Prevalence, Causes, Severity, Impact, and Management of Chronic Pain in Australian General Practice Patients

A 5-day course of repetitive transcranial magnetic stimulation before pain onset ameliorates future pain and increases sensorimotor peak alpha frequency

ABSTRACT

Repetitive transcranial magnetic stimulation (rTMS) has shown promise as an intervention for pain. An unexplored research question is whether the delivery of rTMS prior to pain onset might protect against a future episode of prolonged pain. The present study aimed to determine whether (1) 5 consecutive days of rTMS delivered prior to experimentally induced prolonged jaw pain has a prophylactic effect on future pain intensity and (2) whether these effects were accompanied by increases in corticomotor excitability (CME) and/or sensorimotor peak alpha frequency (PAF). On each day from day 0 to 4, 40 healthy individuals received a single session of active (n = 21) or sham (n = 19) rTMS over the left primary motor cortex. Peak alpha frequency and CME were assessed on day 0 (before rTMS) and day 4 (after rTMS). Prolonged pain was induced via intramuscular injection of nerve growth factor in the right masseter muscle after the final rTMS session. From days 5 to 25, participants completed twice-daily electronic diaries including pain on chewing and yawning (primary outcomes), as well as pain during other activities (eg, talking), functional limitation in jaw function and muscle soreness (secondary outcomes). Compared to sham, individuals who received active rTMS subsequently experienced lower pain on chewing and yawning. Furthermore, active rTMS led to an increase in PAF. This is the first study to show that rTMS delivered prior to prolonged pain onset can protect against future pain. Our findings suggest that rTMS may hold promise as a prophylactic intervention for pain.

Sarcandra glabra (Thunb.) Nakai relieves pain behavior by inhibiting NaV1.7 channels

ETHNOPHARMACOLOGICAL RELEVANCE

Sarcandra glabra (Thunb.) Nakai has been traditionally utilized to alleviate pain, treat chronic bronchitis, and enhance immune function. Despite its wide-ranging applications in traditional medicine, detailed studies on its analgesic mechanisms remain limited.

AIM OF THE STUDY

The objective was to evaluate the pain-relieving properties of raw extracts from S. glabra and understand the molecular mechanisms responsible for its pain relief benefits.

MATERIALS AND METHODS

By collecting S. glabra plant materials from Yunnan Province and using ethanol extraction methods, the ethanol extract of S. glabra (ZJF) was prepared and evaluated for its anti-nociceptive activity using hot plate-induced and acetic acid-induced pain tests. Simultaneously, using HEK293T cells expressing the voltage-gated sodium channel subtype NaV1.7, patch-clamp recordings were employed to study the inhibitory effects of ZJF on the NaV1.7 channel and to screen for the key bioactive compound isofraxidin. Additionally, studies were conducted on the inhibitory characteristics of isofraxidin against the NaV1.7 channel, and its in vivo anti-nociceptive activity was assessed in a mouse model.

RESULTS

The crude extracts of S. glabra plant effectively mitigated pain sensation, showing robust analgesic activity in mice pain models induced by heat and acetic acid. Electrophysiological screening revealed that isofraxidin is the bioactive compound in S. glabra responsible for its analgesic properties. The current-voltage and conductance-voltage relationships of isofraxidin's inhibition of the NaV1.7 channel suggest that isofraxidin directly binds to the pore region of the NaV1.7 channel.

CONCLUSION

In preclinical evaluations, S. glabra and isofraxidin have demonstrated potential as effective anti-nociceptive agents. Their ability to alleviate pain is likely due to their inhibition of the NaV1.7 channel, which is crucial for pain initiation, transmission, and regulation. These findings shed light on the molecular mechanisms behind the analgesic properties of S. glabra. Additionally, isofraxidin shows great potential in the creation of new pain-relief medications that target the NaV1.7 channel.

Onset of chronic pain triggered by a lifestyle-change-based weight loss and exercise regimen

Exercise and weight loss are commonly recommended to patients with chronic pain; these interventions can relieve extra stress on the joints, reduce the perception of pain and combat comorbidities such as obesity, anxiety and depression. However, exercise can also exacerbate existing pain, presenting challenges for adherence to exercise and weight loss regimens. Here, we summarise the unique case of a patient who presented with chronic pain that developed during a natural weight loss regimen. The patient sought assessment due to diffuse pain that commenced after significant weight loss and was exacerbated with continued adherence to lifestyle modifications. He received a diagnosis of fibromyalgia and is currently being treated with nerve blocks and local anaesthetic injections of trigger points. This case of onset of fibromyalgia and chronic pain following lifestyle changes and weight loss underscores the need for further research aiming to understand the complex relationship between exercise, weight loss and chronic pain.

Investigating the Prevalence and Level of Pain Experienced by Australian Farmers

OBJECTIVES

This study evaluated the prevalence and level of pain in Australian farmers and how these compare to the general working population. We also explored factors related to the interference of pain on farmers' work.

DESIGN

Logistic regressions were used to examine the prevalence of chronic pain and pain interference with normal work among farmers compared to the general working population, and also to examine the factors associated with pain interference in farmers. A multinomial logistic regression model was used to examine the level of bodily pain among farmers compared to the general working population.

SETTING

The nationally representative HILDA (Household, Income, and Labour Dynamics Australia) survey data (wave 21) was used.

PARTICIPANTS

The final sample included 168 (1.6%) farmers and 10 318 (98.4%) people in the general working population.

RESULTS

There was a higher prevalence of chronic pain (p < 0.001), higher levels of bodily pain (p < 0.001), and pain interference with normal work (p < 0.001) in farmers than in the general working population. Age, gender, Body Mass Index (BMI), education level, remoteness, and personal social cohesion were not associated with pain interference with normal work in farmers.

CONCLUSION

The prevalence of chronic pain, level of bodily pain, and pain interference with normal work in Australian farmers is higher than the general working population. However, information is lacking on the factors that influence pain for this unique group. Further exploration is needed into why factors that are commonly associated with pain are not associated with pain in the farming population.

Age and Gender Differences in the Relationship Between Chronic Pain and Dementia Among Older Australians

OBJECTIVES

Chronic pain is a highly debilitating condition that affects older adults and has the potential to increase their odds of experiencing cognitive impairment. The primary objective of this study was to examine the correlation between chronic pain and dementia. Additionally, this research endeavors to ascertain whether the association between chronic pain and dementia differs by age and gender.

METHODS

Cross-sectional data were derived from the Survey of Disability, Ageing, and Carers. A total of 20 671 and 20 081 participants aged 65 years and older in 2015 and 2018, respectively, were included in this study. The pooled association between chronic pain and dementia was assessed using a multivariable logistic regression model. Furthermore, the study also examined the multiplicative interaction effects between chronic pain and age, as well as chronic pain and gender, with dementia.

RESULTS

The pooled analysis demonstrated that chronic pain was associated with a heightened odds of dementia (adjusted odds ratio 1.95; 95% CI 1.85-2.05) among older Australians compared with their counterparts without chronic pain. The interaction effect indicated that individuals with chronic pain across all age groups exhibited increased odds of living with dementia. Additionally, women with chronic pain had higher odds of dementia compared with their counterparts without chronic pain and being male.

CONCLUSIONS

A continuous, coordinated, and tailored healthcare strategy is necessary to determine the pain management goals and explore early treatment options for chronic pain in older adults, particularly in groups with the greatest need.

How Is Chronic Pain Managed in Rural Australia? A Qualitative Study Exploring Rural Healthcare Professional and Consumer Experiences

INTRODUCTION

Guideline-based care for chronic pain is variably provided. Existing data on chronic pain management in Australia come primarily from metropolitan samples. As the initial investigations for a wider needs assessment, we sought to understand how chronic pain is managed in rural Australia, focused on investigating the gap between guideline-recommended care and provided care.

METHODS

We conducted semistructured interviews with rural healthcare professionals who treat patients with chronic pain and rural consumers affected by chronic pain. We asked healthcare professionals what treatments they deliver to patients with chronic pain. We asked consumers to describe the healthcare service providers they had accessed for pain care and the treatments they received from these providers. We utilised content analysis to gain an understanding of what care for chronic pain is being provided and compared these findings to guideline recommendations.

RESULTS

We interviewed 15 healthcare professionals and 27 consumers. Both healthcare professionas and consumers reported minimal use of most first-line management strategies. We also found differences between healthcare professional and consumer reports of pain care. Healthcare professionals frequently described delivering guideline-aligned pain care and consumers frequently described receiving care that contradicted guidelines. We identified challenges with rural access to pain care services, including minimal usage of telehealth services.

CONCLUSIONS

Given the identified gaps in care, future research may consider ways of improving rural access to pain care services, including investigating ways to increase uptake of telehealth services, and how to shift consumer expectations of pain care.

Examining the Effectiveness and Acceptability of Internet-Delivered Psychological Pain Management for Regional and Rural Australians With Chronic Pain

OBJECTIVE

To examine the characteristics, satisfaction levels and clinical outcomes of rural and remote Australians with chronic pain completing an internet-delivered psychological pain management program (PMP).

DESIGN

Longitudinal routine care cohort study.

SETTING

An Australian national digital psychology service.

PARTICIPANTS

Patients in inner regional locations (n = 401), outer regional and remote locations (n = 198), and major cities (n = 968), who used the service over a 6-year period.

MAIN OUTCOME MEASURES

Demographic and clinical data, patient-reported satisfaction and improvements, and meaningful clinical improvements (≥ 30% improvement).

