Association between attentional bias to experimentally induced pain and to pain-related words in healthy individuals: the moderating role of interpretation bias.

ABSTRACT: Attentional bias to pain-related information may contribute to chronic pain maintenance. It is theoretically predicted that attentional bias to pain-related language derives from attentional bias to painful sensations; however, the complex interconnection between these types of attentional bias has not yet been tested. This study aimed to investigate the association between attentional bias to pain words and attentional bias to the location of pain, as well as the moderating role of pain-related interpretation bias in this association. Fifty-four healthy individuals performed a visual probe task with pain-related and neutral words, during which eye movements were tracked. In a subset of trials, participants were presented with a cold pain stimulus on one hand. Pain-related interpretation and memory biases were also assessed. Attentional bias to pain words and attentional bias to the pain location were not significantly correlated, although the association was significantly moderated by interpretation bias. A combination of pain-related interpretation bias and attentional bias to painful sensations was associated with avoidance of pain words. In addition, first fixation durations on pain words were longer when the pain word and cold pain stimulus were presented on the same side of the body, as compared to on opposite sides. This indicates that congruency between the locations of pain and pain-related information may strengthen attentional bias. Overall, these findings indicate that cognitive biases to pain-related information interact with cognitive biases to somatosensory information. The implications of these findings for attentional bias modification interventions are discussed.

Online paediatric chronic pain management: assessing the needs of UK adolescents and parents, using a cross-sectional survey.

BACKGROUND: Adolescent chronic pain is prevalent, and interdisciplinary treatment is recommended. Although it is well known that technology is a key part of adolescents' daily lives, there have not been any online, interdisciplinary interventions developed for adolescents with chronic pain in a UK healthcare context. Little is known about how adolescents currently use online resources to manage chronic pain, or what guidance they seek. METHODS: Ninety-five participants from the community answered this mixed-methods, online survey (adolescent n = 54, parent n = 41), which assessed the needs of UK-based adolescents for a new online chronic pain management resource. RESULTS: Findings indicated that, at the time of the survey, adolescents frequently used social media platforms, such as Instagram, for chronic pain management. Desired techniques for a new interdisciplinary resource for adolescents included 'advice on explaining chronic pain to others' (86.7% of adolescents) and sleep hygiene (82.2% of adolescents), though access to a range of pain management techniques was desired. Qualitative results indicated endorsement of a new programme by adolescents and parents. CONCLUSIONS: Adolescents and parents had a positive outlook towards the development of a UK-specific online resource to help manage chronic pain. Such an intervention should aim to be made accessible via the National Health Service. Adolescent use of social media platforms to seek support for chronic pain requires further exploration in future research.

Online multidisciplinary interventions for paediatric chronic pain: A content analysis.

BACKGROUND: Many online interventions for paediatric chronic pain have been developed and evaluated. In accordance with the biopsychosocial model, the recommended treatment approach for chronic pain is multidisciplinary. Despite this, multidisciplinary components within existing online interventions have not been examined. The objective of the present review was to summarise and evaluate the content of existing online interventions for paediatric chronic pain by mapping intervention content to evidence-based guidelines for chronic pain management. METHODS: Interventions were identified using an updated systematic review. Nine chronic pain management strategies that reflect evidence-based guidance for multidisciplinary chronic pain management were defined by the authors, examples of which include 'pain education', 'activity pacing' and 'physiotherapy'. Identified interventions were then coded against the target strategies. These codes were compiled descriptively to provide an overview of how well each chronic pain management strategy was represented across the dataset, and which interventions represented the most strategies. RESULTS: Thirty-five articles, relating to 13 unique interventions for paediatric chronic pain management were identified; few encompassed a complete multidisciplinary approach. Many CBT-based interventions included multidisciplinary elements. Across interventions, physiotherapy and non-pharmacological physical therapies were the least represented chronic pain management strategies. CONCLUSIONS: The content analysis revealed a lack of online interventions encompassing complete multidisciplinary pain management. It is important that new interventions for paediatric chronic pain management are evidence-based and reflect current best practice guidelines. Established intervention development approaches should be utilised and include a process evaluation to help identify which intervention components are effective in which contexts. SIGNIFICANCE: This content analysis of online interventions for paediatric chronic pain highlights the need for multidisciplinary practices in pain management to be translated into online interventions. Improving the availability of pain management resources is essential for many families who cannot attend specialist pain clinics, particularly in the context of the COVID-19 pandemic. There is potential for new resources, as well as for established resources, to be further developed to deliver a broader range of pain management content.

