An examination of the structural link between post-traumatic stress symptoms and chronic pain in the framework of fear-avoidance models

Translation, cross-cultural adaptation, and measurement properties of the Arabic version of the fear avoidance components scale

PURPOSE

This study aimed to translate, validate, and cross-culturally adapt the original FACS into the Arabic language.

METHODS

The English version of the FACS was translated and culturally adapted into Arabic following international guidelines. The psychometric properties of the final version of the FACS-Arabic (FACS-A) were tested among 119 patients with different musculoskeletal (MSK) pain disorders.

RESULTS

The Cronbach's α for the FACS-A was 0.86. The test-retest reliability, measured with intraclass correlation coefficient, was 0.80. The FACS-A showed positive significant correlations with other psychological patient-reported measures, including the pain catastrophizing scale (PCS) (r = 0.545); p ≤ 0.01), Brief Pain Inventory (BPI)-pain score (r = 0.546; p ≤ 0.01), BPI-pain interference score (r = 0.511; p ≤ 0.01), and Hospital Anxiety and Depression Scale (HADS) (r = 0.451, 0.336, respectively; p ≤ 0.01). Confirmatory factor analysis of the FACS-A confirmed the two-factor structure found in the original English version.

CONCLUSION

This study determined the FACS-A to be a reliable and valid tool for the assessment of the fear-avoidance beliefs in Arabic-speaking individuals with MSK pain disorders.

The impact of post-traumatic stress on the clinical outcome in a cohort of patients with knee osteoarthritis and knee arthroplasty: A prospective study

BACKGROUND

Knee osteoarthritis (KOA) is one of the most common musculoskeletal disorders and commonly occurs in older adults, predominantly female populations. Both populations have intimate links with trauma-related stress. Therefore, we intended to evaluate the prevalence of post-traumatic stress disorder (PTSD), which arises from KOA and determine its effects on the postoperative results in patients undergoing total knee arthroplasty (TKA).

METHODS

The patients who fulfilled the diagnosis of KOA from February 2018 to October 2020 were interviewed. Patients were interviewed by a senior psychiatrist about evaluating their overall experience during their most difficult or stressful situations. KOA patients who underwent TKA were further analyzed to investigate whether PTSD influences the postoperative results. The PTSD Checklist-Civilian Version (PCL-C) and Western Ontario McMaster Universities (WOMAC) Osteoarthritis Index were used to assess PTS symptoms and clinical outcomes after TKA, respectively.

RESULTS

212 KOA patients completed this study with a mean follow-up of 16.7 months (7-36 months). The mean age was 62.5 ± 12.3 years, and 53.3% (113/212) were women. 64.6% of the sample (137/212) underwent TKA to relieve the symptoms of KOA. Patients with either PTS or PTSD tended to be younger (P < 0.05), female (P < 0.05) and undergo TKA (P < 0.05) than their counterparts. WOMAC-pain (P < 0.05), WOMAC-stiffness (P < 0.05), and WOMAC-physical function (P < 0.05) both before TKA and 6 months after TKA in the PTSD group is significantly higher compared to their counterparts. Logistic regression analysis showed that a history of OA-inducing trauma (adjusted OR = 2.0, 95% CI = 1.7-2.3, P = 0.003), posttraumatic KOA (adjusted OR = 1.7, 95% CI = 1.4-2.0, P < 0.001), and invasive treatment (adjusted OR = 2.0, 95% CI = 1.7-2.3, P = 0.032), were significantly associated with PTSD in KOA patients.

CONCLUSIONS

Patients with KOA, especially those undergoing TKA, are associated with PTS symptoms and PTSD, indicating the need to evaluate it and offer care for them.

Associations of Posttraumatic Stress Disorder Symptom Clusters and Pain Interference in Post-9/11 Veterans: Exploring Sleep Impairment and Physical Activity as Underlying Mechanisms

BACKGROUND

Posttraumatic stress disorder (PTSD) symptoms and pain are highly prevalent and comorbid, particularly in veterans, but mechanisms explaining their linkage remain unclear. The aims of this study were to determine: (1) whether sleep impairment and physical activity (PA) mediate relations between PTSD symptoms and pain interference (assessed both longitudinally and as residual change) and (2) the unique roles of each PTSD symptom cluster in those relationships.

METHODS

The present study is a secondary analysis of a longitudinal observational investigation of 673 post-9/11 veterans (45.8% women). Surveys were administered at baseline and 3-month and 6-month follow-ups.

RESULTS

PTSD symptoms were significantly associated with pain interference longitudinally and worsening pain interference over time. Sleep impairment, but not PA, significantly mediated the relationship between PTSD symptoms and subsequent pain interference. Hyperarousal symptoms were found to be the primary driver of the relationship between PTSD symptoms and pain interference and re-experiencing symptoms were associated with change in pain interference via sleep impairment. Men and women did not differ on any of the study variables with the exception of PA.

CONCLUSION

Findings underscore the importance of targeting sleep as a key modifiable health factor linking PTSD symptoms to pain interference in post-9/11 veterans.

Are We Any Closer to Understanding How Chronic Pain Develops? A Systematic Search and Critical Narrative Review of Existing Chronic Pain Vulnerability Models

Identifying biopsychosocial factors underlying chronic pain vulnerability is essential for the design of preventative efforts. Multiple chronic pain vulnerability models exist, however, there is a lack of comprehensive evaluation of these models in the literature, potentially due to the lack of guidelines that specify the criteria by which these types of work should be assessed. In this work, we created evaluation criteria (based on the general goals of conceptual models), and we then used them to critically review the chronic pain vulnerability models available in the current peer-reviewed literature (identified through a systematic search). Particularly, we evaluated the models on the basis of conceptual clarity/specificity of measures, depth of description of aetiological and mechanistic factors, use of a whole system approach, and quality of the evidence associated with the models. We found nine conceptual models that have been explored in detail (eg, fear avoidance model, diathesis-stress model). These models excel at clarity and are supported mostly by self-report evidence of a psychological nature (anxiety sensitivity, pain catastrophizing, etc.), but provide little explanation of mechanistic and aetiological factors. In the future, models could be improved by complementing them with proposals from other models and exploring potential causal factors and mechanisms maintaining the condition. This task could be carried out through prospective cohort studies, and computational approaches, amongst others.

