is assessed by incremental cost per additional patient with MCID in primary outcome and by cost per quality-adjusted life year achieved. Outcome assessment is blinded to group assignment.DiscussionThis large-scale trial provides a unique opportunity to rigorously evaluate and compare the clinical and cost-effectiveness of 2 relatively low-cost and scalable modalities for providing CBT-CP-based treatments to persons with high-impact chronic pain, including those residing in rural and other medically underserved areas with limited access to these services.Trial registrationClinicalTrials.gov NCT04523714. This trial was registered on 24 August 2020.

Responding flexibly to the complex problem of chronic pelvic pain: Incorporating patient needs into program development.

Chronic pelvic pain (CPP) in women is both common and disabling, and access to interdisciplinary care is limited. Patient education programs may represent a pragmatic approach to delivering interdisciplinary care, but to date the specific educational needs of patients with CPP are unknown. We surveyed 136 patients at a tertiary CPP treatment center to identify their educational needs and preferences; 71 (52%) completed surveys. Based on the results, we developed an interdisciplinary educational program, including expert presentations and an extensive participant handbook. We modified our program to a webinar format following the advent of COVID-19. Participants registered for the webinar only or for our study involving completion of three measures of pain-related functioning before and 2 months after the webinar. Our survey results indicated that CPP patients were most interested in learning about the diagnosis and treatment of CPP, coping with CPP, and diet and exercise in the context of CPP; patients also indicated a preference for brief, one-time programs. Of the 164 webinar participants, 64 (39%) enrolled in the study and completed baseline measures; 20 (31%) of those returned follow-up measures 2 months after the webinars. Participants who completed follow-up measures reported significant reduction in pain-related interference; no other significant differences were observed. Participants who completed feedback surveys were positive in their evaluation of the program. Patients with CPP desire more knowledge about their complex symptoms. Addressing their specific needs through educational supports may enhance their ability to manage their symptoms independently. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Following Evidence-Based Recommendations for Perioperative Pain Management after Cesarean Section Is Associated with Better Pain-Related Outcomes: Analysis of Registry Data.

Women who have had a Cesarean Section (CS) frequently report severe pain and pain-related interference. One reason for insufficient pain treatment might be inconsistent implementation of evidence-based guidelines. We assessed the association between implementing three elements of care recommended by guidelines for postoperative pain management and pain-related patient-reported outcomes (PROs) in women after CS. The analysis relied on an anonymized dataset of women undergoing CS, retrieved from PAIN OUT. PAIN OUT, an international perioperative pain registry, provides clinicians with treatment assessment methodology and tools for patients to assess multi-dimensional pain-related PROs on the first postoperative day. We examined whether the care included [i] regional anesthesia with a neuraxial opioid OR general anesthesia with wound infiltration or a Transvesus Abdominis Plane block; [ii] at least one non-opioid analgesic at the full daily dose; and [iii] pain assessment and recording. Credit for care was given only if all three elements were administered (= "full"); otherwise, it was "incomplete". A "Pain Composite Score-total" (PCStotal), evaluating outcomes of pain intensity, pain-related interference with function, and side-effects, was the primary endpoint in the total cohort (women receiving GA and/or RA) or a sub-group of women with RA only. Data from 5182 women was analyzed. "Full" care was administered to 20% of women in the total cohort and to 21% in the RA sub-group. In both groups, the PCStotal was significantly lower compared to "incomplete" care (p < 0.001); this was a small-to-moderate effect size. Administering all three elements of care was associated with better pain-related outcomes after CS. These should be straightforward and inexpensive for integration into routine care after CS. However, even in this group, a high proportion of women reported poor outcomes, indicating that additional work needs to be carried out to close the evidence-practice gap so that women who have undergone CS can be comfortable when caring for themselves and their newborn.