A Systematic Review of Measures of Breakthrough Pain and Their Psychometric Properties.

CONTEXT: Breakthrough pain (BTP) is common in cancer and other conditions yet there is a lack of validated BTP measurement tools. OBJECTIVES: We aimed to identify all tools assessing or characterising BTP in patients of any age with any condition, and to critically appraise their psychometric properties. METHODS: The Cochrane Library, PROSPERO, Embase, CINAHL, Medline, PsycINFO, Web of Science, Google Scholar, ProQuest, Evidence Search and OpenGrey were searched to identify all available tools used to assess BTP. A second search identified studies that had evaluated psychometric properties of tools identified in Search 1. Databases were searched from inception to November 2020. Studies were assessed using COSMIN criteria and GRADE guidelines. RESULTS: Search 1 found 51 tools used to assess BTP. Search 2 found six tools that had a development study and/or a study evaluating a tool psychometric property. No tool had more than one study evaluating psychometric properties so a meta-analysis could not be conducted. Studies were of inadequate to very good quality. Only the Breakthrough Pain Assessment Tool (BAT) had sufficient content validity and at least low-quality evidence for sufficient internal consistency. CONCLUSION: The BAT is recommended to characterise BTP in adults with cancer; its applicability to other conditions is unknown. The remaining tools need further evaluation. Only the Breakthrough Pain Questionnaire for Children was designed for children with cancer, but no psychometric properties were evaluated. There is a need for a tool to assess and characterise BTP in children with non-cancer diagnoses and those who cannot self-report.

Attentional bias to somatosensory stimuli in chronic pain patients: a systematic review and meta-analysis.

ABSTRACT: This systematic review and meta-analysis aimed to evaluate the evidence pertaining to attentional bias for painful and nonpainful somatosensory stimuli in individuals with chronic pain. Eligible studies were identified through searches of Medline, PsycINFO, CINAHL, Web of Science, Scopus, and Cochrane Library databases. Search terms were words and phrases organised into 3 concept blocks: pain condition, cognitive process, and stimuli/paradigm. The search identified 29 eligible studies (reporting 32 eligible experiments), of which quantitative meta-analysis was possible for 16 studies (19 experiments). The meta-analysis found that chronic pain patients, excluding somatoform pain patients, showed significantly greater attentional bias to stimuli in the somatosensory modality than healthy controls (k = 9, g = 0.34). In addition, meta-analysis of studies that used a temporal order judgement task found that patients with unilateral chronic pain showed a spatial attentional bias away from somatosensory stimuli (k = 7, effect estimate = 22.43 ms) and visual stimuli (k = 2, effect estimate = 13.75 ms) on or near the painful body side. Most studies of attentional bias to the somatosensory modality recruited samples of patients with fibromyalgia, whereas most studies of spatial attentional bias assessed patients with complex regional pain syndrome. The extent to which these results generalise to other pain conditions is therefore unclear. We recommend future research test spatial and modality attentional biases across chronic pain conditions and examine the psychometric properties of attentional bias measurement paradigms for use with chronic pain populations. PROSPERO registration number CRD42019124510.

A systematic review with subset meta-analysis of studies exploring memory recall biases for pain-related information in adults with chronic pain.