Posttraumatic Stress Disorder Symptom Clusters as Predictors of Pain Interference in Burn Survivors: A Burn Model System National Database Study

Individuals who experience burns are at higher risk of developing posttraumatic stress disorder and chronic pain. A synergistic relationship exists between posttraumatic stress disorder and chronic pain. We sought to evaluate the role of individual posttraumatic stress disorder symptom clusters as predictors of pain interference. We hypothesized that the hyperarousal and emotional numbing symptom clusters would be predictive of pain interference, even when accounting for the other two posttraumatic stress disorder symptom clusters, pain intensity, and other covariates. Multivariate linear regression analyses were completed using data from the Burn Model System National Database. A total of 439 adult participants had complete responses on self-report measures assessing posttraumatic stress disorder symptoms, pain intensity, and pain interference at 6-month after discharge and were included in analyses. Results indicate hyperarousal (B = .10, p = .03) and emotional numbing (B = .13, p = .01) posttraumatic stress disorder symptom clusters were each significantly associated with pain interference, even when accounting for pain intensity (B = .64, p < .001). Results highlight the importance of the emotional numbing and hyperarousal posttraumatic stress disorder symptom clusters in explaining pain interference. Findings suggest that when posttraumatic stress disorder symptoms or chronic pain are present, screening for and treating either condition may be warranted to reduce pain interference. Further, psychological interventions that target emotional numbing and hyperarousal posttraumatic stress disorder symptoms may be fruitful for promoting better coping with chronic pain and reducing pain interference.

Post-Traumatic Orientation to Bodily Signals: A Systematic Literature Review

Theoretical literature suggests that trauma and (PTSD) may instigate changes in the interpretation of bodily signals. Some findings support these inquiries, revealing that exposure to traumatic events and PTSD are associated with pain catastrophizing, body vigilance, fear of pain, and other manifestations of bodily perceptions and interpretations. However, these findings are not integrated into an inclusive empirically based conceptualization, thus leading to a limited comprehension of this phenomenon. This systematic literature review was conducted to synthesize the existing literature referring to orientation to bodily signals. Using Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, the review included a final of 48 manuscripts that addressed orientation to bodily signals among participants (aged 18 and above) and its potential associations with PTSD. The review revealed that most studies assessed one orientation manifestation, which was tested for its link to PTSD. The majority of the manuscripts were cross-sectional and included participants who faced combat, vehicle accidents, or various types of traumas. Only five manuscripts focused on interpersonal trauma and abuse. Most manuscripts reported significant correlations, revealing that trauma and PTSD are associated with a negative, catastrophic and frightful interpretation of bodily signals. These findings emphasize the need to encapsulate the various manifestations of orientation to bodily signals under a unified construct, as proposed by the term post-traumatic orientation to bodily signals. Further research is needed to illuminate the circumstances and processes by which trauma is implicated in post-traumatic orientation to bodily signals.

Pain, cancer-related distress, and physical and functional well-being among men with advanced prostate cancer

PURPOSE

Men with advanced prostate cancer (APC) experience high levels of pain, which contribute to poor psychosocial and functional outcomes. Cancer-related distress explains the relationship between pain severity and interference, yet specificity of distress characteristics (e.g., hyperarousal, intrusive, or avoidant symptoms) in explaining associations between pain experiences and well-being has not been explored within APC. This study examined men with APC entering a clinical trial and tested associations of baseline pain, cancer-related distress, and physical and functional well-being.

METHODS

One hundred ninety men with APC enrolled in a randomized-controlled trial and were assessed prior to randomization. The McGill Pain Questionnaire assessed pain severity, and the Functional Assessment of Cancer Therapy-General captures physical and functional well-being. The Impact of Events Scale-Revised measured cancer-specific distress symptoms, including hyperarousal, avoidance, and intrusion symptoms. Controlling for age, cancer stage at diagnosis, income, education, and race/ethnicity, mediation models (SPSS PROCESS, model 4) tested whether cancer-specific distress accounted for the associations between pain severity and physical and functional well-being.

RESULTS

Men were on average 68 years of age, White non-Hispanic, with stage IV cancer. Pain severity was related to poorer physical (p < .001) and functional well-being (p < .001). Associations between pain severity and physical and functional well-being were partially mediated by greater intrusive and hyperarousal symptoms but not avoidant symptoms.

CONCLUSION

For men with APC, intrusive and hyperarousal symptoms may partially explain the relationship between pain severity and decrements in physical and functional well-being. APC pain management should attend to such distress symptoms, which may contribute to interference if left unaddressed.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT03149185.

The Helplessness Dimension of Pain Catastrophizing Mediates the Relation between PTSD Symptoms and Pain Rehabilitation Measures

Background

Comorbid chronic pain and post-traumatic stress disorder (PTSD) complicate the treatment of both conditions. Previous research has identified pain catastrophizing as a potentially important variable contributing to the relationship between chronic pain and PTSD. However, little is known regarding how the different dimensions of pain catastrophizing-rumination, magnification, and helplessness-uniquely contribute to the relationship between PTSD symptomatology and measures of pain outcome.

Methods

491 treatment seeking participants were admitted to a three-week interdisciplinary pain rehabilitation program between July 2016 and March 2020. The patients completed measures of pain severity, pain interference, pain catastrophizing, depressive symptoms, quality of life (QOL), and PTSD symptoms at pretreatment.

Results

Parallel mediation analyses were conducted to evaluate the mediating effect of the Pain Catastrophizing Scale subscales on the relationship between PTSD symptomatology and pain-relevant variables. The helplessness subscale accounted for significant unique variance in the relationship between PTSD symptomatology and pain severity (b = 0.010, SE = 0.002, 95% CI: 0.006, 0.014), pain interference (b = 0.004, SE = 0.002, 95% CI: 0.001, 0.008), and mental health QOL (b = -0.117, SE = 0.031, 95% CI: -0.179, -0.059), while the rumination and magnification subscales had no significant influence.

Conclusions

Pain catastrophizing is a multifaceted construct. These results suggest that the helplessness dimension of pain catastrophizing may be the primary target when treating patients with comorbid chronic pain and PTSD symptoms. This study represents the first to evaluate the influence of the individual dimensions of pain catastrophizing on the relationship between PTSD symptomatology and chronic pain outcome.