RESULTS

Clinical improvements were observed from pre-treatment to post-treatment in pain-related disability (32% [95% CI: 29, 34]), depression symptoms (44% [95% CI: 39, 49]), anxiety symptoms (43% [95% CI: 39, 47]), and average pain intensity (23% [95% CI: 21, 26]), which were maintained to 3-month follow-up. High levels of satisfaction and treatment completion were also observed. Minor demographic and clinical differences were observed. However, there were similar rates of clinical improvement, treatment satisfaction and treatment completion in all groups.

CONCLUSIONS

The current findings further highlight the value of internet-delivered psychological PMPs for Australians with chronic pain living in regional and remote parts of the country. Further work is needed to raise awareness about the availability of these effective programmes and to integrate their use with traditional pain management services.

Beyond the sum of their parts: The combined association of dementia and chronic pain with self-care limitations in older Australians

BACKGROUND

The purpose of this study was to investigate the association between dementia, chronic pain and self-care limitations. Additionally, the study sought to explore the relationship of co-occurring dementia and chronic pain with self-care limitations.

METHODS

Cross-sectional data derived from the Survey of Disability, Ageing and Carers (SDAC) was used to conduct this study. The pooled association between dementia, and chronic pain, with self-care limitations was assessed using ordered logistic regression model. Furthermore, the study also examined the group comparison of interaction effects between co-occurring dementia and chronic pain with self-care limitations.

RESULTS

The ordered logistic regression analysis indicated that people with dementia had significantly higher odds of experiencing greater self-care limitations (adjusted odds ratio [aOR]: 15.12, 95 % confidence interval [CI]: 12.50-18.29) compared to people without dementia. Similarly, chronic pain was independently associated with increased self-care limitations (aOR: 5.98, 95 % CI: 5.49-6.52) compared to people without chronic pain. Additionally, interaction effect analysis revealed that the co-occurrence of dementia and chronic pain substantially heightened the likelihood of self-care limitations (aOR: 66.54, 95 % CI: 52.27-84.69) relative to people without either condition.

CONCLUSIONS

Disability was higher among older Australians with dementia and chronic pain, and this risk can be increased if the two conditions co-exist. A continuous, aligned, and personalised healthcare approach is needed to establish self-care priorities, especially in groups of people with the greatest need.

Characterizing phenotypes and clinical and health utilization associations of young people with chronic pain: latent class analysis using the electronic Persistent Pain Outcomes Collaboration database

ABSTRACT

Using the Australiasian electronic Persistent Pain Outcomes Collaboration, a binational pain registry collecting standardized clinical data from paediatric ePPOC (PaedsePPOC) and adult pain services (AdultePPOC), we explored and characterized nationally representative chronic pain phenotypes and associations with clinical and sociodemographic factors, health care utilization, and medicine use of young people. Young people ≥15.0 and <25.0 years captured in PaedePPOC and AdultePPOC Australian data registry were included. Data from 68 adult and 12 paediatric pain services for a 5-year period January 2018 to December 2022 (first episode, including treatment information) were analysed. Unsupervised latent class analysis was applied to explore the existence of distinct pain phenotypes, with separate models for both services. A 3-phenotype model was selected from both paediatric and adult ePPOC data, with 693 and 3518 young people included, respectively (at least one valid indicator variable). Indicator variables for paediatric models were as follows: pain severity, functional disability (quasisurrogate "pain interference"), pain count, pain duration, pain-related worry (quasisurrogate "catastrophizing"), and emotional functioning; and, for adult models: pain severity, pain interference, pain catastrophizing, emotional functioning, and pain self-efficacy. From both services, 3 similar phenotypes emerged ("low," "moderate," "high"), characterized by an increasing symptom-severity gradient in multidimensional pain-related variables, showing meaningful differences across clinical and sociodemographic factors, health service utilization, and medicines use. Derived phenotypes point to the need for novel care models that differentially respond to the needs of distinct groups of young people, providing timely, targeted, age-appropriate care. To effectively scale such care, digital technologies can be leveraged to augment phenotype-informed clinical care.

The Relationships Among Chronic Pain Subtypes, Motor Function, and Physical Activity in Community-Dwelling Japanese Older Adults: A Cross-Sectional Study

PURPOSE

We investigated the relationships among motor function, physical activity, and the characteristics of chronic pain (the number of pain sites, pain intensity, and pain-type).

DESIGN

Cross-sectional study.

SETTING

An ongoing community-based prospective study conducted in Itoshima, Japan.

SUBJECTS

Community-dwelling Japanese aged 65-75 years (n = 805; 401 men, 404 women).

MEASURES

Chronic pain subtypes were examined in terms of the number of pain sites, pain intensity, and pain type. Motor function was evaluated by handgrip strength, walking speed, and the 5 Times Stand-up and Sit Test (FTSST). Locomotive activity, non-locomotive activity, and sedentary time were evaluated by a tri-axial accelerometer as physical-activity parameters.

ANALYSIS

Multiple regression model adjusting for age, sex, education level, employment status, subjective economic status, body mass index, cognitive function, comorbidity, current tobacco use, current alcohol consumption, and regular exercise.

RESULTS

In a multivariate analysis, the subjects' walking speed was negatively associated with multisite, moderate-to-severe, and neuropathic-like pain. The FTSST was positively associated with single-site, moderate-to-severe, and neuropathic-like pain. There was no significant association between handgrip strength and any chronic pain subtypes. Locomotive activity was negatively related to multisite, moderate-to-severe, and neuropathic-like pain, but there was no clear association between the amount of non-locomotive activity, sedentary time, and chronic pain subtypes.

CONCLUSION

Severe chronic pain was associated with decreased locomotion-related motor function and physical activity.

Novel perspectives on leptin in osteoarthritis: Focus on aging

Osteoarthritis (OA) is a common chronic joint disease characterized by articular cartilage degeneration, subchondral sclerosis, synovitis, and osteophyte formation. OA is associated with disability and impaired quality of life, particularly among the elderly. Leptin, a 16-kD non-glycosylated protein encoded by the obese gene, is produced on a systemic and local basis in adipose tissue and the infrapatellar fat pad located in the knee. The metabolic mechanisms employed by leptin in OA development have been widely studied, with attention being paid to aging as a corroborative risk factor for OA. Hence, in this review, we have attempted to establish a potential link between leptin and OA, by focusing on aging-associated mechanisms and proposing leptin as a potential diagnostic and therapeutic target in aging-related mechanisms of OA that may provide fruitful guidance and emphasis for future research.

The experience of occupational therapists and physiotherapists using a prototype, evidence-informed online knowledge translation resource to learn about patient-defined, personally-meaningful chronic pain rehabilitation

Purpose

Chronic pain is a complex biopsychosocial experience, and rehabilitation helps people to manage pain, and restore valued life roles. Evidence suggests that more positive outcomes occur when clients perceive their rehabilitation to be meaningful. People with chronic pain describe rehabilitation as personally-meaningful when they develop a genuine connection with a credible therapist who they see as a guiding partner, and when rehabilitation holds personal value, is self-defined, and relevant to their sense of self-identity. This paper presents a qualitative study of therapists' experience using an e-learning package on patient-defined, personally-meaningful rehabilitation.

Methods

A qualitative descriptive design was used to explore rehabilitation therapists' experience of a prototype evidence-informed, online resource developed on the basis of eLearning and web-design principles. Semi-structured interviews and focus groups were conducted with a purposive sample of occupational therapists and physiotherapists, and inductive coding and thematic analysis of transcripts was completed.

Findings

Twenty-four therapists (12 occupational therapists, 12 physiotherapists) participated, representing a mix of gender and experience (early career; experienced; and specialist). Four themes and 12 sub-themes emerged from the analysis. The resource delivered a positive user experience, which added (translational) value to enhance learning, and participants were highly positive about the future potential of the resource to translate chronic pain rehabilitation research for early career, experienced, and specialist rehabilitation therapists.

Conclusion

Results suggest that the disparate learning needs of rehabilitation therapists from diverse professional backgrounds and experience, may be addressed through the one resource. Participant feedback provides evidence that the resource fits with current models of learning and behaviour change. This study demonstrates the importance of basing online resources on eLearning and web-design principles to translate complex biopsychosocial chronic pain rehabilitation research for rehabilitation therapists.

The use of nonpharmacological interventions for chronic pain treatment in community-dwelling older adults with a certified need for care

BACKGROUND

Chronic pain is a major health issue and rapid population ageing exacerbates the burden to health systems in countries like Germany. Nonpharmacological interventions (NPIs) are essential in pain care and the prioritization of active NPIs is emphasized in guidelines. This paper examines the utilization of NPIs for chronic pain management in community-dwelling older adults with a certified need of care in Berlin, Germany.

METHODS

Cross-sectional data was collected through standardized face-to-face surveys with older adults (≥65 years), using validated instruments (e.g., Brief Pain Inventory), and structured lists for NPI utilization. Categorization into active and passive NPIs was performed through a literature-based, iterative process by an interdisciplinary team. For not normally distributed data, non-parametric tests were used as appropriate. Logistic regression was conducted for multivariate analysis.

RESULTS

In total, 250 participants were included in this analysis (aged 65-104, x̅ = 81.8, 68.8% female). Most (92%) use NPIs for chronic pain management: 85.6% use active NPIs, 50.4% active movement and only 5.6% use solely passive approaches. Most common NPIs are distraction, thermotherapy/compresses, and physiotherapy. The odds of utilizing physiotherapy are three times higher for those with high educational status when compared to those with low education while those with low educational status had higher odds of using thermotherapy/compresses.

CONCLUSIONS

In our sample, most community-dwelling older adults with a certified need of care use active NPIs for chronic pain management with about half using active movement approaches. Considering the high vulnerability of this population, physiotherapy (in the form of therapeutic exercise) is a particularly appropriate intervention, and it was the third most frequent NPI in our sample. However, there is a social gradient in the utilization of physiotherapy for chronic pain management which might be rooted in issues around awareness, appeal, and access to such measures. It is important to take socioeconomic differences into account when planning the care for older chronic pain patients but also when designing research or user-friendly guidelines for this target group.

