The role of perceived injustice in the experience of chronic pain and disability: scale development and validation

Perceived discrimination, health, and well-being among adults with and without pain: a prospective study

ABSTRACT

Discrimination negatively influences health and well-being in the general population, but its impact on people with pain is unclear. This study assessed discrimination, health, and well-being in people with and without pain. Data were from 5871 participants from the English Longitudinal Study of Ageing. Experiences of discrimination were reported in 2010 to 2011. Pain, self-rated health, depressive symptoms, quality of life, life satisfaction, and loneliness were assessed in 2010 to 2011 and 2016 to 2017. A quarter (26%, n = 1524) of the sample reported pain at baseline. Participants with pain were more likely to report discrimination than those without pain (odds ratio [OR] = 1.28, 95% confidence interval [CI] 1.13-1.46). Cross-sectionally, those with pain who perceived discrimination had poorer self-rated health (OR = 1.28, 95% CI 1.02-1.61), greater depressive symptoms (OR = 1.90, 95% CI 1.48-2.45), were more likely to be lonely (β = 0.21, 95% CI 0.15-0.26), and had lower quality of life (β = -4.01, 95% CI -4.88 to -3.14), and life satisfaction (β = -1.75, 95% CI -2.45 to -1.06) than those with pain who did not perceive discrimination. Prospectively, discrimination in those with pain was associated with greater depression (OR = 1.67, 95% CI 1.19-2.34) and loneliness (β = 0.11, 95% CI 0.05-0.17), adjusting for baseline values. In those without pain in 2010 to 2011, discrimination predicted pain in 2016 to 2017, controlling for covariates (OR = 1.29, 95% CI 1.06-1.56). People with pain are more likely to report discrimination than those without pain, and this experience is associated with increased depression and loneliness. Discrimination was predictive of incident pain in pain-free adults. These findings highlight the need to tackle discrimination to improve well-being in those with pain and to potentially reduce the risk of pain onset.

Examining the association between group context effects and individual outcomes in an interdisciplinary group-based treatment for chronic pain based on Acceptance and Commitment Therapy

Background: Although cognitive-behavioural treatments for chronic pain are delivered in groups, there is little research investigating group effects in these treatments. Purpose: The aim of this study was to investigate associations between group composition variables at the start of treatment and individual outcomes following intensive interdisciplinary treatment for pain based on Acceptance and Commitment Therapy. Methods: This was a secondary analysis of routinely collected observational data. Five-hundred and sixteen patients completed a standard set of demographic, pain-related, and psychosocial measures at pre- and post-treatment. Intracluster correlations (ICCs) were computed to examine the clustering of outcomes within groups and multilevel models explored the association between group composition variables and individual level outcomes. Results: The ICCs for pain intensity (0.11) and interference (0.09) suggested that multilevel models were warranted for these outcomes, while a multilevel model for post-treatment depression (ICC=0.04) was not warranted. Group percentage of participants receiving disability 8 benefits and group mean pain intensity at pre-treatment were significantly positively associated with individual level pain intensity at post-treatment, controlling for pre-treatment individual level pain intensity. Group mean pain intensity at pre-treatment was the only group variable that significantly predicted post-treatment pain interference at the individual level. Psychosocial group composition variables were not significantly associated with individual level outcomes. Conclusions: Given the limited predictive utility of group composition variables in the current study, future research should undertake direct assessment of group level therapeutic and counter-therapeutic processes to advance understanding of who benefits from group treatments for pain and how. As the variance in outcomes accounted for by group clustering was relatively small and significant within groups variance remained, research is also needed to further understand individual level factors that influence cognitive-behavioural treatment outcomes for pain.

Opioid Consumption in Chronic Pain Patients: Role of Perceived Injustice and Other Psychological and Socioeconomic Factors

BACKGROUND

Chronic pain is a complex biopsychosocial phenomenon. Lifestyle, behavioral, socioeconomic, and psychosocial factors such as depression and perceived injustice are often associated with the development of chronic pain and vice versa. We sought to examine the interaction of these factors with opioid intake.

METHODS

At our institution, 164 patients with chronic pain undergoing an interdisciplinary assessment within a three-month period participated in the study and completed the Injustice Experience Questionnaire (IEQ). Data regarding opioid intake, pain levels, pain diagnosis, depression, anxiety, stress, quality of life, pain-related disability, habitual well-being, occupational status, and ongoing workers compensation litigation were extracted from the patients' charts.

RESULTS

Approximately one-fourth of the patients used opioids. The IEQ total was significantly higher in patients using Schedule III opioids. Depression, but not the anxiety and stress scores, were significantly higher in patients using opioids. There were no significant differences regarding pain-related disability, habitual well-being, and the coded psychosocial diagnoses. In the patient group without opioids, the percentage of employed persons was significantly higher but there were no significant differences regarding work leave, pension application, or professional education.

CONCLUSIONS

Opioid use appears to be more closely related to psychological factors and single social determinants of pain than to somatic factors.

Translation and validation of the Norwegian version of the Injustice Experience Questionnaire

OBJECTIVES

Perceived injustice is a theoretical construct comprising elements of loss, attribution of blame, and sense of unfairness. Patients with chronic pain often report high levels of perceived injustice, which can have negative impact on physiological and psychosocial aspects and treatment outcome. The Injustice Experience Questionnaire (IEQ) is a self-report 12-item questionnaire that shows good reliability and validity in patients with chronic pain. This study aimed to translate, validate, and expand the use of the Norwegian Injustice Experience Questionnaire (IEQ-N) to a chronic pain population.

METHODS

A mixed-method approach was used to translate and validate the IEQ-N. It was forward-back translated, linguistically validated, and culturally adapted. Individual cognitive debriefing interviews (n=7) and a focus group interview (n=9) was used to explore the patients' experience with- and understanding of the questionnaire. Statistical descriptive, correlational, factor- and regression analyses were used to investigate the IEQ-N validity, reliability, and factorial structure in a large registry sample (n=3,068) of patients with chronic pain.

RESULTS

Patients with chronic pain found the IEQ-N relevant. Registry analyses supported that the IEQ-N had a one-factor structure. The internal consistency was high (Chronbach's alpha=0.92). The construct validity was good, with moderate to strong significant univariate correlation (r=0.29-0.71) (p<0.05) between perceived injustice and related constructs of pain catastrophizing, pain severity, disability, psychological distress, and quality of life. Perceived injustice contributed with significant but small unique variance to pain-related factors (i.e., pain intensity, pain-related disability, psychological distress), but the additional contribution beyond pain catastrophizing was small (0.2-6.7%) (p<0.05).

CONCLUSIONS

Patients in the study found the questionnaire relevant for their situation, and easy to understand. This study provides a reliable and valid Norwegian tool to assess perceived injustice in patients with chronic pain.

ETHICAL COMMITTEE NUMBER

REK sør-øst, 2016/1942.

Associations between anger and chronic primary pain: a systematic review and meta-analysis

OBJECTIVES

Anger is a negative emotion characterized by antagonism toward someone or something, is rooted in an appraisal or attribution of wrongdoing, and is accompanied by an action tendency to undo the wrongdoing. Anger is prevalent in individuals with chronic pain, especially those with chronic primary pain. The associations between anger and pain-related outcomes (e.g., pain intensity, disability) have been examined in previous studies. However, to our knowledge, no systematic review or meta-analysis has summarized the findings of anger-pain associations through a focus on chronic primary pain. Hence, we sought to summarize the findings on the associations of anger-related variables with pain and disability in individuals with chronic primary pain.

METHODS

All studies reporting at least one association between anger-related variables and the two pain-related outcomes in individuals with chronic primary pain were eligible. We searched electronic databases using keywords relevant to anger and chronic primary pain. Multiple reviewers independently screened for study eligibility, data extraction, and methodological quality assessment.

RESULTS

Thirty-eight studies were included in this systematic review, of which 20 provided data for meta-analyses (2,682 participants with chronic primary pain). Of the included studies, 68.4% had a medium methodological quality. Evidence showed mixed results in the qualitative synthesis. Most anger-related variables had significant positive pooled correlations with small to moderate effect sizes for pain and disability.

CONCLUSIONS

Through a comprehensive search, we identified several key anger-related variables associated with pain-related outcomes. In particular, associations with perceived injustice were substantial.