Emotional numbing in PTSD is associated with lower amygdala reactivity to pain

Posttraumatic stress disorder (PTSD) is associated with altered pain perception, namely increased pain threshold and higher pain response. While pain consists of physiological and affective components, affective components are often overlooked. Similar patterns of increased threshold-high response in PTSD were shown in response to emotional stimuli, i.e., emotional numbing. As both emotional numbing and pain processing are modulated by the amygdala, we aimed to examine whether individuals diagnosed with PTSD show lower amygdala activation to pain compared with combat controls, and whether the amygdala responses to pain correlates with emotional numbing. To do so, two independent samples of veterans (original study: 44 total (20 PTSD); conceptual replication study: 40 total (20 PTSD)) underwent threat conditioning, where a conditioned stimulus (CS+; visual stimulus) was paired with an unconditioned stimulus (US; electric-shock). We contrasted the amygdala activity to the CS + US pairing with the CS+ presented alone and correlated it with emotional numbing severity. In both samples, the PTSD group showed a robust reduction in amygdala reactivity to shock compared to the Combat Controls group. Furthermore, amygdala activation was negatively correlated with emotional numbing severity. These patterns were unique to the amygdala, and did not appear in comparison to a control region, the insula, a pivotal region for the processing of pain. To conclude, amygdala response to pain is lower in individuals with PTSD, and is associated with emotional numbing symptoms. Lower amygdala reactivity to mild pain may contribute to the "all-or-none" reaction to stressful situations often observed in PTSD.

Risk Factors to Persistent Pain Following Musculoskeletal Injuries: A Systematic Literature Review

Background: Musculoskeletal (MSK) injury is one of the major causes of persistent pain. Objective: This systematic literature review explored the factors that lead to persistent pain following a MSK injury in the general population, including athletes. Methods: A primary literature search of five electronic databases was performed to identify cohort, prospective, and longitudinal trials. Studies of adults who diagnosed with a MSK injury, such as sprains, strains or trauma, were included. Results: Eighteen studies involving 5372 participants were included in this review. Participants’ ages ranged from 18–95 years. Most of the included studies were of prospective longitudinal design. Participants had a variety of MSK injuries (traumatic and non-traumatic) causing persistent pain. Multiple factors were identified as influencing the development of persistent pain following a MSK injury, including high pain intensity at baseline, post-traumatic stress syndrome, presence of medical comorbidities, and fear of movement. Scarcity of existing literature and the heterogeneity of the studies made meta-analysis not possible. Conclusions: This systematic review highlighted factors that might help predict persistent pain and disability following MSK injury in the general population, including athletes. Identification of these factors may help clinicians and other health care providers prevent the development of persistent pain following a MSK injury.

Chronic Pain Personification Following Child Abuse: The Imprinted Experience of Child Abuse in Later Chronic Pain

Child abuse has been shown to increase the risk for chronic pain. The illness personification theory implies that individuals tend to ascribe humanlike characteristics to chronic pain, and that this personification is embedded in the way they cope with their chronic condition. Recent findings demonstrate that individuals who experienced interpersonal violence tend to personify chronic pain in a way that resonates with past abusive experience. Although findings prevail to the link between trauma and the experience of the body, the personification of chronic pain among individuals who experienced child abuse has not been examined before. This article includes two studies that tested whether child abuse is implicated in abusive chronic pain personification in a young adult female sample (Study 1) and among females who experienced child abuse (Study 2). In both studies, self-report measures of child abuse, posttraumatic stress (PTS) symptoms, complex posttraumatic symptoms (disturbances of self-organization [DSO]), and abusive chronic pain personification were administered. Structural equation modeling was utilized to assess the hypotheses. The findings of the two studies showed a significant association between child abuse and pain personification. Whereas PTS symptoms did not mediate this link (Study 1), DSO symptoms mediated this association (Study 2). The findings of these studies support the understanding that the experience of interpersonal violence is engraved in the experience of the body, as reflected in abusive chronic pain personification. Disturbances in self-organization seem to underlie this process, thus pertaining to the link between the experience of the body, self, and interpersonal trauma.

Fear of pain as a predictor of concurrent and downstream PTSD symptoms

BACKGROUND

Pain anxiety has been associated with more severe posttraumatic stress disorder (PTSD) symptoms. However, the unique role of individual domains of pain anxiety has yet to be explored in the prediction of PTSD severity. This study examined whether specific pain anxiety domains (i.e., cognitive anxiety, escape/avoidance, fear of pain, and physiological anxiety) predict both concurrent and downstream PTSD symptoms above and beyond other PTSD risk factors.

METHOD

Participants were 63 survivors of traumatic events with moderate to high baseline pain treated in the emergency department and assessed for PTSD symptoms and pain anxiety at 3- and 12-months.

RESULTS

Three-month pain anxiety domains of fear of pain and physiological anxiety (inversely related) significantly predicted concurrent 3-month PTSD symptoms above and beyond other established PTSD risk factors (i.e., sex, age, pain, and trauma type). However, only 3-month fear of pain significantly predicted 12-month PTSD symptoms.

CONCLUSIONS

Findings highlight the relevance of specific pain anxiety domains in concurrent and future PTSD symptoms and suggest the importance of evaluating pain anxiety among patients with PTSD. Interventions focused on increasing willingness to experience and tolerate fear of pain may help mitigate this risk, thereby improving outcomes for individuals with acute PTSD symptoms.

Self-Rated Health Among Patients With Severe Traumatic Brain Injury and Their Close Relatives: The Role of Posttraumatic Stress Symptoms

OBJECTIVE

Severe traumatic brain injury (sTBI) is accompanied by significant declines in self-rated health (SRH). Although such deteriorations in SRH are related to various consequences of sTBI, the effect of posttraumatic reactions (i.e., posttraumatic stress [PTS] symptoms) has been tested insufficiently to date, especially among civilians. The present investigation is based on Trajectories of Recovery After Severe Traumatic brain injury-Matters In families (TRAST-MI), a unique study among civilians with sTBI and their families. Previous research revealed that civilian sTBI has effects beyond the injured patient, influencing their close relatives as well. The aim of this study was to assess the association between PTS symptoms and SRH among patients with civilian sTBI and their close relatives.

METHODS

Patients with sTBI (assessed by an Abbreviated Injury Scale of the head region score >3) and their close relatives participated in TRAST-MI. One hundred twenty-six patient-relative dyads were assessed at 3, 6, and 12 months after the injury.