TRIAL REGISTRATION

Ethical approval from the Ethics Committee of Charité - Universitätsmedizin Berlin (EA1/368/14) and study registration with the Central Study Register (ZSR no. 20009093).

Positive Association between Patients' Perception of Chronic Pain Rehabilitation as a Personally Meaningful Experience and the Flourishing Aspect of Well-Being

Chronic pain rehabilitation helps to reduce pain and restore valued life roles. Patients may have more positive outcomes when they perceive rehabilitation to be personally meaningful. This study examined associations between self-reported, personally meaningful rehabilitation and well-being. A pilot study was conducted using an online survey of people with chronic pain and experiences of rehabilitation. The PROMIS Pain Interference Short Form 8a and The Flourishing Scale were used to explore well-being. A modified self-report measure, the Meaningfulness in Rehabilitation Scale, was pilot-tested for construct validity and used in the survey. Of the 48 participants (81% female; 19% male), most attended a generalist therapy practice (62%) once per week (33%) or once per fortnight (29%). No statistically significant relationship was found between self-reported meaningfulness in rehabilitation and pain interference or other patient and therapy characteristics (duration of chronic pain category, type of therapy practice, resolution of rehabilitation category, and frequency of appointments). The nonparametric analysis identified a statistically significant moderate positive correlation between self-reported meaningfulness in rehabilitation and the flourishing aspect of well-being. This raises important questions and suggests that patients' perception of rehabilitation as meaningful warrants further research. This pilot study provides valuable guidance to inform a larger investigation.

Diagnosing and managing prescription opioid use disorder in patients prescribed opioids for chronic pain in Australian general practice settings: a qualitative study using the theory of Planned Behaviour

BACKGROUND

Chronic pain is a debilitating and common health issue. General Practitioners (GPs) often prescribe opioids to treat chronic pain, despite limited evidence of benefit and increasing evidence of harms, including prescription Opioid Use Disorder (pOUD). Australian GPs are worried about the harms of long-term opioids, but few are involved in the treatment of pOUD. There is little research on GPs' experiences diagnosing and managing pOUD in their chronic pain patients.

METHODS

This qualitative research used semi-structured interviews and a case study to investigate GPs' experiences through the lens of the Theory of Planned Behaviour (TPB). TPB describes three factors, an individual's perceived beliefs/attitudes, perceived social norms and perceived behavioural controls. Participants were interviewed via an online video conferencing platform. Interviews were transcribed verbatim and thematically analysed.

RESULTS

Twenty-four GPs took part. Participants were aware of the complex presentations for chronic pain patients and concerned about long-term opioid use. Their approach was holistic, but they had limited understanding of pOUD diagnosis and suggested that pOUD had only one treatment: Opioid Agonist Treatment (OAT). Participants felt uncomfortable prescribing opioids and were fearful of difficult, conflictual conversations with patients about the possibility of pOUD. This led to avoidance and negative attitudes towards diagnosing pOUD. There were few positive social norms, few colleagues diagnosed or managed pOUD. Participants reported that their colleagues only offered positive support as this would allow them to avoid managing pOUD themselves, while patients and other staff were often unsupportive. Negative behavioural controls were common with low levels of knowledge, skill, professional supports, inadequate time and remuneration described by many participants. They felt OAT was not core general practice and required specialist management. This dichotomous approach was reflected in their views that the health system only supported treatment for chronic pain or pOUD, not both conditions.

CONCLUSIONS

Negative beliefs, negative social norms and negative behavioural controls decreased individual behavioural intention for this group of GPs. Diagnosing and managing pOUD in chronic pain patients prescribed opioids was perceived as difficult and unsupported. Interventions to change behaviour must address negative perceptions in order to lead to more positive intentions to engage in the management of pOUD.

Health and illness beliefs regarding pain and pain management of New Zealand resident Sāmoan community leaders: A qualitative interpretive study based on Pasifika paradigms

ISSUE ADDRESSED

Ethnic disparities in chronic pain exist in Aotearoa New Zealand, including a greater impact of pain, less access to chronic pain services and less benefit from treatment for Pasifika people. This study investigated Sāmoan health perceptions and beliefs in relation to pain and how it is managed.

METHODS

An interpretive descriptive study was undertaken involving interviews with nine Sāmoan key informants from Aotearoa New Zealand. Interviews explored their beliefs in relation to interpretations of pain and experiences of and preferences for pain management. Interviews were recorded and transcribed. Data were analysed using thematic analysis.

RESULTS

Four main themes were constructed from the data. Pain is interpreted holistically described the attribution of pain to many causes, without limitation to physiological explanations. Stoicism is a character virtue described the predominant belief that pain should be endured without display or complaint. Strength in connectivity described the inherent pain coping strategies that are present within Sāmoan communities. To improve healthcare is to nurture vā described the disconnect Sāmoan people feel from healthcare services and the need to foster relationships to improve health delivery.

CONCLUSIONS

Sāmoan people have beliefs and perceptions about pain and its management that extend beyond traditional Western interpretations. While pain is often endured using traditional strengths within the 'āīga (family) and community, the Sāmoan community faces challenges in receiving healthcare from mainstream pain services. SO WHAT?: Clinicians need to foster stronger relationships with Sāmoan individuals and their 'āīga and appreciate the wider psychosocial context of pain, including spirituality.

A 5-day course of rTMS before pain onset ameliorates future pain and increases sensorimotor peak alpha frequency

Repetitive transcranial magnetic stimulation (rTMS) has shown promise as an intervention for pain. An unexplored research question is whether the delivery of rTMS prior to pain onset might protect against a future episode of prolonged pain. The present study aimed to determine i) whether 5 consecutive days of rTMS delivered prior to experimentally-induced prolonged jaw pain could reduce future pain intensity and ii) whether any effects of rTMS on pain were mediated by changes in corticomotor excitability (CME) and/or sensorimotor peak alpha frequency (PAF). On each day from Day 0-4, forty healthy individuals received a single session of active (n = 21) or sham (n = 19) rTMS over the left primary motor cortex. PAF and CME were assessed on Day 0 (before rTMS) and Day 4 (after rTMS). Prolonged pain was induced via intramuscular injection of nerve growth factor (NGF) in the right masseter muscle after the final rTMS session. From Days 5-25, participants completed twice-daily electronic dairies including pain on chewing and yawning (primary outcomes), as well as pain during other activities (e.g. talking), functional limitation in jaw function and muscle soreness (secondary outcomes). Compared to sham, individuals who received active rTMS subsequently experienced lower pain on chewing and yawning. Although active rTMS increased PAF, the effects of rTMS on pain were not mediated by changes in PAF or CME. This study is the first to show that rTMS delivered prior to pain onset can protect against future pain and associated functional impairment. Thus, rTMS may hold promise as a prophylactic intervention for persistent pain.

Waiting in Pain II: An Updated Analysis of the Multidisciplinary Staffing Levels and Clinical Activity in Australian Specialist Persistent Pain Services

This study provides an update on multidisciplinary staffing and clinical activity in Australian specialist persistent pain services. Of the 109 services identified, 57 responded, met inclusion criteria and completed a study-specific questionnaire detailing service characteristics, staff resources, and clinical activities. Where possible, data were compared between the 'Waiting in Pain' (WIP) investigations (WIP-I: Dec'08-Jan'10, WIP-II: Jul'16-Feb'18). WIP-II found more pain services (Level 1 centres, rural services) and more full-time equivalent (FTE) staffing (overall, psychiatry, psychology, occupational therapy) than WIP-I. Although Level 1 centres employed more FTE staff (overall, medical) than Level 2 clinics, staffing was comparable when considered relative to clinical activity and this was stable over time for most disciplines. Clinical activity in metropolitan and rural services also remained stable, as did rural service staffing (type, FTE), suggesting that newer clinics replicated existing models. WIP-II highlighted greater diversity in group structures than WIP-I and an associated mean .02FTE allied health staff/patient seen (WIP-I = .03 FTE). Staffing (amounts, types) did not change significantly over time when considered relative to clinical activity, supporting the conclusion that these are workable clinical structures. However, changes in group format (duration, staffing) suggest a shift towards lower-intensity programmes that require less allied health staffing to deliver. PERSPECTIVE: This article presents updated data regarding multidisciplinary staffing profiles, clinical activity, and group programme structures within Australian specialist persistent pain services and examines changes since the original investigation. As the only published staffing profile for multidisciplinary pain services, this project provides critical information to inform service (re)design and care delivery.

The predicting factors of chronic pain among nursing students: a national study in Iran

BACKGROUND

Nursing students are faced with a variety of challenges that demand effective cognitive and emotional resources. The physical and psychological well-being of the students plays a key part in the public health of the community. Despite the special lifestyle of nursing students, few studies have addressed chronic pain in this population. Accordingly, the present study aims to identify the predictors of chronic pain among nursing students.

METHODS

This cross-sectional study was conducted on 1,719 nursing students aged 18-42 years, between February and November 2019. Sampling was carried out in several stages. Data were collected using seven instruments, namely a demographics survey, the characteristics of chronic pain form, Spielberger State-Trait Anxiety Inventory (STAI), the Patient Health Questionnaire-9 (PHQ-9), the Bar-on Emotional Quotient Inventory, Academic Satisfaction Scale, and Procidano and Heller Social Support Scale. Descriptive statistics, multinomial logistic regression, and regression models were used to describe the characteristics of the pain and its predictive factors.