The Mediating Effect of Perceived Injustice and Pain Catastrophizing in the Relationship of Pain on Fatigue and Sleep in Breast Cancer Survivors: A Cross-Sectional Study

OBJECTIVE

Multidimensional aspects of pain have raised awareness about cognitive appraisals, such as perceived injustice (PI) and pain catastrophizing (PC). It has been demonstrated that they play an important role in patients' pain experience. However, the mediating effect of these appraisals has not been investigated in breast cancer survivors (BCS), nor have they been related to fatigue and sleep.

METHODS

Cross-sectional data from 128 BCS were analysed by structural path analysis with the aim to examine the mediating effect of PI and PC in the relationship of pain on fatigue and sleep.

RESULTS

The indirect mediating effects of PI on fatigue (CSI*PI = 0.21; P < 0.01 and VAS*PI = 1.19; P < 0.01) and sleep (CSI*PI = 0.31; P < 0.01 and VAS*PI = 1.74; P < 0.01) were found significant for both pain measures (Central Sensitization Inventory (CSI) and Visual Analogue Scale (VAS)). PC, on the other hand, only mediated the relationship between pain measured by VAS and fatigue (VAS*PC = 0.80; P = 0.03). Positive associations were found, indicating that higher pain levels are positively correlated with PI and PC, which go hand in hand with higher levels of fatigue and sleep problems.

CONCLUSION

PI is an important mediator in the relationship of pain on fatigue and sleep, while PC is a mediator on fatigue after cancer treatment. These findings highlight that both appraisals are understudied and open new perspectives regarding treatment strategies in BCS.

Poor Sleep Quality and Other Risk Factors for Unemployment Among Patients on Opioid Agonist Treatment

Purpose:

Patients with opioid use disorder (OUD) face high rates of unemployment, putting them at higher risk of treatment nonadherence and poor outcomes, including overdose death. The objective of this study was to investigate sleep quality and its association with other biopsychosocial risk factors for unemployment in patients receiving opioid agonist treatment (OAT) for OUD.

Methods:

Using a cross-sectional survey design, participants from 3 OAT programs for OUD completed questionnaires to measure sleep quality (Pittsburgh Sleep Quality Index [PSQI]); pain disability; catastrophic thinking; injustice experience; quality of life; and self-assessed disability. Spearman’s rank correlation was used to test for associations between sleep quality and other study variables.

Results:

Thirty-eight participants completed the study, with mean age 45.6 ± 10.9 years, 27 (71.1%) males, and 16 (42.1%) reporting a high school diploma/equivalent certification as the highest level of academic attainment. Poor sleep quality (defined as PSQI > 5) was identified in 29 participants (76.3%) and was positively correlated with pain disability (r = 0.657, P < .01), self-assessed disability (r = 0.640, P < .001), symptom catastrophizing (r = 0.499, P < .001), and injustice experience (r = 0.642, P < .001), and negatively correlated with quality of life (r = −0.623, P < .001).

Conclusions:

There was a high prevalence of poor sleep quality in patients with OUD on OAT and this was associated with multiple known risk factors for unemployment. These findings warrant the consideration of regular screening for sleep problems and the inclusion of sleep-related interventions to improve sleep quality, decrease the unemployment rate, and enhance the recovery process for individuals with OUD undergoing OAT.

A Network Analysis of Selected Psychosocial Factors in Vulvodynia and Its Subtypes

OBJECTIVE

Psychosocial factors are related to pain and sex-related outcomes in provoked vulvodynia and possibly in mixed and spontaneous vulvodynia. However, a broader behavioral framework, such as the psychological flexibility model, has received limited attention in this context. Recently, additional psychosocial variables have also emerged that appear relevant to vulvodynia, including perceived injustice, body-exposure anxiety during intercourse, and unmitigated sexual communion. The present study applied network analysis to explore relations between psychological flexibility, newly emerging psychosocial variables relevant to vulvodynia, and their associations with vulvodynia outcomes. The study also explored potential differences across vulvodynia subtypes.

DESIGN

An online cross-sectional study of 349 participants with vulvodynia (112 provoked, 237 spontaneous/mixed) was carried out.

METHODS

Participants completed self-report questionnaires, including questions on pain and sexual outcomes, depression, facets of psychological flexibility, body-exposure anxiety during intercourse, unmitigated sexual communion, and perceived injustice. Networks were computed for the total sample and for provoked and mixed/spontaneous vulvodynia subsamples.

RESULTS

Perceived injustice, pain acceptance, and depression were "central" factors among the included variables, in all models. Psychological flexibility processes were relevant for all networks. Depression was more central in the network for mixed/spontaneous vulvodynia; body-exposure anxiety during intercourse was most central for the provoked subtype.

CONCLUSIONS

Among the included variables, perceived injustice, pain acceptance, depression, and psychological flexibility appear to be important in vulvodynia. As different factors are significant across subtypes, tailored treatment approaches are suggested.

Development of a Questionnaire to Measure the Perceived Injustice of People Who Have Experienced Violence in War and Conflict Areas: Perceived Injustice Questionnaire (PIQ)

Objectives: The primary aim of this research was to develop a questionnaire that assesses perceived injustice among survivors of war and trauma in conflict areas and to evaluate its psychometric properties. This paper presents the first preliminary validation. Furthermore, the assumption that the general perception of injustice correlates with one’s own experiences of injustice and violence was tested. Methods: The 24-item Perceived Injustice Questionnaire (PIQ) was administered partly online and partly in a paper–pencil version to 89 students of the University of Dohuk in Northern Iraq, an area that has been affected by crisis and war for many years. Principal component analysis was used for factor extraction and internal consistency was determined. The Mann–Whitney-U test was used to calculate the group differences between people with and without experience of physical violence and strong experiences of injustice because Kolmogorov–Smirnov tests showed that the data are not normally distributed. Results: Principal component analysis yielded a four-component solution with eigenvalues being the greater one. Cronbach’s alpha for each scale was acceptable to satisfactory. Significant results of the Mann–Whitney U tests supported our assumptions of between-group differences on each of the subscales (emotional and cognitive consequences, injustice perception, injustice experience, revenge, and forgiveness). Discussion: The findings of this study support the construct validity and the reliability of the PIQ. For this reason, it can be seen as a useful addition to the psychological assessment in psychotherapeutic settings of survivors of war and violence. In conclusion, and based on the PIQ, we suggest the development of a new set of therapy modules with worksheets, focusing on the perception, dealing, and understanding of feeling of injustice as an addition to the existing trauma therapy manual for therapy in war and conflict areas.

Injustice Through Cultural Lens: A Pilot Qualitative Exploration of Pain-Related Injustice Appraisals Among Arab-Americans with Chronic Low Back Pain

The current qualitative study sought to obtain an in-depth understanding of how Arab-Americans conceptualize perceived injustice concerning their chronic low back pain (CLBP) by reflecting on the Injustice Experience Questionnaire (IEQ). Twelve Arab-American adults with CLBP were recruited from a metropolitan area in Alabama using a purposive sampling technique. Participants took part in individual, face-to-face, semi-structured interviews reflecting on each statement from the IEQ. Descriptive data analysis was generated for demographic and pain variables. Directed content analysis was conducted to identify themes and sub-themes. 'Blame and unfairness' and 'severity and irreparability of loss,' the 2 established theoretical factors comprising pain-related injustice appraisal were used as predominant themes. Acceptance emerged as an inductive theme with the following sub-themes: positive appraisal and resilience, attempts to reduce pain, religious values and fate, and belief that everything happening for a reason. The influence of religion was noted across all themes. The current pilot findings suggest that Arabic culture, heavily infused with Islamic beliefs, influences how Arab-Americans conceptualize pain-related injustice appraisals. Additional exploration of the cultural appropriateness of the IEQ among individuals of Arab background is needed to further elaborate on the subject of faith and religious belief suggested by the current study. Perspective: Although the study findings largely reflected established injustice literature constructs, several emergent themes regarding pain-related injustice appraisal were influenced by the participants' culture and religious beliefs. These findings may indicate that specific psychotherapeutic approaches that have been proven effective among some groups may not function similarly in other populations.

Cross-Sectional Associations among Components of Injustice Appraisals and Functioning in Adolescents With Chronic Pain

OBJECTIVE

Pain-related appraisals, including pain-related injustice, impact the development and maintenance of chronic pain. This cross-sectional study aimed to examine the relationship between the cognitive-emotional components of pain-related injustice-blame/unfairness and severity/irreparability of loss-and functioning in a mixed sample of adolescents with chronic pain.