RESULTS

Multilevel modeling revealed that patients' PTS symptoms were associated with consequent SRH (slope = 0.42; p < .001), and relatives' PTS symptoms were associated with their respective SRH (slope = 0.2; p = .012).

CONCLUSIONS

The findings of this study reveal that SRH of both patients with sTBI and their relatives are negatively affected by their own PTS symptoms. These findings underline the understanding that sTBI is not merely a medical trauma but rather a comprehensive psychosocial trauma, which has consequences for the whole family system.

How are pain and traumatic stress symptoms related in acute whiplash-associated disorders? An investigation of the role of pain-related fear in a daily diary study

Comorbidity of pain and posttraumatic stress disorder is well recognized, but the reason for this association is unclear. This study investigated the direction of the relationship between pain and traumatic stress and the role that pain-related fear plays, for patients with acute whiplash-associated disorder. Participants (n = 99) used an electronic diary to record hourly ratings of pain, traumatic stress, and fear of pain (FOP) symptoms over a day. Relationships between pain, traumatic stress, and pain-related fear symptoms were investigated through multilevel models including variables lagged by 1 hour. Traumatic stress was associated with previous pain, even after controlling for previous traumatic stress and current pain; current pain was not associated with previous traumatic stress. The relationship between traumatic stress and previous pain became negligible after controlling for FOP, except for traumatic stress symptoms of hyperarousal that were driven directly by pain. Overall, these results support a pain primacy model, and suggest that pain-related fear is important in the maintenance and development of comorbid pain and traumatic stress symptoms. They also confirm that traumatic stress symptoms of hyperarousal are central in this relationship. Differences between this study and others that reported mutual maintenance can be understood in terms of different stages of whiplash-associated disorder and different intervals between repeated measurements. Traumatic stress may affect pain over longer time intervals than measured in this study. Future research could explore how relationships between traumatic stress symptoms, pain, and FOP change over time, and whether previous experiences of traumatic stress influence these relationships.

"My own flesh and blood": The implications of child maltreatment for the orientation towards the body among dyads of mothers and daughters

BACKGROUND

Orientation to bodily signals reflects the ways in which individuals interpret their bodily sensations. Such orientation is formed within early interpersonal context. Findings reveal that trauma may result in catastrophic and fearful orientation towards bodily signals. However, not much is known regarding the link between trauma and orientation towards the body as manifested within a family intergenerational context.

OBJECTIVE

This study examines the link between child maltreatment, complex posttraumatic stress symptoms (CPTS symptoms), and a posttraumatic orientation to bodily signals among dyads of mothers and their young adult daughters.

PARTICIPANTS AND SETTING

194 mother-daughter dyads (mothers' mean age = 56, SD = 6.3; daughters' mean age = 26, SD = 3.03) completed self-reported questionnaires, assessing child maltreatment (CTQ), CPTS symptoms (ITQ), and orientation to bodily signals (pain catastrophizing, anxiety sensitivity-physical, body vigilance).

RESULTS

Orientation to bodily signals was associated with child maltreatment, through the mediation of CPTS symptoms among mothers (indirect effects between 0.13-0.28; p > 0.021) and daughters (indirect effects between 0.21-0.11; p > 0.032). Mothers' child maltreatment was associated with daughters' child maltreatment (effect = 0.35; p < 0.001), and mothers' orientation to bodily signals was associated with daughters' orientation (effects between 0.19-0.27; p < 0.016). Daughters' orientation to bodily signals was partially associated with mothers' child maltreatment through mothers' CPTS symptoms and orientation to body (indirect effect = 0.064; p = 0.023).

CONCLUSIONS

Child maltreatment is implicated in posttraumatic orientation towards bodily signals. Such secondary processes may be intergenerationally transmitted.

Post-Traumatic Stress Disorder Symptoms from Multiple Stressors Predict Chronic Pain in Cancer Survivors

Background: Despite the association between chronic pain and post-traumatic stress disorder (PTSD), little is known about the longitudinal course of pain and PTSD during cancer treatment. Objectives: We examined the prevalence of PTSD and chronic pain at three time periods in veterans with a diagnosis of cancer, and the relationship between the experience of pain and PTSD. Methods: Participants (N = 123) with oral-digestive cancers were recruited from the Veterans Healthcare System (age M = 65.31 and SD = 9.13; 98.4% male) and completed face to face interviews at 6, 12, and 18 months post-diagnosis. Measures included the Post-traumatic Stress Disorder Checklist-Stressor-Specific version (PCL-S), Primary care PTSD (PC-PTSD), and the Patient-Reported Outcomes Measurement Information System (PROMIS) Pain Impact Scale. Results: About one-third (26.8%) of the sample had chronic pain, defined as elevated pain at two time periods. About one-fifth (20.3%) endorsed symptoms of combat-related PTSD at 6 months, and 22.8% endorsed symptoms of cancer-related PTSD, exceeding a clinical cutoff for older adults (12 months = 21.1%, 18 months = 23.1%). Changes over time were observed for cancer-related PTSD symptom clusters of hyperarousal (F = 3.85 and p = 0.023) and emotional numbing (F = 4.06 and p = 0.018) with a statistically significant quadratic function increasing at 18 months. In logistic regression, individuals with both combat and cancer-related PTSD symptoms at six months had 8.49 times higher odds of experiencing chronic pain (χ² = 25.91 and p < 0.001; R² = 0.28). Conclusions: Persisting pain may be a concern in veterans with cancer. Individuals who have experienced traumatic events with persisting PTSD symptoms may be at elevated risk for chronic pain. Veterans with PTSD symptoms from both cancer and combat are at the highest risk to experience chronic pain.

The interaction between stress and chronic pain through the lens of threat learning

Stress and pain are interleaved at multiple levels - interacting and influencing each other. Both are modulated by psychosocial factors including fears, beliefs, and goals, and are served by overlapping neural substrates. One major contributing factor in the development and maintenance of chronic pain is threat learning, with pain as an emotionally-salient threat - or stressor. Here, we argue that threat learning is a central mechanism and contributor, mediating the relationship between stress and chronic pain. We review the state of the art on (mal)adaptive learning in chronic pain, and on effects of stress and particularly cortisol on learning. We then provide a theoretical integration of how stress may affect chronic pain through its effect on threat learning. Prolonged stress, as may be experienced by patients with chronic pain, and its resulting changes in key brain networks modulating stress responses and threat learning, may further exacerbate these impairing effects on threat learning. We provide testable hypotheses and suggestions for how this integration may guide future research and clinical approaches in chronic pain.