RESULTS

The average age of the participants was 22.4 ± 2.96 years. The results of univariate analysis showed that gender (P = 0.506), mother's education (P = 0.056, P = 0.278, P = 0.278), father's education (P = 0.817, P = 0.597, P = 0.41), place of residence (P = 0.215), depression (P = 0.501), grade point average (P = 0.488), academic satisfaction (P = 0.183) and chronic pain weren't significantly correlated with chronic pain in nursing students. The results of the multiple logistic regression models showed that chronic pain was positively correlated with age, social support, state anxiety, and trait anxiety (OR = 1.07, 95% CI: 1.02-1.12; OR = 0.95, 95% CI: 0.93-0.97; OR = 1.03, 95% CI: 1.02-1.05; and OR = 1.97, 95% CI: 0.95-1.99; respectively).

CONCLUSION

The prevalence of chronic pain was relatively high in these students. In addition, age, social support, and anxiety could be important factors in the development or persistence of chronic pain in nursing students. The results also provided basic and essential information about the contributing factors in this area. However, consideration of factors such as referral for treatment, home medications for pain relief, and outcomes of chronic pain are suggested in future longitudinal studies.

A comparative analysis of the prevalence and predictors of chronic pain in older adults with and without intellectual disability in Australia

BACKGROUND

There is little research comparatively assessing prevalence of pain between older people either with or without intellectual disability. This paper explores health and social factors associated with chronic pain in these two groups.

METHOD

A cross-sectional survey was undertaken in New South Wales and Queensland, Australia. Inclusion criteria were adults either with or without intellectual disability, aged 60 years and older, and currently living in community-settings. Univariate and multivariable analyses were undertaken on a sample of 391 adults with intellectual disability and 920 adults without intellectual disability.

RESULTS

Key findings included higher prevalence of pain in the intellectual disability group, along with higher rates of osteoarthritis, falls, oral health problems, and mood disorders.

CONCLUSIONS

Mitigating risk factors for conditions that cause chronic pain in older adults is crucial. As longevity increases, the healthcare sector needs to prioritise chronic pain management for people with intellectual disabilities through appropriate treatment strategies.

Osteoarthritis year in review 2023: Epidemiology & therapy

OBJECTIVE

To highlight some important findings from osteoarthritis (OA) epidemiology and therapy research undertaken over the past year.

METHODS

Search of MEDLINE and EMBASE databases between April 1, 2022 to March 3, 2023 using "exp *Osteoarthritis/" as the preliminary search term. The search was limited to articles published in English and including human subjects. Final inclusions were based on perceived importance and results that may inform improved identification of risk factors or OA treatments, as well as OA subgroups of potential relevance to risk factors or treatment approaches.

RESULTS

3182 studies were screened, leaving 208 eligible for inclusion. This narrative review of thirty-three selected studies was arranged into: a) OA predictors - population-based studies, b) Specific predictors of OA and OA outcome; c) Intra-articular injections, and d) OA phenotypes. There was some suggestion of sex differences in predictors of incidence or outcomes. Body mass index changes appear largely to affect knee OA outcomes. Evidence points to a lack of benefit of viscosupplementation in knee OA; findings were variable for other injectables. Studies of OA phenotypes reveal potentially relevant clinical and pathophysiological differences.

CONCLUSIONS

Identifying risk factors for the incidence/progression of OA represents an ongoing and important area of OA research. Sex may play a role in this understanding and bears consideration and further study. For knee injectables other than viscosupplementation, additional high-quality trials appear warranted. Continued investigation and application of phenotyping across the OA disease, illness and care spectrum may be key to developing disease-modifying agents and their appropriate selection for individuals.

Implementation of the "clinical framework for the delivery of health services" by treating healthcare professionals: perspectives of regulators and insurers

PURPOSE

To understand the current utilisation of the clinical framework for delivery of health services to manage compensable musculoskeletal injuries from the perspectives of insurer case managers and clinical panel members.

MATERIALS AND METHODS

Using a qualitative descriptive approach, 15 semi-structured interviews were conducted with members of key organisations including WorkSafe Victoria and Transport Accident Commission Victoria. All interviews were recorded and transcribed verbatim and analysed using thematic analysis.

RESULTS

Four over-arching themes were identified: (i) current use of the framework and principles is suboptimal leading to several problems including lack of evidence-based treatment by clinicians; (ii) barriers to optimal use of the framework include lack of adequate training of healthcare professionals on the framework principles and financial aspects of the compensation system; (iii) utilisation of the framework could be improved with training from peak associations, insurers, and regulating bodies; and (iv) optimal use of the framework will result in better health and work outcomes.

CONCLUSIONS

The current use of the framework and its principles is suboptimal but can be improved by addressing the identified barriers.IMPLICATIONS FOR REHABILITATIONRehabilitation of compensable musculoskeletal injuries is often complex.Implementing the "Clinical Framework for Delivery of Health Services" can lead to provision of time and cost effective, evidence-based rehabilitation for compensable injuries, ultimately improving patient outcomes.Clinicians can enhance the implementation of the framework principles by integrating evidence-based practice and recommendations from clinical practice guidelines in treatment of compensable musculoskeletal injuries.Implementation of the framework principles may be enhanced by reviewing the compensation funding model to allow the healthcare practitioners adequate time and remuneration to adopt the framework principles when treating persons with compensable injuries.

Effects of Different Mind-body Exercises in Managing Chronic Pain of Older Adults: A Network Meta-analysis of Randomized Trials

INTRODUCTION

Mind-body exercises (MBEs) were shown to be effective in managing chronic pain among older adults in several recent studies. However, the differences in the effects of different MBEs remained unclear.

OBJECTIVE

To compare the effects of different MBEs in managing chronic pain in older adults.

METHODS

Eight databases were searched for studies published between 2012 and 2023, and 14 studies were included in this systematic review and network meta-analysis (NMA). The NMA was performed using R and Metainsight.

RESULTS

Results showed that tai chi and yoga were effective in alleviating chronic pain, but their effects were not superior to traditional physical exercises and other MBEs. In addition, none of the MBEs were shown to be effective in mitigating chronic pain-related disabilities.

CONCLUSION

Tai chi and yoga can be used for relieving chronic pain in older adults; however, MBE programs alone were not sufficient to mitigate chronic pain-related disabilities.

Reducing opioid use for chronic non-cancer pain in primary care using an evidence-based, theory-informed, multistrategic, multistakeholder approach: a single-arm time series with segmented regression

BACKGROUND

Many countries have high opioid use among people with chronic non-cancer pain. Knowledge about effective interventions that could be implemented at scale is limited. We designed a national intervention that included audit and feedback, deprescribing guidance, information on catastrophising assessment, pain neuroscience education and a cognitive tool for use by patients with their healthcare providers.

METHOD

We used a single-arm time series with segmented regression to assess rates of people using opioids before (January 2015 to September 2017), at the time of (October 2017) and after the intervention (November 2017 to August 2019). We used a cohort with historical comparison group and log binomial regression to examine the rate of psychologist claims in opioid users not using psychologist services prior to the intervention.

RESULTS

13 968 patients using opioids, 8568 general practitioners, 8370 pharmacies and accredited pharmacists and 689 psychologists were targeted. The estimated difference in opioid use was -0.51 persons per 1000 persons per month (95% CI -0.69, -0.34; p<0.001) as a result of the intervention, equating to 25 387 (95% CI 24 676, 26 131) patient-months of opioid use avoided during the 22-month follow-up. The targeted group had a significantly higher rate of incident patient psychologist claims compared with the historical comparison group (rate ratio: 1.37, 95% CI 1.16, 1.63; p<0.001), equating to an additional 690 (95% CI 289, 1167) patient-months of psychologist treatment during the 22-month follow-up.

CONCLUSIONS

Our intervention addressed the cognitive, affective and sensory factors that contribute to pain and consequent opioid use, demonstrating it could be implemented at scale and was associated with a reduction in opioid use and increasing utilisation of psychologist services.

Importance of different electronic medical record components for chronic disease identification in a Swiss primary care database: a cross-sectional study

BACKGROUND

Primary care databases collect electronic medical records with routine data from primary care patients. The identification of chronic diseases in primary care databases often integrates information from various electronic medical record components (EMR-Cs) used by primary care providers. This study aimed to estimate the prevalence of selected chronic conditions using a large Swiss primary care database and to examine the importance of different EMR-Cs for case identification.

METHODS

Cross-sectional study with 120,608 patients of 128 general practitioners in the Swiss FIRE ("Family Medicine Research using Electronic Medical Records") primary care database in 2019. Sufficient criteria on three individual EMR-Cs, namely medication, clinical or laboratory parameters and reasons for encounters, were combined by logical disjunction into definitions of 49 chronic conditions; then prevalence estimates and measures of importance of the individual EMR-Cs for case identification were calculated.

RESULTS

A total of 185,535 cases (i.e. patients with a specific chronic condition) were identified. Prevalence estimates were 27.5% (95% CI: 27.3-27.8%) for hypertension, 13.5% (13.3-13.7%) for dyslipidaemia and 6.6% (6.4-6.7%) for diabetes mellitus. Of all cases, 87.1% (87.0-87.3%) were identified via medication, 22.1% (21.9-22.3%) via clinical or laboratory parameters and 19.3% (19.1-19.5%) via reasons for encounters. The majority (65.4%) of cases were identifiable solely through medication. Of the two other EMR-Cs, clinical or laboratory parameters was most important for identifying cases of chronic kidney disease, anorexia/bulimia nervosa and obesity whereas reasons for encounters was crucial for identifying many low-prevalence diseases as well as cancer, heart disease and osteoarthritis.