Pain-related memory biases have been frequently explored in individuals with chronic pain, and along with attentional and interpretation biases are hypothesised to contribute to the onset and/or maintenance of chronic pain. The aim of this review is to provide a systematic review and synthesis of studies exploring memory recall biases for pain-related information in individuals with chronic pain relative to healthy controls and the recall of neutral information. Studies were identified through a search of Medline, PsychINFO, Web of Science, CINAHL, Cochrane Library, and Open Grey databases. Search terms were memory, recall, recognition, and bias*, intersected with pain. Eighteen studies meeting the inclusion criteria were included. Subset meta-analyses are also reported from 12 studies with relevant between-groups data (comparing recall in chronic pain vs healthy control groups) and 12 studies with relevant within-groups data (eg, comparing recall of pain-related/emotional vs neutral words). Between-groups analysis revealed significantly weaker recall bias for affective-pain words in individuals with chronic pain relative to healthy controls, but only when nondepressed chronic pain individuals were included. No significant differences were found between groups in the recall of sensory-pain, illness-related, or depression-related words. Within-groups analysis revealed individuals with chronic pain show a significant recall bias favouring sensory-pain words relative to neutral and affective-pain words, and a bias for illness-related words relative to depression-related words. A recall bias favouring neutral words was found in healthy individuals. Evidence for the presence of pain-related memory biases in patients with chronic pain is inconclusive. Further methodologically rigorous research is required.

A mixed-methods systematic review and meta-analysis of barriers and facilitators to paediatric symptom management at end of life.

BACKGROUND: Symptom management for infants, children and young people at end of life is complex and challenging due to the range of conditions and differing care needs of individuals of different ages. A greater understanding of these challenges could inform the development of effective interventions. AIM: To investigate the barriers and facilitators experienced by patients, carers and healthcare professionals managing symptoms in infants, children and young people at end of life. DESIGN: A mixed-methods systematic review and meta-analysis was undertaken (PROSPERO ID: CRD42019124797). DATA SOURCES: The Cochrane Library, PROSPERO, CINAHL, MEDLINE, PsycINFO, Web of Science Core Collection, ProQuest Dissertations & Theses Database, Evidence Search and OpenGrey were electronically searched from the inception of each database for qualitative, quantitative or mixed-methods studies that included data from patients, carers or healthcare professionals referring to barriers or facilitators to paediatric end-of-life symptom management. Studies underwent data extraction, quality appraisal, narrative thematic synthesis and meta-analysis. RESULTS: A total of 64 studies were included (32 quantitative, 18 qualitative and 14 mixed-methods) of medium-low quality. Themes were generated encompassing barriers/facilitators experienced by carers (treatment efficacy, treatment side effects, healthcare professionals' attitudes, hospice care, home care, families' symptom management strategies) and healthcare professionals (medicine access, treatment efficacy, healthcare professionals' demographics, treatment side effects, specialist support, healthcare professionals' training, health services delivery, home care). Only one study included patients' views. CONCLUSION: There is a need for effective communication between healthcare professionals and families, more training for healthcare professionals, improved symptom management planning including anticipatory prescribing, and urgent attention paid to the patients' perspective.

Eye-movement behaviours when viewing real-world pain-related images.

BACKGROUND: Pain-related cues are evolutionarily primed to capture attention, although evidence of attentional biases towards pain-related information is mixed in healthy individuals. The present study explores whether healthy individuals show significantly different eye-movement behaviours when viewing real-world pain-related scenes compared to neutral scenes. The effect of manipulating via written information the threat value of the pain-related scenes on eye-movement behaviours was also assessed. METHODS: Participants were randomized to threatening (n = 28) and non-threatening (n = 27) information conditions. All completed a free-viewing task with real-world pain-related and neutral images while their eye movements were recorded. RESULTS: Participants made significantly fewer fixations of significantly longer duration when viewing pain-related images compared to neutral images. No significant differences were found between threatening and non-threatening information groups in their pattern of eye movements. CONCLUSIONS: This study shows that healthy individuals demonstrate attentional biases to pain-related real-world complex images compared to neutral images. Future research is needed to establish the implications of these biases, particularly in the context of acute pain, on the onset and/or subsequent maintenance of chronic pain conditions. SIGNIFICANCE: Healthy individuals show different eye-movement behaviours when viewing pain-related scenes than neutral scenes, supporting evolutionary accounts of pain. Implications for the onset and/or maintenance of chronic pain need to be explored.

Attentional, interpretation and memory biases for sensory-pain words in individuals with chronic headache.