Examination of the stability of the anxiety sensitivity index across the menstrual cycle in trauma-exposed women with and without PTSD

Background and Objectives: Anxiety sensitivity (AS), as measured by the Anxiety Sensitivity Index (ASI), has consistently been studied as a trait-level predictor of a variety of emotional and physical health conditions, including premenstrual symptoms. The menstrual cycle influences symptom expression and stress reactivity among anxiety and stress-related disorders. However, research has yet to directly evaluate the stability of AS across the various phases of the menstrual cycle, particularly in clinical populations with high levels of AS and with documented menstrual cycle differences in symptoms such as women with posttraumatic stress disorder (PTSD).Design and Methods: The current study examined whether AS fluctuates as a function of menstrual cycle phase among a community sample of trauma-exposed women (N = 48) with and without PTSD. Participants completed the ASI, including subscales assessing sensitivity to physical, cognitive, and social symptoms of anxiety, during early follicular and mid-luteal menstrual cycle phases.Results: Results revealed that ASI scores remained relatively stable across the different phases of the menstrual cycle assessed; evidence for stability was particularly strong for the subscale assessing sensitivity to physical symptoms of anxiety.Conclusion: This study provides additional support for the conceptualization of AS as a stable, trait-like, cognitive risk factor.

Pain and posttraumatic stress disorder in refugees who survived torture: The role of pain catastrophizing and trauma-related beliefs

BACKGROUND

Traumatized refugees with comorbid pain report more severe posttraumatic stress disorder (PTSD), respond less well to PTSD-focused treatments and exhibit greater disability. A mutually maintaining relationship may exist between pain and PTSD, that may be partly accounted for by depression, but no prior studies have tested this assumption in traumatized refugees.

METHOD

Self-report measures of pain, PTSD, depression, disability, pain catastrophizing (PC) and trauma-related beliefs (TRBs) were administered to 197 refugees referred to the Danish Institute Against Torture (DIGNITY) prior to treatment. The contribution of pain, depression, PC, and TRBs to the overall variance in PTSD severity was examined. We also examined whether the relationship between pain and PTSD was mediated by PC and TRBs, after controlling for depression.

RESULTS

Depression, pain severity, PC and TRBs together accounted for 66% of the overall variance in PTSD, with depression being the primary contributor (57%). In univariate tests, both PC and TRBs significantly mediated the relationship between pain interference/severity and PTSD. However, after controlling for depression only PC mediated this relationship.

CONCLUSIONS

Negative beliefs about pain and the trauma made small, but additive contributions to the relationship between pain and PTSD severity, after controlling for depression. Longitudinal studies with refugees, involving tests of more complex mutual maintenance models, are warranted.

SIGNIFICANCE

After controlling for symptoms of depression, pain catastrophizing and negative trauma-related beliefs partly mediated the relationship between pain and PTSD in tortured refugees. The results suggest that all three variables are important in a mutual mediation model of pain and PTSD, and as targets for treatment, in traumatized refugees.

Do post-traumatic pain and post-traumatic stress symptomatology mutually maintain each other? A systematic review of cross-lagged studies

After traumatic exposure, individuals are at risk of developing symptoms of both pain and post-traumatic stress disorder (PTSD). Theory and research suggest a complex and potentially mutually maintaining relationship between these symptomatologies. However, findings are inconsistent and the applied methods are not always well suited for testing mutual maintenance. Cross-lagged designs can provide valuable insights into such temporal associations, but there is a need for a systematic review to assist clinicians and researchers in understanding the nature of the relationship. Thus, the aim of this systematic review was to identify, critically appraise, and synthesize results from cross-lagged studies on pain and PTSD symptomatology to assess the evidence for longitudinal reciprocity and potential mediators. Systematic searches resulted in 7 eligible studies that were deemed of acceptable quality with moderate risk of bias using the cohort study checklist from Scottish Intercollegiate Guidelines Network. Furthermore, synthesis of significant pathways in the cross-lagged models showed inconsistent evidence of both bidirectional and unidirectional interaction patterns between pain and PTSD symptomatology across time, hence not uniformly supporting the theoretical framework of mutual maintenance. In addition, the synthesis suggested that hyperarousal and intrusion symptoms may be of particular importance in these cross-lagged relationships, while there was inconclusive evidence of catastrophizing as a mediator. In conclusion, the findings suggest an entangled, but not necessarily mutually maintaining relationship between pain and PTSD symptomatology. However, major variations in findings and methodologies complicated synthesis, prompting careful interpretation and heightening the likelihood that future high-quality studies will change these conclusions.

Cultural Predictors of Resilience in a Multinational Sample of Trauma Survivors

The present study aims to fill a gap in the study of resilience to trauma by examining resilience in a culturally diverse population. Approximately 70% of adults across the globe experience at least one traumatic event in their lifetime, yet resilience is a common response trajectory. This pilot study explored reactions to trauma and psychological resilience in an international sample of trauma-exposed participants. Participants were recruited online using the Amazon Mechanical Turk software and after completing an informed consent, were determined eligible to participate if they endorsed experiencing at least one traumatic event. Eligible participants then completed The Stressful Life Events Questionnaire, Brief Resiliency Scale, Ego Resiliency Scale, Posttraumatic Stress Disorder Checklist-Civilian Version, Brief Religious Coping Scale, and Multigroup Ethnic Identity Measure. The final sample included 200 trauma exposed adults from nineteen different countries worldwide, with a majority hailing from the United States, India, Sri Lanka and the Philippines. Results revealed that Asian participants scored significantly higher on resilience scales and endorsed higher levels of spiritually focused coping than other subgroups. Multivariate analyses revealed that these differences in resilience remained significant even after controlling for sense of ethnic identity and spiritual coping, suggesting that there may be culturally specific predictors of resilience within the Asian subgroup. Understanding variations in resilience will aid in developing culturally tailored interventions and pursuing a strengths-based approach to recovery from trauma. Limitations and implications are discussed.

One 'knows': self-rated health and telomere length among ex-prisoners of war

OBJECTIVE

Ill-health and early mortality are amongst the most significant ramifications of trauma. Furthermore, trauma alters the subjective perception and experience of the body. The aim of this study is to examine the extent to which deteriorations in perceived health among traumatised individuals are associated with cellular health as manifested in telomere length.