CONCLUSIONS

The EMR-C medication was most important for chronic disease identification overall, but identification varied strongly by disease. The analysis of the importance of different EMR-Cs for estimating prevalence revealed strengths and weaknesses of the disease definitions used within the FIRE primary care database. Although prioritising specificity over sensitivity in the EMR-C criteria may have led to underestimation of most prevalences, their sex- and age-specific patterns were consistent with published figures for Swiss general practice.

Content and Quality of Mobile Apps for the Monitoring of Musculoskeletal or Neuropathic Pain in Australia: Systematic Evaluation

Background

Mobile apps offer a potential mechanism for people with persistent pain to monitor pain levels conveniently within their own environment and for clinicians to remotely monitor their patients' pain. However, the quality of currently available apps and the usefulness of included features from a clinical perspective are not known.

Objective

The aim of this study was to examine the content and quality of currently available smartphone apps designed for monitoring the intensity or presence of musculoskeletal or neuropathic pain.

Methods

A systematic search was performed in the Australian Apple and Google Play stores. Apps were included if they were designed to monitor the intensity or presence of musculoskeletal or neuropathic pain and were available in the English language within the Australian app stores. Data pertaining to the intended use of the app and clinical population were extracted by using a custom-designed data extraction form, and app quality was assessed by using the 23-item Mobile App Rating Scale.

Results

Of the 2190 apps screened, 49 met the inclusion criteria. Apps were primarily designed for adult users (36/49, 73%) with nonspecific musculoskeletal or neuropathic pain conditions, arthritis, and joint pain. All apps monitored pain intensity, with almost half (23/49, 47%) also specifying pain location. Overall, the mean quality scores from the Mobile App Rating Scale ranged from 1.5 to 4.4 (out of 5.0). Between 20% (10/49) and 22% (11/49) of apps involved clinicians, consumers, or both in their development, and 20% (10/49) had published literature related to the development or use of the app in clinical scenarios. Although 71% (35/49) had data sharing features, only 5 apps enabled client-clinician communication through the app.

Conclusions

The overall quality of mobile apps that are currently available for monitoring pain intensity is acceptable. Presently, mobile apps for remote pain monitoring lack functionality for clinicians to view data between consults. Both users and clinicians should be aware of the limitations of these apps and make informed choices in using or recommending apps that best suit the clinical need.

Prevalence of diagnosable depression in patients awaiting orthopaedic specialist consultation: a cross-sectional analysis

BACKGROUND

Musculoskeletal conditions, including osteoarthritis (OA), are a leading cause of disability and chronic pain, and are associated with high rates of comorbid depression. However, signs of depression are often masked by pain. The aim of this study was to determine the prevalence and severity of depression and pain in individuals awaiting specialist orthopaedic consultation. A secondary objective was to determine the relationship between pain and depression, irrespective of demographic factors and clinical diagnosis.

METHODS

Cross-sectional analysis of individuals awaiting orthopaedic consultation at a public hospital in Melbourne, Australia. Relevant data were extracted from medical records and questionnaires. Descriptive statistics were used to summarise participant characteristics. The patient health questionnaire (PHQ-9) was used to assess depression and a numerical rating scale (NRS) was used to assess pain severity. Multiple linear regression analyses were used to establish the relationship between pain and depression.

RESULTS

Nine hundred and eighty-six adults (mean ± standard deviation, age = 54.1 ± 15.7 years, 53.2% women) participated in the study. OA was present in 56% of the population and 34% of the entire population had moderate depression or greater, 19% of which met the criteria for major depressive disorder. Moderate-to-severe pain was present in 79% of individuals with OA and 55% of individuals with other musculoskeletal complaints. Pain was significantly associated with depression scores (β = 0.84, adjusted R2 = 0.13, P < 0.001), and this relationship remained significant after accounting for gender, age, education and employment status, OA status, number of joints affected and waiting time (β = 0.91, adjusted R2 = 0.19, P < 0.001).

CONCLUSIONS

Depression affects one-third of individuals on an orthopaedic waitlist. A strong link between pain and depression in patients awaiting specialist orthopaedic consultation exists, indicating a need for an integrated approach in addressing pain management and depression to manage this complex and comorbid presentation.

Chronic pain experience through COVID-19: a comparison of reports prior and during the early stages of the pandemic

ABSTRACT

The impacts of COVID-19 and imposed restrictions on individuals with chronic noncancer pain continue to emerge, varying across countries. More recent research (including with longitudinal designs) suggests that the pandemic may not have such a disproportionate effect on chronic noncancer pain and its management as first thought. This longitudinal study, with assessments before the pandemic (2019) and early during the pandemic (May-July 2020), examined changes in validated measures of pain severity, pain interference, prescription opioid misuse, and mental health symptoms. Patients (N = 236) self-reported significant improvements in pain severity, pain interference, pain self-efficacy, pain catastrophizing, prescription opioid misuse, depression, and anxiety symptoms over time. Approximately 30% and 33% of patients achieved minimally important reductions (10% change) in pain severity and pain interference, respectively. In follow-up exploratory analyses, prepandemic sociodemographic and psychological factors predictive of 10% improved (vs 10% worse) pain severity and interference were investigated in logistic regressions. Reduction in pain interference was predicted by current employment, older age, and higher pain self-efficacy. There were no significant predictors of reduction in pain severity. The impact of COVID-19 on patients' pain experience and mental health was negligible in the early stages of the pandemic, and findings suggest improvements through the period. Targeted interventions that promote the protective factor of pain self-efficacy and build resilience may buffer patients' future response to the pandemic because it evolves as a part of our new normal. Targeted social determinants of health interventions that direct resources toward maintaining employment could also be important.

The Role of Adaptive Goal Processes in Mental Wellbeing in Chronic Pain

Chronic pain, experienced as pain persisting for three months or longer, is associated with risk of poor mental health and disability. Research has implicated adaptive goal processes as important to mental wellbeing in a range of populations. However, research has rarely assessed these mechanisms in relation to pain characteristics and mental wellbeing in chronic pain populations. This study aimed to examine the potentially mediating roles of goal flexibility and goal tenacity in the relationships between pain intensity and pain interference and mental wellbeing among individuals with chronic pain. Community members who self-identified as experiencing non-cancer chronic pain (N = 315) completed an online self-report survey on goal tenacity, goal flexibility, mental wellbeing, pain intensity, and pain interference. Unexpectedly, pain intensity was not significantly related to mental wellbeing, when controlling for pain interference. However, pain interference was directly and significantly associated with mental wellbeing. Both goal flexibility and goal tenacity mediated the relationship between pain interference and mental wellbeing, whilst controlling for pain intensity. The results provide support for the protective role of adaptive goal processes in mental wellbeing in those with chronic pain and highlight the importance of pain interference in relation to mental wellbeing.

Communication and access to healthcare: Experiences of Aboriginal and Torres Strait Islander people managing pain in Queensland, Australia

Background

Pain management requires a multidisciplinary approach and a collaborative relationship between patient-provider in which communication is crucial. This study examines the communication experiences of Aboriginal and Torres Strait Islander patients and Aboriginal and Torres Strait Islander Hospital Liaison Officers (ATSIHLOs), to improve understanding of how pain is managed in and through patient-health professional communication.

Methods

This qualitative study involved a purposive sample of patients attending three persistent pain clinics and ATSIHLOs working in two hospitals in Queensland, Australia. Focus groups and in-depth interviews explored the communication experiences of patients managing pain and ATSIHLOs supporting patients with pain. This study adopted a descriptive phenomenological methodology, as described by Colaizzi (1978). Relevant statements (patient and ATSIHLOs quotes) about the phenomenon were extracted from the transcripts to formulate meanings. The formulated meanings were subsequently sorted into thematic clusters and then integrated into themes. The themes were then incorporated into a concise description of the phenomenon of communication within pain management. Findings were validated by participants.

Results

A total of 21 Aboriginal and Torres Strait Islander participants were involved in this study. Exploration of the communication experiences of patients and ATSIHLOs revealed overlapping themes of important barriers to and enablers of communication that affected access to care while managing pain. Acknowledging historical and cultural factors were particularly important to build trust between patients and health professionals. Some patients reported feeling stigmatized for identifying as Aboriginal and Torres Strait Islander, while others were reluctant to disclose their background for fear of not having the same opportunity for treatment. Differences in the expression of pain and the difficulty to use standard pain measurement scales were identified. Communication was described as more than the content delivered, it is visual and emotional expressed through body language, voice intonation, language and the speed of the conversation.

Conclusion

Communication can significantly affect access to pain management services. Aboriginal and Torres Strait Islander patients highlighted the burden of emotional pain caused by historical factors, negative stereotypes and the fear of discrimination. Pain management services and their health professionals need to acknowledge how these factors impact patients trust and care.

How distracting is chronic pain? The impact of chronic pain on driving behaviour and hazard perception

In road safety research, few studies have examined driving behaviour in chronic pain cohorts. The aim of this study was to investigate driving behaviour among drivers experiencing chronic pain. We compared individuals with chronic pain with age-gender matched healthy controls. Participants completed: (i) an anonymous online survey that included participant demographics, transport characteristics, self-reported driving behaviour, and pain characteristics (ii) a response-time hazard perception test and a verbal-response hazard prediction test for drivers, and (iii) a driving diary in which participants recorded their driving over two weeks. The results showed that participants with chronic pain were not significantly worse than controls for hazard perception and prediction test scores, self-reported attention-related errors, driving errors, driving violations, and involuntary distraction. Drivers with chronic pain did report significantly more driving lapses but this effect became non-significant when variables confounded with chronic pain, such as fatigue, were adjusted for. We also found that participants who reported particularly high levels of chronic pain performed worse in the hazard prediction test compared to the control group (and this effect could not be accounted for by other variables associated with chronic pain). In addition, participants with chronic pain reported significantly higher driving workload (mental demand, physical demand, effort, and frustration) compared with controls. The findings of this study provide new insights into driving behaviour in individuals with chronic pain and recommendations for future research in terms of driving assessment and self-regulation strategies are provided.