METHODS

Pediatric patients age 11-18 years (N = 408) completed forms assessing pain-related injustice, pain intensity, and physical and psychosocial functioning as part of their routine assessment in a pediatric chronic pain clinic between January 2014 and January 2019. A series of hierarchical regressions were used to evaluate the relationships among the separate components of pain-related injustice appraisals and functioning.

RESULTS

Pain intensity and blame/unfairness appraisals were significantly associated with emotional functioning with blame/unfairness being the stronger association (β = -.27). Blame/unfairness appraisals, severity/irreparability appraisals, and pain intensity were significantly associated with physical functioning with pain intensity being the strongest association (β = .36). Pain intensity, blame/unfairness appraisals, and severity/irreparability appraisals were significantly associated with social functioning with blame/unfairness being the strongest association (β = -.34). Pain intensity and severity/irreparability appraisals were significantly associated with school functioning with severity/irreparability being the stronger association (β = -.19).

CONCLUSIONS

These results lend further support to incorporating pain-related injustice appraisals in standard clinical pain assessments. Treatment practices should target the specific injustice appraisals and domains of functioning impacted for each pediatric patient with chronic pain.

Multidimensional Self-report Assessment of Children's Acute Pain in an Inpatient Setting

OBJECTIVE

This study assessed the feasibility of administering a multidimensional, self-report pain assessment protocol to children in an inpatient, acute pain context, and sought insight into the interrelationships between sensory, affective, and evaluative pain dimensions.

METHODS

A total of 132 children (5 to 16 y) experiencing acute pain were recruited from acute pain ward rounds or the short-stay surgical unit. A multidimensional self-report assessment protocol was administered, assessing pain intensity, pain-related affect, bother, perceived unfairness, and pain expectations (for tomorrow and in 1 wk). Duration of protocol administration was assessed and ease of administration was rated. Pain-related behaviors were rated using the Face, Legs, Activity, Cry, and Consolability (FLACC) Scale.

RESULTS

The duration of protocol administration was <2.5 minutes, on average, for all age groups. Median ease of protocol administration was 7/10 for 5- to 7-year-olds and 8/10 for older age groups. Pain-related bother was higher for 14- to 16-year-olds, relative to younger age groups, and significantly correlated with perceived unfairness (r=0.59, P<0.01), intensity (r=0.76, P<0.01), and affect (r=0.33, P<0.05). For younger age groups, bother was significantly positively correlated only with pain intensity (rs=0.59 to 0.79, Ps<0.01) and affect (rs=0.4 to 0.71, Ps <0.05). A stepwise multiple regression analysis found multidimensional self-reported information (especially pain intensity and perceived unfairness), accounted for significant additional amount of variance, beyond that explained by age, pain duration, and observed pain behavior.

DISCUSSION

Sensory, affective, and evaluative aspects of children's clinical, acute pain experience may be assessed using self-report tools, which provide unique and valuable information about their pain experience.

Battle of the Appraisals: Pain-Related Injustice Versus Catastrophizing as Mediators in the Relationship Between Pain Intensity and 3-Month Outcomes in Adolescents with Chronic Pain

Pain appraisals are closely tied to pain and functional outcomes. Pain-related injustice and pain catastrophizing appraisals have both been identified as important cognitive-emotional factors in the pain experience of youth. Although pain-related injustice and catastrophizing have been linked to worse pain outcomes - as primary predictors and intermediary variables - little is known about whether they operate as independent or parallel mediators of the relationship between pain and functioning in youth. We tested pain-related injustice and catastrophizing appraisals as candidate mediators of the relationship between baseline pain intensity and 3-month functional outcomes in adolescents. Youth with chronic pain (N = 89, 76% female, 89% White, average age = 15 years) completed measures assessing pain intensity, pain-related injustice, and catastrophizing at baseline, as well as measures assessing functional disability and overall quality of life 3 months later. Multiple mediation analyses indicated that injustice mediated the relationship between pain intensity and 3 month quality of life. Exploratory analyses of specific quality of life domains indicated that injustice mediated the relationship between pain intensity and 3 month emotional functioning, whereas catastrophizing mediated the relationship between pain intensity and 3 month social functioning. The findings suggest these pain-related appraisals play different intermediary roles in the relationships among pain and future psychosocial outcomes. PERSPECTIVE: Pain-related injustice and catastrophizing appraisals play different intermediary roles in the relationships among pain and future psychosocial outcomes in youth with chronic pain. Treatments targeting pain-related injustice appraisals in pediatric populations are needed to complement existing treatments for catastrophizing.

Anger as a Mechanism of Injustice Appraisals in Pediatric Chronic Pain

Mechanisms explaining the relationship between pain-related injustice appraisals and functional outcomes in youth with chronic pain have yet to be examined. In studies of adults, greater pain-related injustice is associated with worse depressive symptoms and greater pain through greater anger. No study to date has examined anger expression as a mediator in the relationships between pain-related injustice appraisals and physical and psychosocial functioning in youth with chronic pain. The current sample consisted of 385 youth with varied pain conditions (75% female, 88% White, M_age=14.4 years) presenting to a university-affiliated pain clinic. Patients completed self-report measures assessing anger expression (anger-out and anger-in), pain-related injustice, pain intensity, functional disability, and emotional, social, and school functioning. Bootstrapped mediation analyses indicated that only anger-out (indirect effect= -.12, 95% CI: -.21, -.05) mediated the relationship between pain-related injustice and emotional functioning, whereas both anger-out (indirect effect= -.17, 95% CI: -.27, -.09) and anger-in (indirect effect= -.13, 95% CI: -.09, -.001) mediated the relationship between pain-related injustice and social functioning. Neither mode of anger expression mediated the relationship between pain-related injustice and pain intensity, functional disability, or school functioning. Collectively, these findings implicate anger as one mechanism by which pain-related injustice impacts psychosocial outcomes for youth with chronic pain. Perspective: Anger expression plays a mediating role in the relationship between pain-related injustice appraisals and psychosocial outcomes for youth with chronic pain. Anger represents one target for clinical care to decrease the deleterious impact of pain-related injustice on emotional and social functioning.

Perceived Injustice Is Associated With Pain-related Function and Mood in Youth With Acute Musculoskeletal Pain

OBJECTIVES

Perceived injustice (PI), which is one's appraisal of justice or fairness regarding the pain experience, is an emerging area of interest in pediatric pain research. No previous studies have investigated PI in youth with acute pain. To fill this gap, this study examined (1) associations among PI, pain-related function, and psychological function in treatment-seeking youth with acute musculoskeletal (MSK) pain, and (2) the impact of parent-child PI discordance on children's pain and psychosocial function.

MATERIALS AND METHODS

Participants were youth (aged 11 to 17, 55% male) with acute pain (onset <1 mo) recruited from emergency departments or outpatient clinics and participating parents (102 parent-child dyads). Dyads completed study questionnaires within 1 month of the child's pain onset.

RESULTS

Youth-reported PI was significantly correlated with poorer physical and psychosocial quality of life, higher pain catastrophizing, higher fear of pain, increased pain-related disability, and greater depression and anxiety. Furthermore, PI was significantly associated with the physical quality of life, psychosocial quality of life, and pain-related disability. Moreover, discordance in youth and parent ratings of PI was associated with children's psychological and pain-related function. Specifically, compared with Concordant dyads, youth in the Discordant dyads (youth high PI/parent low PI) reported significantly poorer physical quality of life, psychosocial quality of life, higher pain-related disability, depression, anxiety, and pain catastrophizing.

DISCUSSION

These findings reveal that PI in youth with acute MSK pain is associated with quality of life and pain-related disability. Furthermore, results highlight the importance of discordance between youth and parent reports of PI on pain-related functioning.

Psychometric assessment of the Swedish version of the injustice experience questionnaire among patients with chronic pain

OBJECTIVES

The use of the Injustice Experience Questionnaire (IEQ) in psychological assessment of individuals with chronic pain is supported by research. The psychometric properties of the Swedish version, the IEQ-S, has not yet been evaluated. Hence, the aim was to investigate structural validity, and concurrent criterion validity of the IEQ-S against the Work Ability Index (WAI), the Pain Catastrophizing Scale (PCS-SW), the Patient Health Questionnaire 9-item depression module (PHQ-9), and the Generalized anxiety disorder 7-item scale (GAD-7). Internal consistency and test-retest reliability were also studied.