INTRODUCTION: Cognitive biases in attention, interpretation and less consistently memory have been observed in individuals with chronic pain and play a critical role in the onset and maintenance of chronic pain. Despite operating in combination cognitive biases are typically explored in isolation. AIM: The primary aim of this study was to explore attentional, interpretation and memory biases and their interrelationship in individuals with chronic headache. METHODS: Twenty-eight participants with chronic headache and 34 healthy controls completed paradigms assessing attentional, interpretation and memory biases with ambiguous sensory-pain and neutral words. RESULTS: Individuals with chronic pain showed significantly greater pain-related attentional and interpretation biases relative to controls, with no differences in memory bias. No significant correlation was found between any of the three forms of cognitive bias assessed. DISCUSSION AND CONCLUSION: The clinical implications of cognitive biases in individuals with chronic pain remain to be fully explored, although one avenue for future research would be specific investigation of the implications of biased interpretations considering the consistency of results found across the literature for this form of bias.

The effectiveness of online pain resources for health professionals: a systematic review with subset meta-analysis of educational intervention studies.

Online educational interventions are increasingly developed for health professionals and students, although graduate and undergraduate medical curricula often contain limited information about how to assess and manage pain. This study reviews the literature on the effectiveness of pain-related online educational resources. Studies were identified through a search of Medline, PsychINFO, Web of Science, CINAHL, PubMed, Scopus, Cochrane Library, Google Scholar, and OpenGrey databases. Search terms included 3 concept blocks: (1) type of intervention-online education, computer-based, e-learning, web-based, and internet-based; (2) population-pediatrician, physician, nurse, psychologist, and medical; and (3) outcome-pain*. Thirty-two studies (13 randomised controlled trials, 5 nonrandomised controlled trials, and 14 single-group pre-post studies) were included. Ten provided data for inclusion in a series of between-groups meta-analyses. After intervention, participants receiving online instruction had significantly greater knowledge compared with those receiving training as usual/alternative training (Hedges' g = 0.80, 95% confidence interval [CI]: 0.12-1.49), and students had significantly greater skills compared with students receiving training as usual (g = 1.34, CI: 0.38-2.30). No significant differences were found for confidence/competence (g = 0.02, CI: -0.79 to 0.84) or attitudes/beliefs (g = 0.16, CI: -0.48 to 0.79). Although online educational resources show promise in improving learner knowledge, considerable heterogeneity exists between studies in quality, design, educational content, and outcomes. Furthermore, methodologically robust RCTs are required to establish the effectiveness of online educational interventions and a greater understanding of the key features of successful online resources, including cognitive interactivity. Few studies assessed health outcomes for patients, remaining a major priority for future investigations.

Combined cognitive biases for pain and disability information in individuals with chronic headache: A preliminary investigation.

Pain-related cognitive biases have been demonstrated in chronic pain patients, yet despite theoretical predictions are rarely investigated in combination. Combined cognitive biases were explored in individuals with chronic headache ( n = 17) and pain-free controls ( n = 20). Participants completed spatial cueing (attentional bias), sentence generation (interpretation bias) and free recall tasks (memory bias), with ambiguous sensory-pain, disability and neutral words. Individuals with chronic headache, relative to controls, showed significantly greater interpretation and memory biases favouring ambiguous sensory-pain words and interpretation bias favouring ambiguous disability words. No attentional bias was found. Further research is needed exploring the temporal pattern of cognitive biases.

A Systematic Review of Experimental Paradigms for Exploring Biased Interpretation of Ambiguous Information with Emotional and Neutral Associations.

Interpretation biases have been extensively explored in a range of populations, including patients with anxiety and depressive disorders where they have been argued to influence the onset and maintenance of such conditions. Other populations in which interpretation biases have been explored include patients with chronic pain, anorexia nervosa, and alcohol dependency among others, although this literature is more limited. In this research, stimuli with threatening/emotional and neutral meanings are presented, with participant responses indicative of ambiguity resolution. A large number of paradigms have been designed and implemented in the exploration of interpretation biases, some varying in minor features only. This article provides a review of experimental paradigms available for exploring interpretation biases, with the aim to stimulate and inform the design of future research exploring cognitive biases across a range of populations. A systematic search of the experimental literature was conducted in Medline, PsychINFO, Web of Science, CINAHL, and Cochrane Library databases. Search terms were information, stimuli, and ambiguous intersected with the terms interpretation and bias*. Forty-five paradigms were found, categorized into those using ambiguous words, ambiguous images, and ambiguous scenarios. The key features, strengths and limitations of the paradigms identified are discussed.