Opioid prescribing in general practice: an Australian cross-sectional survey

BACKGROUND

Prescribed opioid doses > 100 mg oral morphine equivalent (OME) and/or co-prescribing of sedating psychoactive medications increase the risk of unintentional fatal overdose. We describe general practice encounters where opioids are prescribed and examine high-risk opioid prescribing.

METHODS

The 2006-2016 BEACH study data, a rolling national cross-sectional survey of randomly selected GPs, was analysed.

RESULTS

Opioid prescribing increased 2006-2007 to 2015-2016, however, this plateaued across the latter half-decade. From 2012-2016 3,897 GPs recorded 389,700 encounters and at least one opioid was prescribed at 5.2%. Opioid encounters more likely involved males, those 45-64 years, concession card holders and the socioeconomically disadvantaged. GPs more likely to prescribe opioids were 55 years or older, male, Australian graduates, and in regional and remote areas. The most common problems managed with opioids involved chronic non-cancer pain. One-in-ten opioid prescribing episodes involved high-risk doses and 11% involved co-prescription of sedating psychoactive medications. Over one-third of GPs provided other (non-pharmacological) interventions at encounters with opioid prescriptions.

CONCLUSIONS

Only 5% of GP encounters involved an opioid prescription. Of concern, were: prescribing for chronic non-cancer pain, potentially high-risk opioid encounters where > 100 OME daily dose was prescribed, and/or there was co-prescription of sedating psychoactive medication. However, approximately one-in-three opioid prescribing encounters involved non-pharmacological interventions.

Altered Intrinsic Properties and Inhibitory Connectivity in Aged Parvalbumin-Expressing Dorsal Horn Neurons

The incidence of pain symptoms such as allodynia are known to increase with age. Parvalbumin expressing interneurons (PVINs) within the dorsal horn (DH) of the spinal cord play an important role in allodynia whereby their inhibitory connections prevent innocuous touch information from exciting nociceptive pathways. Here we ask whether the functional properties of PVINs are altered by aging, comparing their functional properties in adult (3–7 month) and aged mice (23–28 month). Patch clamp recordings were made from PVINs in laminae IIi-III of parasagittal spinal cord slices. The intrinsic excitability of PVINs changed with age. Specifically, AP discharge shifted from initial bursting to tonic firing, and firing duration during current injection increased. The nature of excitatory synaptic input to PVINs also changed with age with larger but less frequent spontaneous excitatory currents occurring in aged mice, however, the net effect of these differences produced a similar level of overall excitatory drive. Inhibitory drive was also remarkably similar in adult and aged PVINs. Photostimulation of ChR2 expressing PVINs was used to study inhibitory connections between PVINs and unidentified DH neurons and other PVINs. Based on latency and jitter, monosynaptic PVIN to unidentified-cell and PVIN-PVIN connections were compared in adult and aged mice, showing that PVIN to unidentified-cell connection strength increased with age. Fitting single or double exponentials to the decay phase of IPSCs showed there was also a shift from mixed (glycinergic and GABAergic) to GABAergic inhibitory transmission in aged animals. Overall, our data suggest the properties of PVIN neurons in aged animals enhance their output in spinal circuits in a manner that would blunt allodynia and help maintain normal sensory experience during aging.

Activation of the alpha 7 nicotinic acetylcholine receptor mitigates osteoarthritis progression by inhibiting NF-κB/NLRP3 inflammasome activation and enhancing autophagy

Osteoarthritis (OA) is a chronic degenerative joint disease characterized by cartilage degradation. Alpha 7 nicotinic acetylcholine receptor (α7nAChR) is associated with inflammatory and metabolic responses in OA. However, the mechanisms underlying the pathological process of OA remain unclear. The aim of the present study was to examine the role and mechanisms of α7nAChR-mediated autophagy and anti-inflammatory response in chondroprotection. Monosodium iodoacetate (MIA)-induced Wistar rat OA model was used to assess the in vivo effects of the ɑ7nAChR agonist (PNU-282987). The histopathological characteristics of OA were evaluated by immunohistochemistry (IHC), and the levels of autophagy markers were determined by western blotting and transmission electron microscopy. The anti-inflammatory effect of the ɑ7nAChR agonist was assessed by IHC, quantitative real-time polymerase chain reaction, and western blotting. Parallel experiments to determine the molecular mechanisms through which the ɑ7nAChR agonist prevents OA were performed using interleukin-1β (IL-1β)-treated chondrocytes. Our results showed that PNU-282987 reduced cartilage degeneration and matrix metalloproteinase (MMP)-1 and MMP-13 expressions. Activating α7nAChR with PNU-282987 significantly promoted MIA/IL-1β-induced chondrocyte autophagy, as demonstrated by the increase in LC3-II/LC3-I ratio, Beclin-1 levels, and autophagosome number. Furthermore, treating chondrocyte with ULK1 siRNA attenuated the PNU282987-induced enhancement of LC3-II/LC3-I ratio and Beclin-1 level. Additionally, PNU282987 suppressed NF-κB/NLRP3 inflammasome activation by inhibiting the ROS/TXNIP pathway and suppressed tumor necrosis factor-ɑ and IL-1β secretion in MIA/IL-1β-treated chondrocytes. Our results demonstrate that the activation of α7nAChR promotes chondrocyte autophagy and attenuates inflammation to mitigate OA progression, providing a novel target for the treatment of OA.

Prevalence and sites of pain in remote-living older Aboriginal Australians, and associations with depressive symptoms and disability

BACKGROUND

Pain is a growing public health problem associated with significant health and functional implications. Limited data exist for Aboriginal Australians.

AIMS

To describe the prevalence, severity and sites of pain, analgesic use and associated factors, including depression and disability, in remote-living Aboriginal Australians.

METHODS

Cross-sectional study of 263 Aboriginal Australians aged ≥45 years from six remote Indigenous communities and the town of Derby in the Kimberley region of Western Australia between 2011 and 2013. Pain was assessed using a culturally adapted pain scale. Factors associated with pain were investigated with binary logistic regression.

RESULTS

One hundred and seventy (64.6%) participants reported having pain and 53 (20.2%) reported persistent pain. Of those reporting pain, 61 (35.9%) rated it as moderate and 70 (41.2%) as severe. The most common sites of pain were back and knee, and 38 (22.4%) participants with pain indicated three or more sites of pain. Only 70 (41.2%) participants with pain were on some type of analgesic medication. After adjustment, poor vision (odds ratio (OR) = 2.21; 95% confidence interval (CI) 1.22-4.00), hypertension (OR = 1.89; 95% CI 1.03-3.45) and heart problems (OR = 2.05; 95% CI 1.01-4.14) were associated with pain. Higher depression scores were associated with more persistent pain, but pain was not significantly associated with clinically relevant depressive symptoms, or requiring assistance with two or more personal and/or instrumental activities of daily living.

CONCLUSION

High levels of pain were reported, although the prevalence of persistent pain was comparable to the general population. Identifying risk factors, improving pain recognition and assessment and evaluating culturally tailored management approaches should be a priority.

The mixed kappa and delta opioid receptor agonist, MP1104, attenuates chemotherapy-induced neuropathic pain

Effective treatments for chronic pain without abuse liability are urgently needed. One in 5 adults suffer chronic pain and half of these patients report inefficient treatment. Mu opioid receptor agonists (MOP), including oxycodone, tramadol and morphine, are often prescribed to treat chronic pain, however, use of drugs targeting MOP can lead to drug dependency, tolerance and overdose deaths. Kappa opioid receptor (KOP) agonists have antinociceptive effects without abuse potential; however, they have not been utilised clinically due to dysphoria and sedation. We hypothesise that mixed opioid receptor agonists targeting the KOP and delta opioid receptor (DOP) would have a wider therapeutic index, with the rewarding effects of DOP negating the negative effects of KOP. MP1104, an analogue of 3-Iodobenzoyl naltrexamine, is a novel mixed opioid receptor agonist with potent antinociceptive effects mediated via KOP and DOP in mice without rewarding or aversive effects. In this study, we show MP1104 has potent, long-acting antinociceptive effects in the warm-water tail-withdrawal assay in male and female mice and rats; and is longer acting than morphine. In the paclitaxel-induced neuropathic pain model in mice, MP1104 reduced both mechanical and cold allodynia and unlike morphine, did not produce tolerance when administered daily for 23 days. Moreover, MP1104 did not induce sedative effects in the open-field locomotor activity test, respiratory depression in mice using whole-body plethysmography, or have cross-tolerance with morphine. This data supports the therapeutic development of mixed opioid receptor agonists, particularly mixed KOP/DOP agonists, as non-addictive pain medications with reduced tolerance.

Conceptualization and Management of Chronic Pain in an Over 65 Using an ACT Lens—A Single Case Study

This single case study illustrates the application and utility of Acceptance and Commitment Therapy (ACT) for a 72-year-old Australian male presenting with chronic pain and complex health conditions. Chronic pain often entails complexity among older adults and can impact the patient’s life across a range of domains. Psychological approaches, as stand-alone or adjunct to medical intervention, are widely acknowledged as potentially beneficial to older persons experiencing pain. ACT has been supported as a viable psychological approach for chronic pain and especially suitable for older persons with chronic pain. This study describes an ACT treatment approach for an older person with chronic pain informed via development of an extension of the existing ACT conceptualization of chronic pain. The development of the ACT based model is in keeping with recommendations to seek out mechanisms of change in psychotherapeutic research. Measures of Quality of Life, Depression, Physical Activity, and Acceptance/Avoidance were taken at pre and post treatment, as well as across treatment phases. Improvement was noted in self-reported measures of QOL, depression, and physical activity.