METHODS

Sixty-five participants, referred to a University hospital, with a pain duration over three months were consecutively sampled. They completed the IEQ-S at admission and again within six weeks. A confirmatory factor analysis was performed for the study of structural validity. Concurrent criterion validity was evaluated using Spearman's correlation coefficient. Internal consistency reliability for the full IEQ-S was calculated using the Cronbach's alpha. Test-retest reliability was calculated using an Intraclass Correlation Coefficient (ICC).

RESULTS

The median total score (0-48, where high scores indicate high levels of injustice) at admission (test 1) was 27.0 (n=64), 25th percentile=15.3, 75th percentile=37.8, range=3-48 points. A one-factor model was supported with item-loadings between 0.67-0.92. Spearman's correlation coefficient between the IEQ-S and the WAI (n=56) was r _S =-0.46; the PCS-SW (n=63) was r _S =0.68, the PHQ-9 (n=64) was r _S =0.50 and the GAD-7 (n=64) was r _S =0.57, p<0.01. Cronbach's alpha was 0.94 (n=64). The ICC was 0.80 (n=55), with a 95% confidence interval, ranging between 0.69-0.88.

CONCLUSIONS

Our study supported structural validity and concurrent criterion validity of the IEQ-S against other measures of psychological constructs and work ability. It also supported the internal consistency reliability of the IEQ-S and the test-retest reliability with a retest interval up to six weeks, was good. These findings support the use of the IEQ-S as an adjunct tool to assess appraisals of injustice in patients with chronic pain who are referred to tertiary care in Sweden. The added value might be identification of those who are at risk for slow or no improvement in their pain condition over time, and sick-leave, but this has to be confirmed in future studies.

ETHICAL COMMITTEE NUMBER

EPN Uppsala D-No 2016-376.

The role of psychological flexibility, perceived injustice and body image in Vulvodynia: A longitudinal study

BACKGROUND

Women with Vulvodynia experience pain, related impacts on sex and daily functioning, and depression. While psychosocial factors are associated with outcomes in Vulvodynia, longitudinal data are limited, especially in mixed/spontaneous Vulvodynia. Broad psychological models such as psychological flexibility (PF) and content-specific factors, such as body-exposure anxiety (BEA) and avoidance during sexual activities and perceived injustice, have not been adequately investigated in Vulvodynia. The aim of this study was to explore whether these factors assessed at baseline predict pain severity, pain interference, sexual functioning and satisfaction and depression 3 months later.

METHODS

A longitudinal study of 349 women with Vulvodynia was conducted. Participants completed online self-report measures of pain-related and sexual outcomes, depression, BEA, perceived injustice and facets of PF (present moment awareness, pain acceptance, committed action) at baseline and after 3 months, overlapping with the Coronavirus disease 2019 (COVID-19) pandemic.

RESULTS

Seventy percent of women responded at both assessments (n = 244). There were significant decreases in pain severity, pain interference, present moment awareness, committed action and a significant increase in depression at 3 months. All the baseline psychosocial factors significantly correlated with at least one outcome at 3 months. When adjusting for baseline outcome and demographics, committed action significantly positively predicted depression at 3 months and pain acceptance significantly positively predicted pain interference at 3 months.

CONCLUSIONS

Among women with Vulvodynia, pain acceptance and committed action are prospectively associated with pain interference and depression. The reliability and generalizability of these results needs to be established given the overlap with the COVID-19 pandemic. Future studies should investigate whether targeting these factors enhances outcomes in Vulvodynia.

SIGNIFICANCE

This longitudinal study explored the role of PF, perceived injustice and body image during sexual activities in predicting pain severity, pain interference, sexual functioning, sexual satisfaction and depression in women with Vulvodynia. The study findings reveal that two facets of PF (committed action and pain acceptance) predicted pain interference and depression over time. It may be important to incorporate these processes in treatments developed for Vulvodynia.

Sources of Individual Differences in Pain

Pain is an immense clinical and societal challenge, and the key to understanding and treating it is variability. Robust interindividual differences are consistently observed in pain sensitivity, susceptibility to developing painful disorders, and response to analgesic manipulations. This review examines the causes of this variability, including both organismic and environmental sources. Chronic pain development is a textbook example of a gene-environment interaction, requiring both chance initiating events (e.g., trauma, infection) and more immutable risk factors. The focus is on genetic factors, since twin studies have determined that a plurality of the variance likely derives from inherited genetic variants, but sex, age, ethnicity, personality variables, and environmental factors are also considered.

Validation of the Injustice Experience Questionnaire (IEQ) in a spinal cord injury population

STUDY DESIGN

Retrospective analysis of cross-sectional data.

OBJECTIVES

To verify the factor structure of the Injustice Experience Questionnaire (IEQ) using a sample of individuals with spinal cord injury (SCI) and to assess IEQ scale reliability and construct validity using the same population.

SETTING

Two SCI rehabilitation sites in the United States.

METHODS

Three datasets were combined to conduct this validation study. The sample consisted of 341 adults with SCI who completed the IEQ, measures of psychological distress and pain, and provided sociodemographic and injury-related information. A series of confirmatory factor analyses (CFA) and exploratory factor analyses (EFA) were conducted to verify the two-factor structure of the IEQ, Cronbach's alpha was used to demonstrate scale reliability, and correlations between the IEQ and measures of pain and psychological distress were examined to assess construct validity.

RESULTS

Poor model fit was observed for the two-factor structure of the IEQ as well as for the subsequent factor-structures that were explored. The IEQ demonstrated strong scale reliability (α = 0.89) and correlations between the IEQ and measures of pain and psychological distress were in the expected direction, indicating good construct validity.

CONCLUSIONS

In this preliminary validation study, we failed to confirm the two-factor structure of the IEQ in a population of individuals with SCI. Though good scale reliability and construct validity were observed, further study is needed to refine the IEQ for use in this population.

Perceived Injustice Helps Explain the Association Between Chronic Pain Stigma and Movement-Evoked Pain in Adults with Nonspecific Chronic Low Back Pain

OBJECTIVE

For most patients with chronic low back pain (cLBP), the cause is "nonspecific," meaning there is no clear association between pain and identifiable pathology of the spine or associated tissues. Laypersons and providers alike are less inclined to help, feel less sympathy, dislike patients more, suspect deception, and attribute lower pain severity to patients whose pain does not have an objective basis in tissue pathology. Because of these stigmatizing responses from others, patients with cLBP may feel that their pain is particularly unjust and unfair. These pain-related injustice perceptions may subsequently contribute to greater cLBP severity. The purpose of this study was to examine whether perceived injustice helps explain the relationship between chronic pain stigma and movement-evoked pain severity among individuals with cLBP.

METHODS

Participants included 105 patients with cLBP who completed questionnaires assessing chronic pain stigma and pain-related injustice perception, as well as a short physical performance battery for the assessment of movement-evoked pain and physical function.

RESULTS

Findings revealed that perceived injustice significantly mediated the association between chronic pain stigma and cLBP severity (indirect effect = 6.64, 95% confidence interval [CI] = 2.041 to 14.913) and physical function (indirect effect = -0.401, 95% CI = -1.029 to -0.052). Greater chronic pain stigma was associated with greater perceived injustice (P = 0.001), which in turn was associated with greater movement-evoked pain severity (P = 0.003).

CONCLUSIONS

These results suggest that perceived injustice may be a means through which chronic pain stigma impacts nonspecific cLBP severity and physical function.