METHODS

Specifically, 88 former prisoners of war (ex-POWs) evaluated their health (self-rated health; SRH) at 18 (T1), 35 (T2) and 42 (T3) years after the war, and were assessed for telomere length at T3. Health behaviour, BMI, morbidity and PTSD were also examined at T3.

RESULTS

The findings demonstrated that SRH was cross-sectionally correlated with telomere length. Furthermore, a significant sequential indirect effect was found, in which worse SRH in T1 was associated with shorter telomere length at T3, through worse SRH at T2 and at T3.

CONCLUSIONS

These findings demonstrate that long-term deteriorations in the subjective evaluations of health are implicated in actual cellular health among individuals exposed to trauma.

Psychometric validation of the Serbian version of the Fear Avoidance Component Scale (FACS)

OBJECTIVE

The Fear Avoidance Components Scale (FACS) is a new patient-reported outcome (PRO) questionnaire designed to comprehensively evaluate fear avoidance (FA) beliefs and attitudes in persons with painful medical conditions. The original English version has demonstrated acceptable psychometric properties, including concurrent and predictive validity. Two factors have been identified: 1. general fear avoidance; and 2. types of activities that are avoided.

METHODS

The FACS was first translated into Serbian, and then psychometrically validated. A cohort of 322 chronic musculoskeletal pain subjects completed the FACS-Serb and additional FA-related patient-reported outcome (PRO) measures. Their FACS-Serb scores were then compared to a cohort of 68 acute pain subjects.

RESULTS

Test-retest reliability (ICC2,1 = 0.928) and internal consistency for both Factors (Cronbach α 0.904 and 0,880 respectively) were very good. An acceptable fit was found with a confirmatory factor analysis of the 2-factor model found with the original English version of the FACS. Strong associations were found among FACS-Serb scores and other PRO measures of pain catastrophizing, depressive/anxiety symptoms, perceived disability, and pain intensity (p<0.001 for all analyses). FACS-Serb total scores, separate Factor scores, and subjective pain ratings were significantly higher in the chronic vs. acute pain cohorts (p<0.001 for all analyses).

CONCLUSIONS

The FACS-Serb demonstrated strong psychometric properties, including strong reliability and internal consistency, criterion validity (through associations with other FA-related PRO measures), and discriminant validity (through comparisons with a separate acute pain cohort). The FACS-Serb appears to be a potentially useful pain-related assessment tool.

Posttraumatic Stress Disorder, Orientation to Pain, and Pain Perception in Ex-Prisoners of War Who Underwent Torture

OBJECTIVE

Studies suggest that torture survivors often experience long-term chronic pain and increased pain perception. However, it is unclear whether the actual experience of torture or rather the subsequent posttraumatic stress disorder (PTSD) explains these pain problems. Furthermore, although catastrophic and fearful orientations to pain have been suggested to play a significant role in the association between trauma and pain, the underlying mechanisms remain unclear. This study examined whether chronic pain and pain perception among torture survivors are associated with torture experience or PTSD and whether catastrophic and fearful orientations mediate or moderate these associations.

METHODS

Fifty-nine ex-prisoners of war who underwent torture and 44 matched veterans participated in this study. Pain perception was evaluated by assessing pain threshold and reactivity to experimental suprathreshold noxious stimuli. Participants completed self-administered questionnaires assessing PTSD, chronic pain, pain catastrophizing, and fear of pain.

RESULTS

Although chronic pain was associated with PTSD (0.44 < β < 0.49, p < .002), increased pain perception was correlated with torture (0.33 < β < 0.65, p < .05). Pain catastrophizing was found to mediate the association between PTSD and chronic pain (β = 0.18 and 0.19, respectively; p < .05). Fear of pain moderated the association between torture and pain perception (β = 0.41 and 0.42, respectively; p < .017).

CONCLUSIONS

The findings suggest that chronic pain is contingent upon the psychological toll of torture, that is, PTSD. This study also indicates that PTSD exacerbates catastrophic orientation, which in turn may amplify chronic pain. Reactivity to experimental noxious stimuli was related to previous experiences of torture, which enhances perceived pain intensity when interacting with a fearful pain orientation. These findings highlight the significance of orientation to bodily experiences after trauma.

Association of Neglect-Like Symptoms with Anxiety, Somatization, and Depersonalization in Complex Regional Pain Syndrome

Background

Many patients with complex regional pain syndrome (CRPS) report some foreignness of the affected limb, which is referred to as "neglect-like symptoms" (NLS). Despite similarities of the NLS reports to symptoms of body image disturbances in mental disorders, no study has been conducted to examine such associations.

Methods

We investigated 50 patients with CRPS and 45 pain control patients (N = 27, chronic limb pain; N = 18, migraine headache). NLS, anxiety, depression, depersonalization, and somatization were assessed using validated questionnaires.

Results

Seventy-two percent of the CRPS patients reported at least one NLS vs 29.6% and 33.3% in the two patient control groups. In limb pain controls, NLS correlated with pain intensity. In CRPS patients, NLS correlated with anxiety (rho = 0.658, P  < 0.001), somatization (rho = 0.616, P  < 0.001), depersonalization (rho = 0.634, P  < 0.001), and pain catastrophizing (rho = 0.456, P  < 0.01), but not with intensity of pain, duration of pain, or pain disability.

Conclusions

In CRPS patients, NLS could be a result of somatization, depression, anxiety, and depersonalization, but probably not of pain. Whether these associations are causative must be clarified in longitudinal psychological studies.

The role of posttraumatic stress symptoms on chronic pain outcomes in chronic pain patients referred to rehabilitation

Objectives

Posttraumatic stress symptoms (PTSS) are highly prevalent in chronic pain patients and may affect pain symptomatology negatively, but there is still a great need to explore exactly how this occurs. Therefore, this study investigated differences in pain intensity, pain-related disability, and psychological distress between chronic pain patients not exposed to a trauma, patients exposed to a trauma with no PTSS, and patients exposed to a trauma with PTSS. Moreover, the moderating effects of PTSS on the associations between pain intensity and pain-related disability and psychological distress were investigated.

Methods

In this cross-sectional cohort study, data were consecutively collected over the course of a year in patients with chronic non-malignant pain referred for multidisciplinary pain rehabilitation at a Danish university hospital pain center using questionnaires assessing pain, pain-related disability, PTSS, anxiety, and depression.