A comparison of Australian chronic disease prevalence estimates using administrative pharmaceutical dispensing data with international and community survey data

Introduction

Chronic disease (CD) is a leading cause of population mortality, illness and disability. Identification of CD using administrative data is increasingly used and may have utility in monitoring population health. Pharmaceutical administrative data using World Health Organization, Anatomic Therapeutic Chemical Codification (ATC) assigned to prescribed medicines may offer an improved method to define persons with certain CD and enable the calculation of population prevalence.

Objective

To assess the feasibility of Australian Pharmaceutical Benefits Scheme (PBS) dispensing data, to provide realistic measures of chronic disease prevalence using ATC codification, and compare values with international data using similar ATC methods and Australian community surveys.

Methods

Twenty-two chronic diseases were identified using World Health Organization (WHO) formulated ATC codes assigned to treatments received and recorded in a PBS database. Distinct treatment episodes prescribed to individuals were counted annually for prevalence estimates. Comparisons were then made with estimates from international studies using pharmaceutical data and published Australian community surveys.

Results

PBS prevalence estimates for a range of chronic diseases listed in European studies and Australian community surveys demonstrated good correlation. PBS estimates of the prevalence of diabetes, cardiovascular disease and hypertension, dyslipidemia, and respiratory disease with comparable Australian National Health Survey in older adults showed correlations of between (r = 0.82 - 0.99) and a range of percentage error of -11% to 59%. However, other conditions such as psychological disease and migraine showed greater disparity and correlated less well.

Conclusions

Although not without limitations, Australian administrative pharmaceutical dispensing data may provide an alternative perspective on population health and a useful resource to estimate the prevalence of a number of chronic diseases within the Australian population.

Prevalence of Therapeutic use of Opioids in Chronic non-Cancer Pain Patients and Associated Factors: A Systematic Review and Meta-Analysis

Objectives: To determine the prevalence and factors associated with the use of opioids among patients with chronic non-cancer pain (CNCP).

Methods: A systematic review and meta-analysis. Comprehensive literature searches in Medline-PubMed, Embase and SCOPUS databases. Original studies published between 2009 and 2019 with a cross-sectional design were included. The quality of the studies was assessed with Critical Appraisal Checklist for Studies Reporting Prevalence Data from the Joanna Briggs Institute. Protocol registered in the International Prospective Register of Systematic Reviews with reference number: CRD42019137990.

Results: Out of the 1,310 potential studies found, 25 studies fulfilled the inclusion criteria. Most of the studies were of high quality. High levels of heterogeneity were found in the studies included. In the general population, the prevalence of long-term opioid use was 2.3% (95% CI: 1.5–3.6%), the prevalence of short-term opioid use was 8.1% (95% CI: 5.6–11.6%), and among people with chronic low back pain it was 5.8% (95% CI: 0.5–45.5%). The prevalence of opioid use among patients from the health records or medical surveys was 41% (95% CI: 23.3–61.3%). Finally, in patients with musculoskeletal pain, the prevalence was 20.5% (95% CI: 12.9–30.9%) and in patients with fibromyalgia, 24.5% (95% CI: 22.9–26.2%). A higher prevalence of opioid use was observed among men, younger people, patients receiving prescriptions of different types of drugs, smokers and patients without insurance or with noncommercial insurance. In addition, non-white and Asian patients were less likely to receive opioids than non-Hispanic white patients.

Conclusions: The prevalence of opioid use among patients with CNCP was higher in subjects with short or occasional use compared to those with long-term use. Men, younger people, more chronic pain conditions, and patients without insurance or with noncommercial insurance were most related to opioid use. However, non-white and Asian patients, and those treated by a physician trained in complementary medicine were less likely to use opioids.

A systematic review and meta-analysis of health state utility values for osteoarthritis-related conditions

BACKGROUND

Health state utility values (HSUVs) are a key input in health economic modelling but HSUVs of people with osteoarthritis (OA)-related conditions have not been systematically reviewed and meta-analysed.

OBJECTIVE

To systematically review and meta-analyse the HSUVs for people with OA.

METHODS

Searches within health economic/biomedical databases were performed to identify eligible studies reporting OA-related HSUVs. Data on study design, participant characteristics, affected OA joint sites, treatment type, HSUV elicitation method, considered health states, and the reported HSUVs were extracted. HSUVs for people with knee, hip and mixed OA in pre- and post-treatment populations were meta-analysed using random effects models.

RESULTS

One-hundred and fifty-one studies were included in the systematic review, and 88 in meta-analyses. Of 151 studies, 56% were conducted in Europe, 75% were in people with knee and/or hip OA and 79% were based on the EQ-5D. The pooled mean (95% confidence interval [CI]) baseline HSUVs for knee OA core interventions, medication, injection and primary surgery treatments were 0.64 (0.61-0.66), 0.56 (0.45-0.68), 0.58 (0.50-0.66) and 0.52 (0.49-0.55), respectively. These were 0.71 (0.59-0.84) for hip OA core interventions and 0.52 (0.49-0.56) for hip OA primary surgery. For all knee OA treatments and hip OA primary surgery, pooled HSUVs were significantly higher in the post- than the pre- treatment populations.

CONCLUSION

This study provides a comprehensive summary of OA-related HSUVs and generates a HSUVs database for people with different affected OA joint sites undergoing different treatments to guide HSUV choices in future health economic modelling of OA interventions.

Promising application of Pulsed Electromagnetic Fields (PEMFs) in musculoskeletal disorders

Increasing evidence suggests that an exogenous electromagnetic field might be involved in many biologic processes which are of great importance for therapeutic interventions. Pulsed electromagnetic fields (PEMFs) are known to be a noninvasive, safe and effective therapy agent without apparent side effects. Numerous studies have shown that PEMFs possess the potential to become a stand-alone or adjunctive treatment modality for treating musculoskeletal disorders. However, several issues remain unresolved. Prior to their widely clinical application, further researches from well-designed, high-quality studies are still required to standardize the treatment parameters and derive the optimal protocol for health-care decision making. In this review, we aim to provide current evidence on the mechanism of action, clinical applications, and controversies of PEMFs in musculoskeletal disorders.

All-Cause Opioid Prescriptions Dispensed: The Outsized Role of Adults With Arthritis

INTRODUCTION

Limited estimates of prescribed opioid use among adults with arthritis exist. All-cause (i.e., for any condition) prescribed opioid dispensed (referred to as opioid prescription in the remainder of this abstract) in the past 12 months among U.S. adults aged ≥18 years (n=35,427) were studied, focusing on adults with arthritis (n=12,875).

METHODS

In 2018-2019, estimates were generated using Medical Expenditure Panel Survey data: (1) 2015 prevalence of 1 or more opioid prescriptions to U.S. adults overall and by arthritis status and (2) in 2014-2015, among adults with arthritis, multivariable-adjusted associations between 1 or more opioid prescriptions and sociodemographic characteristics, health status, and healthcare utilization characteristics.

RESULTS

In 2015, the age-standardized prevalence of 1 or more opioid prescriptions among adults with arthritis (29.6%) was almost double of that for all adults (15.4%). Adults with arthritis represented more than half of all adults (55.3%) with at least 1 opioid prescription; among those with 1 or more prescriptions, 43.2% adults had 4 or more prescriptions. The strongest multivariable-adjusted associations with 1 or more opioid prescriptions were ambulatory care visits (1-4: prevalence ratios=1.9-2.0, 5-8: prevalence ratios=2.5-2.7, 9 or more: prevalence ratios=3.4-3.7) and emergency room visits (1: prevalence ratios=1.6, 2-3: prevalence ratios=1.9-2.0, 4 or more: prevalence ratios=2.4); Ref for both: no visits.

CONCLUSIONS

Adults with arthritis are a high-need target group for improving pain management, representing more than half of all U.S. adults with 1 or more opioid prescriptions. The association with ambulatory care visits suggests that providers have routine opportunities to discuss comprehensive and integrative pain management strategies, including low-cost evidence-based self-management approaches (e.g., physical activity, self-management education programs, cognitive behavioral therapy). Those with multiple opioid prescriptions may need extra support if transitioning to nonopioid and nonpharmacologic pain management strategies.

Systematic Review of the Evolution of Health-Economic Evaluation Models of Osteoarthritis

OBJECTIVE

To comprehensively synthesize the evolution of health-economic evaluation models (HEEMs) of all osteoarthritis (OA) interventions, including preventions, core treatments, adjunct nonpharmacologic interventions, pharmacologic interventions, and surgical treatments.

METHODS

The literature was searched within health-economic/biomedical databases. Data extracted included OA type, population characteristics, model setting/type/events, study perspective, and comparators; the reporting quality of the studies was also assessed. The review protocol was registered at the International Prospective Register of Systematic Reviews (CRD42018092937).

RESULTS

Eighty-eight studies were included. Pharmacologic and surgical interventions were the focus in 51% and 44% of studies, respectively. Twenty-four studies adopted a societal perspective (with increasing popularity after 2013), but most (63%) did not include indirect costs. Quality-adjusted life years was the most popular outcome measure since 2008. Markov models were used by 62% of studies, with increasing popularity since 2008. Until 2010, most studies used short-to-medium time horizons; subsequently, a lifetime horizon became popular. A total of 86% of studies reported discount rates (predominantly between 3% and 5%). Studies published after 2002 had a better coverage of OA-related adverse events (AEs). Reporting quality significantly improved after 2001.