What Does CATS Have to Do With Cancer? The Cognitive Activation Theory of Stress (CATS) Forms the SURGE Model of Chronic Post-surgical Pain in Women With Breast Cancer

Chronic post-surgical pain (CPSP) represents a highly prevalent and significant clinical problem. Both major and minor surgeries entail risks of developing CPSP, and cancer-related surgery is no exception. As an example, more than 40% of women undergoing breast cancer surgery struggle with CPSP years after surgery. While we do not fully understand the pathophysiology of CPSP, we know it is multifaceted with biological, social, and psychological factors contributing. The aim of this review is to advocate for the role of response outcome expectancies in the development of CPSP following breast cancer surgery. We propose the Cognitive Activation Theory of Stress (CATS) as an applicable theoretical framework detailing the potential role of cortisol regulation, inflammation, and inflammatory-induced sickness behavior in CPSP. Drawing on learning theory and activation theory, CATS offers psychobiological explanations for the relationship between stress and health, where acquired expectancies are crucial in determining the stress response and health outcomes. Based on existing knowledge about risk factors for CPSP, and in line with the CATS position, we propose the SURGEry outcome expectancy (SURGE) model of CPSP. According to SURGE, expectancies impact stress physiology, inflammation, and fear-based learning influencing the development and persistence of CPSP. SURGE further proposes that generalized response outcome expectancies drive adaptive or maladaptive stress responses in the time around surgery, where coping dampens the stress response, while helplessness and hopelessness sustains it. A sustained stress response may contribute to central sensitization, alterations in functional brain networks and excessive fear-based learning. This sets the stage for a prolonged state of inflammatory-induced sickness behavior - potentially driving and maintaining CPSP. Finally, as psychological factors are modifiable, robust and potent predictors of CPSP, we suggest hypnosis as an effective intervention strategy targeting response outcome expectancies. We here argue that presurgical clinical hypnosis has the potential of preventing CPSP in women with breast cancer.

Pain-Related Injustice Appraisals in Youth with Sickle Cell Disease: A Preliminary Investigation

OBJECTIVES

Sickle cell disease (SCD) is a genetic disorder that affects approximately 100,000 Americans, the majority of whom are African American. SCD-related pain often has deleterious effects on functioning and quality of life. The inherited nature of SCD, SCD-related stigma, and serious physical and functional impact of SCD-related pain create a situation ripe for individuals to appraise their SCD-related pain as unfair or unjust. The aim of this preliminary investigation is to explore the extent to which pediatric patients with SCD appraise their pain as unjust and how these appraisals relate to functioning.

METHODS

Participants were youth with SCD (N = 30, mean age = 11.3, 57% boys) who attended a hematology clinic visit. Patients were invited to complete paper-based questionnaires assessing pain-related injustice appraisals, pain catastrophizing, pain and hurt, functional disability, depression, anxiety, and peer relationships.

RESULTS

Results of hierarchical regressions indicate that pain-related injustice significantly predicted functional disability, depression, and anxiety after controlling for patient pain and catastrophizing.

CONCLUSIONS

These findings suggest that pain-related injustice appraisals are an important contributor to the pain experience of youth with SCD. Early identification and remediation of pain-related injustice appraisals could have long-term functional benefits for youth with SCD.

Predicting the Physical and Mental Health Status of Individuals With Chronic Musculoskeletal Pain From a Biopsychosocial Perspective: A Multivariate Approach

OBJECTIVES

Chronic pain is theoretically conceptualized from a biopsychosocial perspective. However, research into chronic pain still tends to focus on isolated, biological, psychological, or social variables. Simultaneous examination of these variables in the prediction of outcomes is important because communalities between predictors exist. Examination of unique contributions might help guide research and interventions in a more effective way.

METHODS

The participants were 114 individuals with chronic pain (mean age=58.81, SD=11.85; 58.8% women and 41.2% men) who responded to demographics (age and sex), pain characteristics (duration and sensory qualities), psychological (catastrophizing and perceived injustice), and social (marital adjustment) measures. Multivariate analyses were conducted to investigate their unique contributions to pain-related health variables pain severity, pain interference, disability, anxiety, and depressive symptoms.

RESULTS

Bivariate analyses evidenced significant associations between pain sensory qualities, catastrophizing, perceived injustice, and all health variables. In multivariate analyses, pain sensory qualities were associated with pain severity (β=0.10; 95% confidence interval [CI]=0.05, 0.14; t=4.28, P<0.001), while perceived injustice was associated with pain interference (β=0.08; 95% CI=0.03, 0.12; t=3.59, P<0.001), disability (β=0.25; 95% CI=0.08, 0.42; t=2.92, P=0.004), anxiety (β=0.18; 95% CI=0.08, 0.27; t=3.65, P<0.001), and depressive symptoms (β=0.14; 95% CI=0.05, 0.23; t=2.92, P=0.004). Age, sex, pain duration, and marital adjustment were not associated with health variables either in bivariate or in multivariate analyses (all P>0.010).

DISCUSSION

As expected, communalities between biopsychosocial variables exist, which resulted in a reduced number of unique contributions in multivariate analyses. Perceived injustice emerged as a unique contributor to variables, which points to this psychological construct as a potentially important therapeutic target in multidisciplinary treatment of pain.

The mediating effect of pain catastrophizing and perceived injustice in the relationship of pain on health-related quality of life in breast cancer survivors

BACKGROUND

The importance of cognitive appraisals in the effectiveness of pain coping is well established. Two key variables in these appraisal processes are pain catastrophizing (PC) and perceived injustice (PI), which are known to increase the risk of long-term disability and aggravate the pain-related distress through maladaptive behavioral responses. However, to date, the mediating effects of these appraisals have not been examined concurrently in the breast cancer survivor (BCS) population, nor have they been related to health-related quality of life (HRQoL).

METHODS

Using cross-sectional data from 110 BCS, structural path analyses were used to examine the mediating effects of PC and PI in the relationship of pain on the HRQoL in BCS.

RESULTS

Results demonstrated a significant direct effect of pain and PI on HRQoL combined with a significant indirect effect through PI, but not through PC. An increase in pain is suggested to result in a decrease in quality of life. On the other hand, an increase in pain also is suggested to increase the PI. A similar relation with PC was not retained as significant.

CONCLUSION

The relative salience of PI as a mediator of HRQoL underscores the fact that PI is not only understudied but also underappreciated and undertreated in the BCS population. The results of our study warrant replication across longitudinal studies but continue to expand upon the evidence of the multifactorial nature of pain coping in BCS.

The Pain-to-Well-Being Relationship in Patients Experiencing Chronic Orofacial Pain

Introduction: Orofacial pain features may negatively influence a person's well-being and vice versa. Some aspects of well-being can be measured with axis II instruments that assess patients' psychosocial and behavioral status. The aim of this study was to investigate associations between pain features and psychosocial variables as indicators of well-being. Materials and Methods: Seven hundred ninety-nine anonymized datasets collected using the Web-based Interdisciplinary Symptom Evaluation (WISE) of patients reporting to the Interdisciplinary Orofacial Pain Unit, University of Zurich, between March 19, 2017 and May 19, 2019, were analyzed. Pain features including intensity, number of locations, impact, and duration were evaluated. Psychometric measures assessed pain-related catastrophizing and disability, illness perception, distress, anxiety, depression, injustice experience, dysmorphic concerns, and insomnia. Results: Most patients were between 30 and 59 years old (58.3%), female (69.8%), working (66.0%), and experienced pain for more than 6 months (68.5%). Pain intensities were higher in women than men and higher in disabled than working patients. Scores indicating elevated stress and depression were also observed in disabled patients. The sample prevalence rates of clinically relevant axis II instrument scores were as follows: Graded Chronic Pain Scale for the Head (GCPS-H), 27%; Patient Health Questionnaire 4 (PHQ4), 21%; PHQ9, 21%; Pain Catastrophizing Scale (PCS), 20%; General Anxiety Disorder 7 (GAD7), 15%; Insomnia Severity Index (ISI), 15%; Injustice Experience Questionnaire (IEQ), 14%; GCPS for the Body (GCPS-B), 13%; PHQ for Stress (PHQstr), 6%; and Dysmorphic Concern Questionnaire (DCQ), 2%. Noteworthy results of correlation analysis of the clinically relevant axis II scores and pain measures were as follows: the PHQstr had moderate associations (0.34-0.43) with the sum of pain intensity at rest and during function, number of pain locations, and typical pain intensity. The IEQ scores were moderately associated with typical pain intensity at 0.39. The DCQ scores were moderately associated with pain extension at 0.41. Conclusions: Moderate correlations of certain pain and well-being measures were found in patients reporting clinically relevant stress, injustice experience, and dysmorphic concern, all of which reflect impaired well-being. PHQ4 is suitable for routine distress screening in the clinical setting.

Development and validation of a daily Injustice Experience Questionnaire

BACKGROUND

Patterns of cognitive appraisal related to chronic pain may manifest differentially across time due to a variety of factors, but variability of injustice appraisals across time has not been examined. The current study details the validation of a brief, daily version of the Injustice Experience Questionnaire (IEQ), which measures injustice appraisals related to the experience of pain and disability.