Pain-related interference and pain-related psychosocial factors of three different subgroups of patients with chronic low back pain

BackgroundLow back pain (LBP) subgroup identification and management are a research priority. The clarification of subgroup differences could assist clinicians in clinical decisions contributing to a tailored treatment. ObjectivesTo compare pain-related interference and pain-related psychosocial factors among subgroups of chronic low back pain (localised low back pain, peripheral neuropathic back pain, and widespread pain). DesignCross-sectional study. MethodsA cross-sectional study was conducted on 444 participants with chronic low back pain. Pain-related interference was investigated by the Brief Pain Inventory and Patient-Specific Functional Scale. Pain-related psychosocial factors assessment included psychosocial factors from Brief Screening Questions and maladaptive beliefs from Back Beliefs Questionnaire, self-efficacy, and expectation questions. Participants’ characteristics, pain-related interference, and pain-related psychosocial factors were compared among the three groups. ResultsA one-way ANCOVA presented statistically significant differences among the groups for current pain intensity [F(2,441) = 6.77, p = 0.001], pain duration [F(2,425) = 9.83, p < 0.001], pain-related interference by Brief Pain Inventory [F(2,441) = 11.97, p < 0.001], and pain-related psychosocial factors regarding symptoms of anxiety [F(2,441) = 3.85, p = 0.022], symptoms of depression [F(2,441) = 6.74, p = 0.001], social isolation [F(2,441) = 6.54, p = 0.002], catastrophising [F(2,441) = 9.72, p < 0.001], perceived stress [F(2,441) = 3.93, p = 0.020], maladaptive beliefs [F(2,441) = 6.89, p = 0.001], and expectation [F(2,441) = 6.66, p = 0.001]. ConclusionParticipants with widespread pain presented higher pain-related interference and pain-related psychosocial factors compared to the localised low back pain group. Participants with peripheral neuropathic back pain and widespread pain presented with similar characteristics.

The association of spouse interactions and emotional learning in interference related to chronic back pain

Social interactions affect individual behaviours, preferences, and attitudes. This is also critical in the context of experiencing pain and expressing pain behaviours, and may relate to learned emotional responses. In this respect, individual variability in the medial prefrontal cortex (mPFC), which is involved in adjusting an organism’s behaviour to its environment by evaluating and interpreting information within the context of past experiences, is important. It is critical for selecting suitable behavioural responses within a social environment and may reinforce maladaptation in chronic pain. In our study, we used brain imaging during appetitive and aversive pavlovian conditioning in persons with chronic back pain (CBP), subacute back pain (SABP), and healthy controls (HC), together with information on spouse responses to pain behaviours. We also examined the relationship of these responses with pain-related interference in the patients. Our findings yielded a significant negative association between mPFC responses to appetitive and aversive learning in CBP. We also observed a significant negative association for mPFC responses during aversive learning and distracting spouse responses, and a significant positive association between mPFC responses during appetitive learning and solicitous spouse responses in CBP. Both significantly predicted pain-related interference in the CBP group (explained variance up to 53%). Significant associations were not found for SABP or HC. Our findings support an association between appetitive and aversive pavlovian learning, related brain circuits and spouse responses to pain in CBP, where appetitive and aversive learning processes seem to be differentially involved. This can inform prevention and early intervention in a mechanistic approach.

The PerPAIN trial: a pilot randomized controlled trial of personalized treatment allocation for chronic musculoskeletal pain-a protocol.

The therapy of chronic musculoskeletal pain (CMSP) is complex and the treatment results are often insufficient despite numerous therapeutic options. While individual patients respond very well to specific interventions, other patients show no improvement. Personalized treatment assignment offers a promising approach to improve response rates; however, there are no validated cross-disease allocation algorithms available for the treatment of chronic pain in validated personalized pain interventions. This trial aims to test the feasibility and safety of a personalized pain psychotherapy allocation with three different treatment modules and estimate initial signals of efficacy and utility of such an approach compared to non-personalized allocation. This is a randomized, controlled assessor-blinded pilot trial with a multifactorial parallel arm design. CMSP patients (n = 105) will be randomly assigned 1:1 to personalized or non-personalized treatment based on a cluster assignment of the West Haven-Yale Multidimensional Pain Inventory (MPI). In the personalized assignment condition, patients with high levels of distress receive an emotional distress-tailored intervention, patients with pain-related interference receive an exposure/extinction-tailored treatment intervention and patients who adapt relatively well to the pain receive a low-level smartphone-based activity diary intervention. In the control arm, patients receive one of the two non-matching interventions. Effect sizes will be calculated for change in core pain outcome domains (pain intensity, physical and emotional functioning, stress experience, participant ratings of improvement and satisfaction) after intervention and at follow-up. Feasibility and safety outcomes will assess rates of recruitment, retention, adherence and adverse events. Additional data on neurobiological and psychological characteristics of the patients are collected to improve treatment allocation in future studies. Although the call for personalized treatment approaches is widely discussed, randomized controlled trials are lacking. As the personalization of treatment approaches is challenging, both allocation and intervention need to be dynamically coordinated. This study will test the feasibility and safety of a novel study design in order to provide a methodological framework for future multicentre RCTs for personalized pain psychotherapy. German Clinical Trials Register, DRKS00022792 ( https://www.drks.de ). Prospectively registered on 04/06/2021.