Results

The final sample consisted of 682 chronic pain patients, who were divided into three subgroups (no trauma, 40.6%; trauma/no PTSS, 40.5%; trauma/PTSS, 18.9%). Chronic pain patients with PTSS reported significantly higher levels of pain intensity, pain-related disability, depression, and anxiety compared to chronic pain patients without a trauma and chronic pain patients without PTSS. Moreover, PTSS significantly moderated the associations between pain intensity and pain-related psychosocial disability, depression, and anxiety.

Conclusion

These results highlight the importance of assessing PTSS in chronic pain patients and suggest that PTSS have a specific influence on the association between pain intensity and more psychosocial aspects of the pain condition.

The traumatized body: Long-term PTSD and its implications for the orientation towards bodily signals

Orientation to bodily signals is defined as the way somatic sensations are attended, perceived and interpreted. Research suggests that trauma exposure, particularly the pathological reaction to trauma (i.e., PTSD), is associated with catastrophic and frightful orientation to bodily signals. However, little is known regarding the long-term ramifications of trauma exposure and PTSD for orientation to bodily signals. Less is known regarding which PTSD symptom cluster manifests in the 'somatic route' through which orientation to bodily signals is altered. The current study examined the long-term implications of trauma and PTSD trajectories on orientation to bodily signals. Fifty-nine ex-prisoners of war (ex-POWs) and 44 controls were assessed for PTSD along three time-points (18, 30 and 35 years post-war). Orientation to bodily signals (pain catastrophizing and anxiety sensitivity-physical concerns) was assessed at T3. Participants with a chronic PTSD trajectory had higher pain catastrophizing compared to participants with no PTSD. PTSD symptom severity at T2 and T3 mediated the association between captivity and orientation. Among PTSD symptom clusters, hyperarousal at two time-points and intrusion at three time-point mediated the association between captivity and orientation. These findings allude to the cardinal role of long-term PTSD in the subjective experience of the body following trauma.

Number and Type of Post-Traumatic Stress Disorder Symptom Domains Are Associated With Patient-Reported Outcomes in Patients With Chronic Pain

Post-traumatic stress disorder (PTSD) commonly accompanies complex chronic pain, yet PTSD is often overlooked in chronic pain management. Using the 4-item Primary Care (PC)-PTSD screening tool, we evaluated the relationship between the number and type of PC-PTSD symptoms endorsed and a set of patient-reported outcomes, including: pain intensity and interference, function, mood, quality of life, and substance abuse risk in a consecutive sample of patients with chronic pain (n = 4,402). Patients completed PainTracker, a Web-based patient-reported outcome tool that provides a multidimensional evaluation of chronic pain, as part of their intake evaluation at a specialty pain clinic in a community setting. Twenty-seven percent of the sample met PC-PTSD screening criteria for PTSD by endorsing 3 of the 4 symptom domains. Significant ordinal trends were observed between increasing number of PTSD symptoms and all outcomes evaluated. The occurrence of even 1 PTSD symptom was associated with overall poorer outcomes, suggesting that subsyndromal PTSD is clinically significant in the context of chronic pain. Among the 4 PTSD domains assessed, "numbness/detachment" was most strongly associated with negative pain outcomes in relative weight analysis. Results from this cross-sectional study suggest that a range of pain-related outcomes may be significantly related to comorbid PTSD.

PERSPECTIVE

We present evidence that PTSD symptoms are significantly related to a broad set of pain-related patient-reported outcomes. These findings highlight the need to evaluate for PTSD symptoms in patients with chronic pain, especially feelings of numbness or detachment from others, to improve understanding and management of chronic pain.

A meta-analysis of fear-avoidance and pain intensity: The paradox of chronic pain

Background

The fear-avoidance model of chronic pain has established avoidance as a predictor of negative outcomes in chronic pain patients. Avoidance, or deliberate attempts to suppress or prevent unwanted experiences (e.g., pain), has been studied extensively, with multiple reviews implicating this behavior as a predictor of disability, physical disuse, and depression. Despite hundreds of studies examining the associations between different components of this model (i.e., catastrophizing, fear, avoidance, depression), the association between fear-avoidance and pain intensity has remained unclear. The present study seeks to clarify this association across samples.

Method

The present analyses synthesize the literature (articles from PsycInfo, PubMed, and ProQuest) to determine if fear-avoidance and pain intensity are consistently correlated across studies, samples, and measures. Eligible studies measured pain intensity and fear-avoidance cross-sectionally in chronic pain patients. The search resulted in 118 studies eligible for inclusion. A random-effects model was used to estimate the weighted mean effect size. Comprehensive Meta-Analysis software was used for all analyses. Moderation analyses elucidate the variables that affect the strength of this association. Meta-regression and meta-ANOVA analyses were conducted to examine moderating variables. Moderator variables include demographic characteristics, pain characteristics, study characteristics, and national cultural characteristics (using Hofstede’s cultural dimensions). Publication bias was examined using the funnel plot and the p-curve.

Results

Results indicate a small-to-moderate positive association between fear-avoidance and pain intensity. The results were stable across characteristics of the sample, including mean age, gender distribution, marital status, and duration of pain. Moderation analyses indicate that the measures utilized and cultural differences affect the strength of this association. Weaker effect sizes were observed for studies that utilized measures of experiential avoidance when compared to studies that utilized pain-specific fear-avoidance measures. Studies that utilized multiple measures of fear-avoidance had stronger effect sizes than studies that utilized a single measure of fear-avoidance. Three of Hofstede’s cultural dimensions moderated the association, including Power Distance Index, Individualism versus Collectivism, and Indulgence versus Restraint.

Conclusions

The present meta-analysis synthesizes the results from studies examining the association between fear-avoidance and pain intensity among individuals with chronic pain. The positive association indicates that those with increased fear-avoidance have higher pain intensity, and those with higher pain intensity have increased fear-avoidance. Findings indicate that cultural differences and measurement instruments are important to consider in understanding the variables that affect this association. The significant cultural variations may indicate that it is important to consider the function of avoidance behavior in different cultures in an effort to better understand each patient’s cultural beliefs, as well as how these beliefs are related to pain and associated coping strategies.