METHODS

Injustice Experience Questionnaire items were adapted for daily use and evaluated using cognitive interviews, and the resulting measure was administered for 10 days to two Internet-based samples of US adults with chronic lower back pain.

RESULTS

Study 1 (N = 126) refined the 12-item IEQ measure into a six-item short form; exploratory factor analyses suggested optimal model fit for the two-factor model established in the original IEQ. Using confirmatory factor analyses, Study 2 (N = 131) replicated the two-factor structure and demonstrated significant correlations of the Daily IEQ with other relevant constructs to chronic pain, such as pain catastrophizing, pain intensity, pain-related activity and social interference, depressed mood and anxiety. Daily IEQ items showed a significant degree of clustering (intraclass correlations ranging from .577 to .735) but demonstrated sufficient variability at the daily level to allow for daily-level analysis.

CONCLUSIONS

Injustice appraisals show a sufficient degree of daily variability to warrant their measurement as a time-varying construct. Further examination of antecedents and correlates of daily injustice appraisals, as well as their potential role as mechanisms of effect, may better explain the dynamics of affective and behavioral responses to chronic pain.

SIGNIFICANCE

The current study presents a validation of a daily version of the Injustice Experience Questionnaire in chronic low back pain. Results indicate that injustice appraisals vary significantly from day to day, and daily variability in injustice perception shows robust associations with pain intensity, pain-related interference in physical and social activity, and mood in chronic low back pain. These results emphasize the importance of assessing injustice perception as a time-varying, rather than stable construct in future empirical and clinical studies.

Psychometric Testing of the Premenstrual Symptoms Questionnaire and the Association Between Perceived Injustice and Premenstrual Symptoms: A Cross-Sectional Study Among Japanese High School Students

Purpose

Premenstrual symptoms comprise a wide range of mood, behavioral, and physical symptoms occurring during the luteal phase. Perceived injustice is a belief linked to unfairness (ie, unnecessary suffering caused by illness). This study aimed to assess the validity and reliability of the Premenstrual Symptoms Questionnaire (PSQ), a patient-reported outcome measurement tool, and to examine the association between perceived injustice/perception of menstruation and premenstrual symptoms, as measured by the PSQ.

Materials and Methods

Of 1388 female students, we analyzed 879 students with regular menstrual cycles who completed the PSQ, the premenstrual dysphoric disorder (PMDD) scale, the Somatic Symptom Scale-8 (SSS-8), and the Injustice Experience Questionnaire-chronic (IEQ-chr). First, the PSQ was examined for evidence of reliability and validity. Next, we used multiple regression and multivariate logistic regression to investigate the association between perceived injustice and premenstrual symptoms, using PSQ score as both a continuous variable and a dichotomous variable (premenstrual disorders or not). Moreover, the association between PSQ score and perceived menstruation was tested using student's t-test and analysis of variance.

Results

In terms of reliability, Cronbach's α for PSQ score was 0.93. To assess structural validity, we used confirmatory factor analysis, which showed that the one-factor model and the two-factor model were a good fit. The PSQ showed good agreement with the PMDD scale. In terms of concurrent validity, PSQ total score correlated strongly with PMDD scale score, SSS-8 score, and IEQ-chr score (r = 0.88, 0.69, 0.57, respectively). IEQ-chr score predicted PSQ score (standardized regression coefficient = 0.53; P < 0.0001) and higher prevalence of premenstrual disorders (odds ratio: 1.15; 95% confidence interval: 1.12-1.19). Negative perception of menstruation was associated with premenstrual symptoms.

Conclusion

The PSQ showed sound psychometric properties among the adolescents in our sample. Perceived injustice and negative perception of menstruation were associated with premenstrual symptoms.

Perceived fairness of claimants undergoing a work disability evaluation: Development and validation of the Basel Fairness Questionnaire

Background

There are currently no tools for assessing claimants’ perceived fairness in work disability evaluations. In our study, we describe the development and validation of a questionnaire for this purpose.

Method

In cooperation with subject-matter experts of Swiss insurance medicine, we developed the 30-item Basel Fairness Questionnaire (BFQ). Claimants anonymously answered the questionnaire immediately after their disability evaluation, still unaware about its outcome. For each item, there were four response options, ranging from “strongly disagree” to “strongly agree”. The construct validity of the BFQ was assessed by running a principal component analysis (PCA).

Results

In 4% of the questionnaires, the claimants’ perception on the disability evaluation was negative (below the median of the scale). The PCA of the items responses followed by an orthogonal rotation revealed four factors, namely (1) Interviewing Skills, (2) Rapport, (3) Transparency, and (4) Case Familiarity, explaining 63.5% of the total variance.

Discussion

The ratings presumably have some positive bias by sample selection and response bias. The PCA factors corresponded to dimensions that subject-matter experts had beforehand identified as relevant. However, all item ratings were highly intercorrelated, which suggests that the presumed underlying dimensions are not independent.

Conclusion

The BFQ represents the first self-administered instrument for measuring claimants’ perceived fairness of work disability evaluations, allowing the assessment of informational, procedural, and interactive justice from the perspective of claimants. In cooperation with Swiss assessment centres, we plan to implement a refined version of the BFQ as feedback instrument in work disability evaluations.

Telemonitoring in Chronic Pain Management Using Smartphone Apps: A Randomized Controlled Trial Comparing Usual Assessment against App-Based Monitoring with and without Clinical Alarms

BACKGROUND

The usefulness of mHealth in helping to target face-to-face interventions for chronic pain more effectively remains unclear. In the present study, we aim to test whether the Pain Monitor mobile phone application (app) is well accepted by clinicians, and can help improve existent medical treatments for patients with chronic musculoskeletal pain. Regarding this last goal, we compared three treatment conditions, namely usual treatment, usual treatment with an app without alarms and usual treatment with an app with alarms. All treatments lasted one month. The three treatments were compared for all outcomes, i.e., pain severity and interference, fatigue, depressed mood, anxiety and anger.

METHODS

In this randomized controlled trial, the usual monitoring method (i.e., onsite; n = 44) was compared with daily ecological momentary assessment using the Pain Monitor app-both with (n = 43) and without alarms (n = 45). Alarms were sent to the clinicians in the presence of pre-established undesired clinical events and could be used to make treatment adjustments throughout the one-month study.

RESULTS

With the exception of anger, clinically significant changes (CSC; 30% improvement) were greater in the app + alarm condition across outcomes (e.g., 43.6% of patients experienced a CSC in depressed mood in the app + alarm condition, which occurred in less than 29% of patients in the other groups). The clinicians were willing to use the app, especially the version with alarms.

CONCLUSIONS

The use of apps may have some benefits in individual health care, especially when using alarms to tailor treatments.

The relation between perceived injustice and symptom severity in individuals with major depression: A cross-lagged panel study

BACKGROUND

Perceived injustice has been associated with problematic recovery outcomes in individuals with debilitating health conditions. However, the relation between perceived injustice and recovery outcomes has not been previously examined in individuals with debilitating mental health conditions. The present study examined the relation between perceived injustice and symptom severity in individuals undergoing treatment for Major Depressive Disorder (MDD).

METHODS

The study sample consisted of 253 work-disabled individuals with MDD who were referred to an occupational rehabilitation service. Participants completed measures of depressive symptom severity, perceived injustice, catastrophic thinking, pain and occupational disability at three time-points (pre-, mid- and post-treatment) during a 10-week behavioural activation intervention.

RESULTS

Regression analysis on baseline data revealed that perceived injustice contributed significant variance to the prediction of depressive symptom severity, beyond the variance accounted for by time since diagnosis, pain severity and catastrophic thinking. Prospective analyses revealed that early treatment reductions in perceived injustice predicted late treatment reductions in depressive symptom severity.

LIMITATIONS

The study sample consisted of work-disabled individuals with MDD who had been referred to an occupational rehabilitation service. This selection bias has implications for the generalizability of findings.

CONCLUSION

The findings suggest that perceived injustice is a determinant of symptom severity in individuals with MDD. The inclusion of techniques designed to reduce perceived injustice might augment positive treatment outcomes for individuals receiving treatment for MDD.

Pain Acceptance Partially Mediates the Relationship Between Perceived Injustice and Pain Outcomes Over 3 Months

OBJECTIVES

Perceived injustice is a maladaptive cognitive appraisal of pain or injury, characterized by attributions of blame, unfairness, severity of loss, and irreparability of loss. Research suggests that perceived injustice may negatively affect pain outcomes by inhibiting the development of pain-related acceptance. The current study aimed to extend cross-sectional research by testing whether pain acceptance mediates the effects of perceived injustice on pain-related outcomes longitudinally.