Biased interpretation of ambiguous information in patients with chronic pain: A systematic review and meta-analysis of current studies.

OBJECTIVE: The aim of this review is to provide a synthesis of studies exploring biased interpretation of ambiguous information in individuals with chronic pain, and to meta-analyze the results of studies comparing individuals with chronic pain to pain-free controls. METHOD: Studies were identified via a search of Medline, PsycINFO, Web of Science, CINAHL, and Cochrane Library databases. Search terms were bias*, interpretation, and ambiguous, intersected with the term pain. RESULTS: Seven eligible studies (featuring 445 individuals with chronic pain, and 407 pain-free controls including 170 health professionals) using 4 different paradigms (word stem completion task, homographic response task, homophone task, incidental learning task) were identified and included. All 7 studies provided evidence of significantly more frequent pain-related/illness-related interpretations of ambiguous words (which also have possible neutral interpretations) or images (morphed painful and happy facial expressions) in individuals with chronic pain relative to healthy controls. This was confirmed by a significant between-groups difference in a meta-analysis of available data from 4 studies (Hedges' adjusted g effect size = 0.67). CONCLUSIONS: Individuals with chronic pain demonstrate biased interpretation of ambiguous information favoring pain-related/illness-related interpretations. A number of important methodological limitations are apparent however, including potential sources of bias in the classification of participant responses in some paradigms. Further research adopting more rigorous methodology is therefore required. Another area for future research is investigation into how different forms of cognitive bias (i.e., attentional, interpretation, and memory biases) interact with one another in chronic pain patients. (PsycINFO Database Record

Treatment of Female Sexual Pain Disorders: A Systematic Review.

Sexual pain disorders affect women's sexual and reproductive health and are poorly understood. Although many treatments have been evaluated, there is no one "gold standard" treatment. The aim of this systematic review was to investigate what treatments for female sexual pain have been evaluated in clinical studies and their effectiveness. The search strategy resulted in 65 papers included in this review. The articles were divided into the following categories: medical treatments; surgical treatments; physical therapies; psychological therapies; comparative treatment studies; and miscellaneous and combined treatments. Topical and systemic medical treatments have generally been found to lead to improvements in, but not complete relief of, pain, and side effects are quite common. Surgical procedures have demonstrated very high success rates, although there has been variability in complete relief of pain after surgery, which suggests less invasive treatments should be considered first. Physical therapies and psychological therapies have been shown to be promising treatments, supporting a biopsychosocial approach to sexual pain disorders. Although most of the interventions described have been reported as effective, many women still experience pain. A multidisciplinary team with active patient involvement may be needed to optimize treatment outcome.

Anxiety sensitivity is associated with attentional bias for pain-related information in healthy children and adolescents.

This investigation explored the association between anxiety sensitivity and attentional bias for threatening information in children and adolescents (N = 40). Participants completed a pictorial version of the visual-probe task, featuring pain-related, health-threat and general-threat images presented for 500 and 1250 ms. Regression analyses revealed significant associations between anxiety sensitivity and attentional bias towards pain-related images presented for 500 ms and between state anxiety and attentional bias towards general-threat images presented for 1250 ms. These results suggest that in children and adolescents, anxiety sensitivity is associated with attentional bias for negative information of personal relevance.

Exploring attentional bias for real-world, pain-related information in chronic musculoskeletal pain using a novel change detection paradigm.