Implications

The results from the current meta-analysis can be used to inform interventions for patients with chronic pain. In particular, those with more intense pain or increased fear-avoidance should be targeted for prevention and intervention work. Within the intervention itself, avoidance should be undermined and established as an ineffective strategy to manage pain in an effort to prevent disability, depression, and physical deconditioning.

Post-traumatic stress symptoms in children and adolescents with chronic pain: A topical review of the literature and a proposed framework for future research

BACKGROUND AND OBJECTIVE

The co-occurrence of chronic pain and post-traumatic stress symptoms (PTSS) and post-traumatic stress disorder (PTSD) has gained increasing research attention. Studies on associations among pain and PTSS or PTSD in youth have largely been conducted in the context of acute injury or trauma. Less is known about the risk for co-occurrence with paediatric chronic pain. In this review, we (1) propose a conceptual framework to outline factors salient during childhood that may be associated with symptom severity, co-occurrence and mutual maintenance, (2) present relevant literature on PTSS in youth with acute and chronic pain and identify research gaps and (3) provide recommendations to guide paediatric research examining shared symptomatology.

DATABASES AND DATA TREATMENT

Electronic databases (PubMed and Google Scholar) were used to identify relevant articles using the search terms 'child, adolescent, paediatric, chronic pain, acute pain, post-traumatic stress symptoms and post-traumatic stress disorder'. Studies were retrieved and reviewed based on relevance to the topic.

RESULTS

Our findings revealed that existing biobehavioural and ecological models of paediatric chronic pain lack attention to traumatic events or the potential development of PTSS. Paediatric studies are also limited by lack of a conceptual framework for understanding the prevalence, risk and trajectories of PTSS in youth with chronic pain.

CONCLUSIONS

Our new developmentally informed framework highlights individual symptoms and shared contextual factors that are important when examining potential associations among paediatric chronic pain and PTSS. Future studies should consider bidirectional and mutually maintaining associations, which will be aided by prospective, longitudinal designs. WHAT DOES THIS REVIEW ADD?: This review presents relevant literature on pain and PTSS in youth and proposes a conceptual framework to examine factors salient during childhood that may be associated with symptom severity, comorbidity and mutual maintenance of chronic pain and PTSS in paediatric populations. We highlight dynamic factors that may change across children's development and provide recommendations to guide paediatric research examining potential associations among PTSS and chronic pain.

Injury-related fear-avoidance and symptoms of posttraumatic stress in parents of children with burns

Parents of children with burns experience a range of psychological reactions and symptoms, and parents' health is known to impact children's health. So far, there is little research into potential mechanisms that maintain parents' symptoms. The aim was to investigate parental injury-related fear-avoidance, and its associations with injury severity and health measures. Parents (n=107) of children aged 0.4-18 years that sustained burns 0.1-9.0 years previously completed questionnaires on fear-avoidance, posttraumatic stress, and health of the child. Analyses showed that the average level of fear-avoidance was low and positively associated with measures of injury severity and parents' symptoms of posttraumatic stress, and negatively associated with parents' ratings of their child's health. In two separate multiple regressions with parents' symptoms of PTSD and the child's health as dependent variables, fear-avoidance made the largest contribution in both models while injury severity was non-significant. Results were not related to comorbid conditions of the child, scarring, or parent-related socio-demographic variables. In summary, injury-related fear-avoidance is more likely among parents whose children sustain more severe burns. In turn, fear-avoidance contributes significantly to parents' symptoms of PTSD and to poorer health ratings regarding the child, irrespective of injury severity or child comorbidity.

How women perceive abortion care: A study focusing on healthy women and those with mental and posttraumatic stress

Objectives To identify perceived deficiencies in the quality of abortion care among healthy women and those with mental stress. Methods This multi-centre cohort study included six obstetrics and gynaecology departments in Sweden. Posttraumatic stress (PTSD/PTSS) was assessed using the Screen Questionnaire-Posttraumatic Stress Disorder; anxiety and depressive symptoms, using the Hospital Anxiety Depression Scale; and abortion quality perceptions, using a modified version of the Quality from the Patient's Perspective questionnaire. Pain during medical abortion was assessed in a subsample using a visual analogue scale. Results Overall, 16% of the participants assessed the abortion care as being deficient, and 22% experienced intense pain during medical abortion. Women with PTSD/PTSS more often perceived the abortion care as deficient overall and differed from healthy women in reports of deficiencies in support, respectful treatment, opportunities for privacy and rest, and availability of support from a significant person during the procedure. There was a marginally significant difference between PTSD/PTSS and the comparison group for insufficient pain alleviation. Conclusions Women with PTSD/PTSS perceived abortion care to be deficient more often than did healthy women. These women do require extra support, relatively simple efforts to provide adequate pain alleviation, support and privacy during abortion may improve abortion care.

Trauma and posttraumatic stress disorder in transcultural patients with chronic pain

BACKGROUND

Traumatic events are commonly experienced in the general population and can lead to both psychological and physical consequences. While some may process the experienced event without developing trauma related symptoms in the long term, others develop persistent symptomatology in the form of chronic pain depending on the type of trauma as well as various other risk factors.

OBJECTIVE

The aim of this study was to examine the relationship of the number of lifetime traumas and chronic pain in a sample of transcultural patients to further develop existing research highlighting an association between the number of traumas and chronic pain that may be independent of a categorical diagnosis of PTSD.

METHODS

Using a case-control design, this study compared 29 chronic pain patients (Gerbershagen II/III) born in former Yugoslavia (21 female; age: 52.5 years, SD 7.3) to 21 patients of a general psychiatric sample who were matched by age- (±5 years), migratory-background, and gender. The number of traumas and PTSD symptomatology were assessed using the Harvard Trauma Questionnaire (HTQ). Somatisation, social dysfunction and anxiety were assessed by the General Health Questionnaire 28 (GHQ-28). The Beck Depression Inventory (BDI) was used to determine the presence of depression.

RESULTS

96.9 % of the chronic pain patients reported at least one traumatic event compared to 76.2 % within the control group (p = 0.029). Likewise, the mean number of reported traumas was significantly higher among the chronic pain group at 12 vs. 7 respectively (p = 0.024). Regarding anxiety, depression and social dysfunction, no significant difference between the two groups was found.

CONCLUSIONS

Chronic pain patients with migratory background report an unusually high number of traumatic events. Clinicians should carefully screen for trauma history in this group of patients. The present study supports prior research suggesting a cumulative effect of trauma on chronic pain.