MATERIALS AND METHODS

Data was analyzed from a prospective study to examine the potential mediating role of pain acceptance on recovery 3 months after an episode of low back pain. Using Mechanical Turk, we recruited participants who experienced an episode of back pain within the preceding 2 weeks, 343 of whom completed measures of perceived injustice, pain acceptance, pain ratings, and quality of life at each of 3 timepoints (recruitment, 1 mo later, and 3 mo later). Path analyses were conducted to examine pain acceptance at 1 month as a potential mediator of the relationship between perceived injustice at recruitment and pain intensity, disability, and depressive symptoms at 3 months.

RESULTS

Results indicated that perceived injustice at recruitment was directly related to pain intensity, disability, and depressive symptoms 3 months later, and that pain acceptance partially mediated these relationships.

DISCUSSION

Although these findings provide further support for pain acceptance as a buffer for the deleterious effects of perceived injustice, they also highlight that adjunctive mechanisms should be investigated to provide more comprehensive clinical insight.

"No one wants you" - a qualitative study on the experiences of receiving rejection from tertiary care pain centres

Background and aims Four out of 10 referrals to tertiary care pain centres in Norway are not granted pain centre treatment, confirming earlier research on that this group of patients struggle to access the highest standard of care. Still, no study investigating how people with chronic pain experience rejections from pain centres was found. The aim of the study was therefore to investigate how people with chronic pain experience receiving a rejection from tertiary care pain centres after being referred by their general practitioners (GPs). Methods This was a qualitative study with semi-structured individual interviews with 12 persons, seven men and five women, rejected from the four different pain centres in Norway. The data were analysed thematically using systematic text condensation. Results The pain centre rejection created strong reactions, partly because the rejection was perceived as a refusal from the health care system as a whole. This was especially so because the pain centre was regarded as the last remaining treatment option, and given the rejection, they were now declined help by the experts in the field. Even though some informants had received an explanation for why they had not been granted pain centre treatment, a prominent experience was that the informants found it difficult to understand why their referral had been rejected given the severity of their pain. The incomprehensibility of the rejection together with a feeling of lack of future treatment options, increased the hopelessness and frustration of their situation and made it challenging to move on and search for help elsewhere. Conclusions The experiences with the pain centre rejections indicate that the rejection can have grave consequences for each individual in the following months. An improved system for how to handle expectations towards referrals, including prepare for the possibility of rejection and how to follow up a rejection, seems warranted. Implications Because a pain centre rejection most likely is received by persons in a vulnerable position, there should be available health care services to help them understand the rejections. And furthermore, help them to move from disappointment and hopelessness, towards an experience of empowerment and reorientation, by for instance planning further actions and interventions, and thereby, acknowledge their need for help.

Navigating the Intersection Between Persistent Pain and the Opioid Crisis: Population Health Perspectives for Physical Therapy

The physical therapy profession has recently begun to address its role in preventing and managing opioid use disorder (OUD). This topic calls for discussion of the scope of physical therapist practice, and the profession's role, in the prevention and treatment of complex chronic illnesses, such as OUD. OUD is not just an individual-level problem. Abundant scientific literature indicates OUD is a problem that warrants interventions at the societal level. This upstream orientation is supported in the American Physical Therapy Association's vision statement compelling societal transformation and its mission of building communities. Applying a population health framework to these efforts could provide physical therapists with a useful viewpoint that can inform clinical practice and research, as well as develop new cross-disciplinary partnerships. This Perspective discusses the intersection of OUD and persistent pain using the disease prevention model. Primordial, primary, secondary, and tertiary preventive strategies are defined and discussed. This Perspective then explains the potential contributions of this model to current practices in physical therapy, as well as providing actionable suggestions for physical therapists to help develop and implement upstream interventions that could reduce the impact of OUD in their communities.

Injustice is Served: Injustice Mediates the Effects of Interpersonal Physical Trauma on Posttraumatic Stress Symptoms and Depression Following Traumatic Injury

Previous research has consistently found that traumas of an interpersonal nature are associated with elevated levels of posttraumatic stress symptoms (PTSS). In the current study, we examined whether feelings of injustice related to sustained physical trauma mediate the association between the interpersonal nature of a traumatic injury and two outcomes: PTSS and depressive symptoms. The sample consisted of 176 patients admitted to a Level 1 trauma center for traumatic injuries. Participants completed measures of PTSS, depressive symptoms, and injury-related injustice perception at baseline and again at 3- and 6-month postinjury follow-ups. The results revealed that, compared to noninterpersonal injuries, interpersonal injuries were related to significantly higher levels of perceived injustice, PTSS, and depressive symptoms at all three assessment points, except for PTSS at baseline, ds = 0.47-1.23. These associations remained significant after accounting for injury severity. It is important to note that higher levels of perceived injustice 3-month postinjury follow-up mediated the association between the interpersonal nature of the trauma and higher levels of PTSS and depressive symptoms at 6 months postinjury. Our results suggest injustice may be an important factor that helps explain why interpersonal traumas are associated with poorer mental health outcomes than noninterpersonal traumas. Additionally, the current study provides some of the first prospective analyses of injustice perception and trauma outcomes.

Pain and Evil: From Local Nociception to Misery Following Social Harm

Experiencing pain, especially when chronic, is an excruciating condition that should be regarded as a syndrome, if not a disease. People suffering from chronic pain tend to develop psychological discomfort mostly due to lack of acceptance, disbelief, blame. The complexity of pain pathophysiology, plus a wide range of negative psychosocial factors, leads to a more complex suffering that deserves attention and multidisciplinary treatments. The possibility that chronic pain may occur following physical aggression, torture, or persecution raises the issue of evil as a major contributor to pain in its worst representation - when individuals or groups are attacked based on racial, social, gender, religious, political, or other grounds. To explore the complex issue of chronic pain following physical or psychological harm, and to underscore the need for a multidisciplinary approach to reduce the burden of chronic pain, we discuss the biological mechanisms underlying pain state. We seek to clarify those factors leading to pain chronification, as well as personal and social attitudes that confound patients with chronic pain. The importance of family and social environment is also investigated, as well as personality traits of chronic pain patients that may further hamper successful treatment. The presence of chronic pain, modulated by, for example, acceptance of being a victim of premeditated physical and social violence, makes the issue more difficult to comprehend.

Perceived Injustice Mediates the Relationship Between Perceived Childhood Neglect and Current Function in Patients with Chronic Pain: A Preliminary Pilot Study

Cumulative evidence supports the association between perceived childhood neglect and adulthood psychological and physical health. To date, pathways mediating this association remain largely unknown, though other evidence suggests that negative patterns of appraisal, including injustice perception related to pain, may be shaped by prior adverse social experiences. Consequently, the current study examined perceived injustice about chronic pain as a possible factor connecting childhood neglect and pain-related outcomes, given its relevance for both adaptation to chronic pain and to prior adverse life experiences. Patients (n = 742) visiting a tertiary pain clinic completed a survey administered via the Collaborative Health Outcomes Information Registry. Path modeling analyses were used to examine perceived injustice as a mediator of the relationships between childhood neglect and affective distress and physical function, after controlling for pain intensity and pain catastrophizing. Patients endorsing childhood neglect reported higher levels of perceived injustice and worse affective distress and physical function. Further, inclusion of perceived injustice as a mediator fully accounted for the relationship between neglect and current levels of physical function, and accounted for a significant proportion of the relationship between neglect and current levels of affective distress. These preliminary findings suggest that perceived injustice appears to be a more proximal factor by which prior experiences of neglect may adversely affect adaptation to chronic pain. Given the single-item assessment of childhood neglect and cross-sectional nature of the current findings, further research may focus on replicating these findings in longitudinal studies with validated measures and examining other adverse social experiences (e.g., abuse, social disparities) that may contribute to injustice perception and poor pain-related outcomes.

A Systematic Review of the Association Between Perceived Injustice and Pain-Related Outcomes in Individuals with Musculoskeletal Pain

Objective

A growing body of literature shows that justice-related appraisals are significant determinants of pain-related outcomes and prolonged trajectories of recovery. We conducted a systematic review of the literature assessing the relationship between perceived injustice and pain-related outcomes in individuals with musculoskeletal pain.