Exploring the contributions of sex and traditionally genderized interpersonal-expressive traits to variability in post-trauma pain ratings.

Multiple intra- and inter-individual variabilities sculpt the experience of pain. However, integration of sex and gender has been under-explored in explanatory models of pain. This study aimed to examine the role of sex and traditionally genderized interpersonal-expressive traits, and their interactions in explaining the variability of pain ratings. Data from 113 participants following acute non-catastrophic musculoskeletal (MSK) injuries were included. Participants completed the Brief Pain Inventory (BPI) and the Gender, Pain and Expectations Scale (GPES). An independent T-test was used to compare differences in BPI subscales between the sexes. Pearson correlations explored the associations between BPI and GPES subscale scores for the overall sample and also for the sample when disaggregated by sex. Multiple linear regression was used to investigate the interaction of sex and gender traits in explaining the BPI scores. No differences were found between the sexes in mean BPI Severity and Interference. Across sexes, Relationship-oriented was positively associated with greater BPI Severity (r = 0.20) and Emotive was positively associated with BPI Interference (r = 0.24). In sex-disaggregated analyses, these associations were significant in females only. Goal-oriented was associated with neither BPI Severity nor Interference. In multivariate regression, only Emotive was a significant predictor of BPI Interference. The findings suggest that variances in pain-related interference are partially explained by scores on a scale measuring self-perceptions of Emotive qualities. Sex was not predictive of either pain outcome in both bivariate and multivariate analyses. Researchers and clinicians are encouraged to consider both sex- and gender-based variables when interpreting patient pain reports.

Analgesic use and favourable patient-reported outcome measures after paediatric surgery: an analysis of registry data

BackgroundPain after paediatric appendectomy and tonsillectomy is often undertreated. Benchmarking of hospitals could reveal which measures are associated with improved patient- or parent-reported pain-related outcomes. MethodsA total of 898 anonymised cases from 11 European hospitals participating in PAIN OUT infant were analysed. The children completed a questionnaire on patient-reported outcomes (PROs) 24 h after surgery. According to a composite PRO measure, including pain intensity and pain-related interference, hospitals were allocated to Group I (favourable results), II (average results), and III (unfavourable results). Benchmarking of hospital groups was performed investigating process variables (dosing of non-opioid analgesics, opioids, and dexamethasone) associated with PROs, side-effects, and children's perception of care. Variables associated with PROs were analysed using multinomial regression analysis with the PRO score-related hospital group as a dependent variable (estimated odds ratios [OR], 95% confidence interval [CI]). ResultsDuring the first 24 h after surgery, 1.2 (1.1–1.3) full daily doses of non-opioid analgesics (non-steroidal anti-inflammatory drug [NSAID], paracetamol, metamizole) were administered in group I and 0.7 (0.6–0.8) in group III (P<0.001). Intraoperative dexamethasone was administered to 70.1 and 52.6% of the children in Group I and Group III, respectively (P<0.001). A lower number of full daily doses of non-opioid analgesics: 0.22 [0.15–0.31]), less dexamethasone (0.49 [0.33–0.71]), fewer non-opioid analgesics before the end of surgery (0.37 [0.22–0.62]) and higher opioid doses were associated with hospital allocation to group III vs group I (Nagelkerke's R2=0.433). ConclusionsThe results indicated substantial deficits in the concept, application, and dosing of analgesics in paediatric patients after surgery. Timely administration of adequate analgesic doses can easily be introduced into daily clinical practice. Clinical trial registrationclinicaltrials.gov NCT 02083835.