OBJECTIVES: Attentional biases for pain-related words and images have commonly been reported in individuals with chronic pain. In former studies, however, pain-related stimuli have been presented without context, for example, facial expressions of pain with no accompanying information regarding the location, severity, or cause of pain or injury. The present study investigated attentional biases for pain-related information using complex, real-world scenes in an ecologically valid experimental paradigm. METHODS: Participants with chronic musculoskeletal pain (n=20) and healthy, pain-free controls (n=23) completed a version of the change detection paradigm, the flicker task, which requires participants to detect a single difference between 2 otherwise identical versions of the same scene. These change-scenes were presented in a continuous cycle for approximately 3 minutes, with an unrelated distractor-scene interspersed between. Both pain-related and neutral scenes were used in 4 experimental conditions: change-pain/distractor-pain, change-pain/distractor-neutral, change-neutral/distractor-pain, and change-neutral/distractor-neutral. RESULTS: Individuals with chronic musculoskeletal pain, relative to healthy control participants, took significantly longer to detect changes when the change-scene was pain-related. Within-group analysis showed healthy control participants to take significantly longer to detect changes in neutral change-scenes compared with pain-related change-scenes. DISCUSSION: This study is the first to show individuals with chronic pain possess attentional biases for pain-related information presented as part of complex, real-world scenes. Possible future research includes the use of real-world scenes in visual-search paradigms modifying attentional biases, and exploration into the relations and effects of combined cognitive biases (eg, attention, memory, and interpretation) in chronic pain.

The role of threat expectancy in attentional bias and thermal pain perception in healthy individuals.

The influence of threat expectancy upon attentional biases for pain-related information and pain thresholds was explored in healthy participants. Participants were randomized to receive either threatening (n = 32) or nonthreatening (n = 31) information regarding an upcoming computerized task assessing cold and heat pain thresholds. Participants receiving threatening information were more worried about the pain task and, relative to those receiving nonthreatening information, showed attentional bias toward sensory-pain words. No between-group differences were found in terms of cold and heat pain thresholds. These results show that the type of information participants receive can influence their attentional processes and emotional concerns.

Using eye movements to investigate selective attention in chronic daily headache.

Previous research has demonstrated that chronic pain is associated with biased processing of pain-related information. Most studies have examined this bias by measuring response latencies. The present study extended previous work by recording eye movement behaviour in individuals with chronic headache and in healthy controls while participants viewed a set of images (i.e., facial expressions) from 4 emotion categories (pain, angry, happy, neutral). Biases in initial orienting were assessed from the location of the initial shift in gaze, and biases in the maintenance of attention were assessed from the duration of gaze on the picture that was initially fixated, and the mean number of visits, and mean fixation duration per image category. The eye movement behaviour of the participants in the chronic headache group was characterised by a bias in initial shift of orienting to pain. There was no evidence of individuals with chronic headache visiting more often, or spending significantly more time viewing, pain images compared to other images. Both participant groups showed a significantly greater bias to maintain gaze longer on happy images, relative to pain, angry, and neutral images. Results are consistent with a pain-related bias that operates in the orienting of attention on pain-related stimuli, and suggest that chronic pain participants' attentional biases for pain-related information are evident even when other emotional stimuli are present. Pain-related information-processing biases appear to be a robust feature of chronic pain and may have an important role in the maintenance of the disorder.

Attentional bias modification in people with chronic pain: a proof of concept study.

The purpose of this proof of concept study was to explore the role of attentional bias modification (ABM) in improving clinically relevant outcomes in chronic pain. Eight participants with chronic pain completed eight ABM sessions, which featured a modified version of the visual-probe task implicitly training attention away from pain-related stimuli towards neutral stimuli. Training sessions included a variety of linguistic and pictorial pain-related stimuli, which were presented at two presentation times (500 and 1250 ms). Participants also completed a standard version of the visual-probe task pre- and post-ABM to assess changes in bias. The primary outcome measure was pain intensity, and secondary outcome measures were anxiety, depression severity and pain interference. Statistically and clinically significant change was shown pre- to post-ABM in pain intensity, anxiety, depression and pain interference. Attentional bias scores did not statistically differ across time. These results support the continued exploration of ABM in chronic pain and the modifications we made to the intervention (i.e. the inclusion of pictorial stimuli and a longer presentation time). Future research is needed to explore the optimal form of ABM and whether improvements are maintained over time.