Design and Participants

A search of published studies in English in PubMed, PsychInfo, Embase, and Cochrane Database of Systematic Reviews from database inception through May 2019 was performed. Search terms included “perceived injustice,” “injustice appraisals,” “perceptions of injustice,” and “pain” or “injury.”

Results

Thirty-one studies met inclusion criteria. Data for a total of 5,969 patients with musculoskeletal pain were extracted. Twenty-three studies (71.9%) reported on individuals with persistent pain lasting over three months, and 17 studies (53.1%) reported on individuals with injury-related musculoskeletal pain. Significant associations were found between perceived injustice and pain intensity, disability and physical function, symptoms of depression and anxiety, post-traumatic stress disorder, quality of life and well-being, and quality of life and social functioning.

Conclusions

This systematic review summarizes the current evidence for the association between perceived injustice and pain-related outcomes. There is strong evidence that perceived injustice is associated with pain intensity, disability-related variables, and mental health outcomes. Implications and directions for future research are discussed.

Prevalence of Posttraumatic Stress Symptoms and Associated Characteristics Among Patients With Chronic Pain Conditions in a Norwegian University Hospital Outpatient Pain Clinic

Introduction

Comorbid posttraumatic stress disorder (PTSD) in patients with chronic pain may have a negative effect on the course and outcome of both disorders. Nevertheless, the co-occurrence of the two conditions is often overlooked in clinical settings. Further, little is known about how PTSD is associated with biopsychosocial characteristics in this patient group. The first objective was to assess the prevalence of posttraumatic stress symptoms (PTSS) in patients with chronic pain in a Norwegian university hospital outpatient pain clinic. The second objective was to investigate possible associations between PTSS and adverse outcomes such as pain intensity, disability, and distress. The third objective was to compare the PTSS prevalence rates between primary versus secondary pain conditions.

Materials and methods

Six hundred and ninety-two patients meeting for pain assessment completed self-report questionnaires about PTSS and possibly associated factors. The Life Events Checklist and the Stressful Life Events Screening Questionnaire were used to screen for potentially traumatic life events. The Impact of Events Scale - Revised and the PTSD Checklist for DSM-5 were used to assess PTSS. Differences between patients with and without severe PTSS on the possibly associated variables were analyzed by chi-squared-, and t-tests.

Results

20.7% of the participants reported a level of PTSS qualifying for a PTSD diagnosis. These patients reported higher levels of pain intensity, pain bothersomeness, disability, and psychological distress, as well as lower levels of self-efficacy. They also reported higher levels of pain catastrophizing, perceived injustice, fatigue, and sleep difficulties. Finally, there was not a significant difference in prevalence rates between primary and secondary pain conditions.

Discussion

PTSS are frequent in patients with chronic pain, and a range of psychological characteristics is associated with a high level of such symptoms in this patient group. Patients with both conditions report a significantly higher symptom load, and the potential impact on the individual's life is major. In terms of pain condition, there were no differences in PTSS between primary pain conditions and secondary pain conditions in this pain population. This study emphasizes the importance of increased attention on PTSS when seeing patients with chronic pain conditions in clinical practice.

Associations between the injustice experience questionnaire and treatment term in patients with acute Whiplash-associated disorder in Japan: Comparison with Canadian data

Introduction

This study aimed to investigate the differences in the Injustice Experience Questionnaire (IEQ) scores during the early period after the diagnosis of Whiplash-associated disorder (WAD) between Japanese and Canadian samples, and the associations between the IEQ scores and treatment terms in Japanese patients with acute WAD.

Methods

We used secondary data for the IEQ scores of Canadian patients with acute WAD. In Japan, we collected data from 85 consecutively enrolled patients with acute WAD, and their treatment terms were collected; these referred to the number of days between the date of injury and the closure date of the insurance claim and the number of treatment visits. Before treatment, the Numeric Rating Scale, Neck Disability Index, Hospital Anxiety and Depression Scale, IEQ, and Euro Quality of Life five-dimensional questionnaire were administered. The variables were subjected to multivariate analysis with each treatment term.

Results

The IEQ scores were higher in Japan than in Canada. Through multiple regression analysis, IEQ scores were independently correlated with treatment terms. The optimal cutoff point of the IEQ scores for a prolonged treatment term was 21 and 22 points, respectively.

Conclusions

The IEQ scores were associated with treatment terms in patients with acute WAD in Japan.

The Oslo University Hospital Pain Registry: development of a digital chronic pain registry and baseline data from 1,712 patients

Background and aims Chronic pain is a leading cause to years lived with disability worldwide. However, few of the interventions used in pain medicine have proven efficacy, and evidence from the existing studies may not be valid for the general pain population. Therefore, it is of utmost need that we describe chronic pain conditions in their most relevant aspects, their various guises, as well as the real world outcomes of our clinical interventions. The most obvious and crude way to make these assessments are through large registries where patient characteristics, treatment characteristics (including but not limited to what, when, how often and by whom), treatment outcomes and patient outcomes are scrutinized and recorded. Methods and results This article describes in detail the design and baseline data of the comprehensive Oslo University Hospital Pain Registry (OPR). OPR is the local registry of the largest university and interdisciplinary outpatient pain clinic in Norway. Data registration started in October 2015, and approximately 1,000 patients are assessed and treated at the clinic each year. During the first 2 years of running the OPR (through September 2017), a total of 1,712 patient baseline reports were recorded from 2,001 patients. Clinicians enter data about relevant treatments and interventions, while patients provide self-reported data on aspects related to pain and pain management. The patients complete an electronic registration immediately before their first consultation at the outpatient pain clinic. The baseline questions of the OPR cover: Basic demographics; The Modified Oswestry Disability Index to assess general function; A pain drawing to assess pain location; Questions regarding the temporal aspects of pain; Six 0-10 Numeric Rating Scales to assess pain intensity and bothersomeness; The EQ-5D-5L to measure health-related quality of life; The Hopkins Symptom Check List-25 to assess psychological distress; A single question about self-rated health; The general self-efficacy scale to assess the patient's perceived self-efficacy; The Bodily Distress Syndrome checklist to assess functional disorders; The Injustice Experience Questionnaire to assess whether the patients experience injustice; Chalder Fatigue Questionnaire to assess fatigue; The Insomnia Severity Index to assesses the levels of insomnia symptoms; The Pain Catastrophizing Scale to measure pain catastrophizing and exaggerated negative orientation toward pain stimuli and pain experience; And the SF36v2 to assess patients' self-report of generic health and wellbeing. The baseline data show that chronic pain patients have a high degree of negative impact in all aspects of their lives. Conclusions and implications The OPR is the most comprehensive pain registry for multidisciplinary and interdisciplinary outpatient pain clinics in Norway. Detailed design of the registry and key baseline data are presented. Registries are of great value in that they enable real world effectiveness outcomes for patients with chronic pain conditions. The OPR can thus serve as a model for similar initiatives elsewhere. The OPR cohort may also serve as a historical control in future studies, both with experimental and observational design.

Reductions in Fatigue Predict Occupational Re-engagement in Individuals with Work-Related Musculoskeletal Disorders

Background Symptoms of fatigue have been shown to be associated with heightened levels of disability in patients suffering from a wide range of debilitating health and mental health conditions. The role of fatigue as a determinant of work disability in individuals with work-related musculoskeletal disorders (WRMD) has received little attention. The present study examined the role of fatigue as a determinant of work-disability in individuals with WRMDs. Methods Participants included 117 individuals with WRMDs who completed measures of pain severity, fatigue, depression and disability before and after participating in a behavioral activation rehabilitation intervention. Results Cross-sectional analyses on pre-treatment measures revealed that fatigue contributed significant variance to the prediction of self-reported disability, beyond the variance accounted for by pain severity and depression. Prospective analyses revealed that reductions in fatigue through the course of treatment predicted occupational re-engagement following termination of the intervention. Conclusions The results of the present study suggest fatigue contributes to occupational disability, independent of the effects of pain and depression. The findings also suggest that meaningful reductions in fatigue might be achieved through psychosocial interventions that promote gradual re-integration into discontinued activities, increase participants' exposure to success and achievement experiences, and reduce the severity of depressive symptoms. Behavioural activation interventions such as the one used in the present study might contribute to more positive occupational outcomes in work-disabled individuals who report high levels of fatigue.