CONCLUSION

OA HEEMs have evolved and improved substantially over time, with the focus shifting from short-to-medium-term pharmacologic decision-tree models to surgical-focused lifetime Markov models. Indirect costs of OA are frequently not considered, despite using a societal perspective. There was a lack of reporting sensitivity of model outcome to input parameters, including discount rate, OA definition, and population parameters. While the coverage of OA-related AEs has improved over time, it is still not comprehensive.

Primary care initiatives focused on the secondary prevention and management of chronic pain: a scoping review of the Australian literature

The aim of this scoping review was to identify initiatives focused on the secondary prevention and management of chronic pain in Australian primary care to understand options available to Primary Health Networks and to identify evidence gaps. The Medline, EMBASE, Cumulative Index to Nursing and Allied Health Literature and Cochrane databases, as well as relevant websites, were searched for eligible records published from 2007 to 2018. Initiative characteristics and outcomes evaluated were extracted and synthesised. In all, 84 initiatives from 167 published and grey literature records were identified, including: (1) consumer initiatives that aimed to improve access to multidisciplinary care, health literacy and care navigation (n=56); (2) health professional capacity building initiatives that aimed to ensure health professionals are skilled and provide best-practice evidence-based care (n=21); and (3) quality improvement and health system support initiatives (n=7). Evidence gaps were found relating to initiatives addressing the secondary prevention of chronic pain, those targeting vulnerable and regional populations, health professional capacity building initiatives for all primary health care providers and quality improvement and system support initiatives. Addressing evidence gaps related to effectiveness, cost-effectiveness and implementation should be the focus for future chronic pain initiatives in primary care settings.

Central neurobiological effects of physical exercise in individuals with chronic musculoskeletal pain: a systematic review

OBJECTIVE

Primary objectives: to investigate the central neurobiological effects (using MRI) of physical exercise in individuals with chronic pain. Secondary objectives: (1) to investigate the associations between central changes and clinical outcomes and (2) to investigate whether different types and dosages of physical exercise exert different central changes.

DESIGN

Systematic review searching four electronic databases up to September 2018: AMED, CINAHL, Embase and MEDLINE. Two reviewers independently assessed the methodological quality of included studies using the Cochrane Collaboration's Risk of Bias in Non-Randomised Studies-I tool. A standardised extraction table was used for data extraction, which was performed by two reviewers.

INTERVENTIONS

Studies reporting any physical exercise intervention in any chronic musculoskeletal pain condition were included. Eligibility of 4011 records was screened independently by two reviewers, and four studies were included in the review.

PRIMARY AND SECONDARY OUTCOME MEASURES

Primary outcome: any brain outcome assessed with any MR technique.

SECONDARY OUTCOMES

any self-reported clinical outcomes, and type and dosage of the exercise intervention.

RESULTS

All four studies had high risk of bias. There was heterogeneity between the brain areas studied and the types of exercise interventions delivered. All studies reported functional MRI changes in various brain areas following an exercise intervention. Insufficient data were available to conduct a meta-analysis or to answer the secondary aims.

CONCLUSIONS

Only a limited number of studies were available and all were at high risk of bias. None of the studies was randomised or included blinded assessment. Exercise may exert effects on brain neurobiology in people with chronic pain. Due to the high risk of bias, future studies should use a randomised study design. Investigation of morphological brain changes could be included.

PROSPERO REGISTRATION NUMBER

CRD42018108179.

Pain knowledge, attitudes and beliefs of Australian osteopaths drawn from a nationally representative sample of the profession

BACKGROUND

Pain has been identified as a global health issue with substantial effects on individuals and society. Health professionals managing pain complaints must have appropriate knowledge of pain neurophysiology, and attitudes and beliefs towards pain management that align with current practice guidelines.

OBJECTIVES

Evaluate Australian osteopaths' current level of knowledge of pain neurophysiology and their beliefs and attitudes towards pain, and explore associations with demographic variables.

METHOD

Australian osteopaths drawn from a nationally representative practice-based research network received the questionnaire. The questionnaire included demographic information, Neurophysiology of Pain Questionnaire (NPQ), Pain Attitudes and Beliefs Scale for Physiotherapists (PABS-PT) and the Attitudes to Back Pain Scale in Musculoskeletal Practitioners (ABS-mp).

RESULTS

Complete responses were received from 211 osteopaths (21.3% response rate). The mean total NPQ score was equivalent to 72.2% correct responses. The PABS-PT Biomedical scale mean score was 38.8 ( ±9.1, α = 0.81) and the Biopsychosocial scale was 22.3 ( ±3.3, α = 0.38). ABS-mp mean factor scores suggest osteopaths support psychological approaches (22.1, ±3.3, α = 0.71) but endorsed more treatment sessions for those with back pain (15.9, ±4.7, α = 0.71). Trivial correlations between measures and most demographic variables were observed. Osteopaths who undertook further studies in pain had higher mean NPQ scores, with moderate negative correlations with a lower PABS-PT Biomedical subscale score (ρ = -0.45, p < 0.01).

CONCLUSIONS

Australian osteopaths demonstrate a range of pain neurophysiology knowledge, and beliefs and attitudes towards pain. The findings support the positive impact of professional development for improving pain knowledge in this population.

What proportion of patients with chronic noncancer pain are prescribed an opioid medicine? Systematic review and meta-regression of observational studies

Guidelines now discourage opioid analgesics for chronic noncancer pain because the benefits frequently do not outweigh the harms. We aimed to determine the proportion of patients with chronic noncancer pain who are prescribed an opioid, the types prescribed and factors associated with prescribing. Database searches were conducted from inception to 29 October 2018 without language restrictions. We included observational studies of adults with chronic noncancer pain measuring opioid prescribing. Opioids were categorized as weak (e.g. codeine) or strong (e.g. oxycodone). Study quality was assessed using a risk of bias tool designed for observational studies measuring prevalence. Individual study results were pooled using a random-effects model. Meta-regression investigated study-level factors associated with prescribing (e.g. sampling year, geographic region as per World Health Organization). The overall evidence quality was assessed using Grading of Recommendations Assessment, Development and Evaluation criteria. Of the 42 studies (5,059,098 participants) identified, the majority (n = 28) were from the United States of America. Eleven studies were at low risk of bias. The pooled estimate of the proportion of patients with chronic noncancer pain prescribed opioids was 30.7% (95% CI 28.7% to 32.7%, n = 42 studies, moderate-quality evidence). Strong opioids were more frequently prescribed than weak (18.4% (95% CI 16.0-21.0%, n = 15 studies, low-quality evidence), versus 8.5% (95% CI 7.2-9.9%, n = 15 studies, low-quality evidence)). Meta-regression determined that opioid prescribing was associated with year of sampling (more prescribing in recent years) (P = 0.014) and not geographic region (P = 0.056). Opioid prescribing for patients with chronic noncancer pain is common and has increased over time.

An Internet-Based Consumer Resource for People with Low Back Pain (MyBackPain): Development and Evaluation

People increasingly use the internet to obtain information about health complaints, including low back pain (LBP). LBP is the leading cause of disability internationally, and outcomes are worsening. There is an urgent need for resources that aid improvement of outcomes. There have been calls to engage consumers in the development of resources, but this has rarely been implemented. MyBackPain is a website that was developed with extensive involvement of consumers to ensure that the resource meets their needs for content and presentation. This paper aimed to describe the multistep process undertaken to develop the MyBackPain website and provide an extensive evaluation of its impact. Development of MyBackPain involved 10 steps, many of which have been published in the academic literature. These steps included consultation regarding consumer needs, evaluation of existing internet resources, identification of key messages to be reinforced, identification of frequently asked questions, consensus for content, content development (including development of algorithms to guide tailoring of the user experience), development of consumer-focused evidence-based treatment summaries, development of descriptions of health care providers, and testing. Evaluation included qualitative examination of people's interactions with the website and its effects on their daily lives and an ongoing randomized controlled trial of impact of use of the site on people's LBP-related health literacy, clinical outcomes, and treatment choices. It is hoped that the website can aid in the reduction of the massive burden of LBP and provide a template for the development of resources for other conditions.

Pain Self-Management: Easier Said than Done? Factors Associated with Early Dropout from Pain Self-Management in a Rural Primary Care Population

OBJECTIVE

To explore whether psychosocial or demographic factors are associated with early dropout from pain self-management in a rural, low-socioeconomic status population.

DESIGN

Secondary analysis of retrospective data.

SETTING

Multidisciplinary pain clinic located in an outer regional area of Australia.

SUBJECTS

One hundred eighty-six people attending a public community health center with chronic noncancer pain (mean age 54.9 years; 58.1% women; 81.7% in receipt of government benefit as their primary source of income).

METHODS

Bivariate analysis and logistic regression, with early dropout as the dependent variable and a range of demographic and psychological independent variables.

RESULTS

Following bivariate analysis, early dropout was significantly associated (P < 0.05) with male gender, younger age, history of substance use, being a past victim of assault/abuse, receiving unemployment or disability benefit, having literacy difficulties, higher pain catastrophizing score, higher daily opioid dose, and not holding a multifactorial belief about the cause of pain. Logistic regression analysis resulted in three significant predictors of dropout: substance use history (P = 0.002), past victim of assault or abuse (P = 0.029), high pain catastrophising score (P = 0.048); and one of engagement: holding a multifactorial belief about pain cause (P = 0.005).

CONCLUSIONS

In a rural, low-socioeconomic status population, addressing social stressors related to lifetime adversity may be important to increasing engagement in pain self-management. Lack of attention to these factors may increase health inequity among those most disabled by chronic pain. Further research into dropout and engagement, especially among disadvantaged populations, is recommended.