Clinical characteristics of early-stage lumbar spondylolysis detected by magnetic resonance imaging in male adolescent baseball players

BackgroundMany adolescent athletes experience low back pain; the most common cause is lumbar spondylolysis. Although early identification of lumbar spondylolysis in adolescent athletes is critical, few studies have focused on identifying the early stages of spondylolysis in baseball players. This study aimed to investigate the clinical characteristics of early-stage spondylolysis in male adolescent baseball players. MethodsThe participants comprised male junior and high school baseball players. Before magnetic resonance imaging, we recorded their demographic data, low back pain characteristics, and physical findings (lumbar flexion, extension, Kemp's test and the provocative tenderness of a spinous process). After the imaging evaluation, the association among low back pain characteristics, physical findings and the final diagnosis (early-stage spondylolysis or not) were investigated using univariate and multivariable analyses. ResultsA total of 171 players were included in this study. Univariate analyses indicated that the characteristics associated with early-stage spondylolysis were longer duration of low back pain (P = 0.0085), low back pain-related interference while running (P = 0.0022), low back pain starting with laterality (P = 0.0001), lumbar extension (P = 0.022), positive Kemp's test (P = 0.020), and the tenderness of a spinous process (P = 0.0003). After adjusting for confounding factors (age and position), we found that early-stage spondylolysis was significantly associated with low back pain duration ≥4 weeks (odds ratio 3.13, 95% confidence interval 1.42–6.92; P = 0.0048), low back pain-related interference while running (odds ratio 2.89, 95% confidence interval 1.30–6.46; P = 0.0094), low back pain starting with laterality (odds ratio 2.78, 95% confidence interval 1.24–6.27; P = 0.0133), and the tenderness of a spinous process (odds ratio 3.00, 95% confidence interval 1.36–6.57; P = 0.0062). ConclusionsMale adolescent baseball players with early-stage spondylolysis might have low back pain duration of more than four weeks, low back pain-related interference while running, and a history of low back pain starting with laterality. The tenderness of a spinous process might be helpful in the diagnosis of early-stage spondylolysis in male adolescent baseball players.

Cognitive-Affective-Behavioral Pathways Linking Adversity and Discrimination to Daily Pain in African-American Adults.

The tendency to ruminate, magnify, and experience helplessness in the face of pain - known as pain catastrophizing - is a strong predictor of pain outcomes and is associated with adversity. The ability to maintain functioning despite adversity - referred to as resilience - also influences pain outcomes. Understanding the extent to which pain catastrophizing and resilience influence relations between adversity and daily pain in healthy African-American adults could improve pain risk assessment and mitigate racial disparities in the transition from acute to chronic pain. This study included 160 African-American adults (98 women). Outcome measures included daily pain intensity (sensory, affective) and pain impact on daily function (pain interference). Adversity measures included childhood trauma exposure, family adversity, chronic burden from recent stressors, and ongoing perceived stress. A measure of lifetime racial discrimination was also included. Composite scores were created to capture early-life adversity (childhood trauma, family adversity) versus recent-life adversity (perceived stress, chronic burden). Increased pain catastrophizing was correlated with increased adversity (early and recent), racial discrimination, pain intensity, and pain interference. Decreased pain resilience was correlated with increased recent-life adversity (not early-life adversity or racial discrimination) and correlated with increased pain intensity (not pain-related interference). Bootstrapped multiple mediation models revealed that relationships between all adversity/discrimination and pain outcomes were mediated by pain catastrophizing. Pain resilience, however, was not a significant mediator in these models. These findings highlight opportunities for early interventions to reduce cognitive-affective-behavioral risk factors for persisting daily pain among African-American adults with greater adversity exposure by targeting pain catastrophizing.