Prevalence and Characteristics of Widespread Pain in Female Primary Health Care Patients With Chronic Low Back Pain

Movement-Evoked Pain Versus Widespread Pain: A Longitudinal Comparison in Older Adults With Chronic Low Back Pain From the Delaware Spine Studies

It is currently unknown which pain-related factors contribute to long-term disability and poorer perceived health among older adults with chronic low back pain (LBP). This investigation sought to examine the unique influence of movement-evoked pain (MeP) and widespread pain (WP) on longitudinal health outcomes (ie, gait speed, perceived disability, and self-efficacy) in 250 older adults with chronic LBP. MeP was elicited with 3 standardized functional tests, while presence of WP was derived from the McGill Pain Map. Robust regression with HC3 standard errors was used to examine associations between these baseline pain variables and health outcomes at 12-month follow-up. Covariates for these models included age, sex, body mass index, resting and recall LBP intensity, LBP duration, depression, pain catastrophizing, and baseline outcome (eg, baseline gait speed). Greater MeP was independently associated with worse 12-month LBP-related disability (b = .384, t = 2.013, P = .046) and poorer self-efficacy (b = -.562, t = -2.074, P = .039); but not gait speed (P > .05). In contrast, WP and resting and recall LBP intensity were not associated with any prospective health outcome after adjustment (all P > .05). Compared to WP and resting and recall LBP intensity, MeP is most strongly related to longitudinal health outcomes in older adults with chronic LBP. PERSPECTIVE: This article establishes novel independent associations between MeP and worse perceived disability and self-efficacy at 12-months in older adults with chronic LBP. MeP likely has biopsychosocial underpinnings and consequences and may therefore be an important determinant of health outcomes in LBP and other geriatric chronic pain populations.

Experience of co-creation of a health plan and support for sustainable physical activity among people with chronic widespread pain: a qualitative interview study in Sweden

OBJECTIVES

The aim of this study was to gain deeper knowledge about how people with chronic widespread pain (CWP) experience the co-creation of a health plan for sustainable physical activity, working in partnership with a physiotherapist, supported by a digital platform.

DESIGN

Qualitative semistructured in-depth individual interviews were analysed with qualitative content analysis.

SETTING

Five primary healthcare centres in western Sweden.

PARTICIPANTS

The interviewees comprised 19 individuals with CWP who had previously participated in a person-centred intervention involving co-creation of a health plan and support via a digital platform. The interviews were carried out from late 2019 to spring 2020, 1-6 months after the respondents' final follow-up.

RESULTS

The analysis resulted in an overarching theme; hope for physical activity that actually works, illustrating the experience of taking part in co-creating a reasonable health plan, based on the respondents' own goals and interests with the potential to actually work. This theme was based on two categories: a plan tailored for me and a frame for participation and accessibility to help fulfil the plan. The digital platform provided a way to participate and an assurance that there was someone there for them if necessary.

CONCLUSIONS

The co-creation of a health plan nurtured hope of having developed a manageable plan for physical activity that could lead to improved future health and well-being. Digital support may serve as a valuable complement in order to sustain and adjust the planned physical activity.

TRIAL REGISTRATION NUMBER

ClinicalTrials.gov Identifier: NCT03434899.

Reduction in movement-evoked pain and fatigue during initial 30-minute transcutaneous electrical nerve stimulation treatment predicts transcutaneous electrical nerve stimulation responders in women with fibromyalgia

ABSTRACT

We previously showed that 1 month of transcutaneous electrical nerve stimulation (TENS) reduces movement-evoked pain and fatigue in women with fibromyalgia (FM). Using data from this study (Fibromyalgia Activity Study with TENS [FAST]), we performed a responder analysis to identify predictors of clinical improvement in pain and fatigue with TENS, validated these models using receiver operator characteristic, and determined number needed to treat and number needed to harm. Participants were randomly assigned to active-TENS (2-125 Hz; highest-tolerable intensity), placebo-TENS, or no-TENS for 1 month. At the end of the randomized phase, placebo-TENS and no-TENS groups received active-TENS for 1 month. The predictor model was developed using data from the randomized phase for the active-TENS group (n = 103) and validated using data from placebo-TENS and no-TENS groups after active-TENS for 1 month (n = 155). Participant characteristics, initial response to TENS for pain and fatigue, sleep, psychological factors, and function were screened for association with changes in pain or fatigue using a logistic regression model. Predictors of clinical improvement in pain were initial response to pain and widespread pain index (area under the curve was 0.80; 95% confidence interval: 0.73-0.87). Predictors of clinical improvement in fatigue were marital status, sleep impairment, and initial response to TENS (area under the curve was 0.67; 95% confidence interval: 0.58-0.75). Number needed to treat for pain and fatigue ranged between 3.3 and 5.3. Number needed to harm ranged from 20 to 100 for minor TENS-related adverse events. The response to an initial 30-minute TENS treatment predicts who responds to longer-term TENS use in women with FM, making this a clinically useful procedure. Number needed to treat and number needed to harm suggest that TENS is effective and safe for managing pain and fatigue in FM.

Development and validation of a daily Injustice Experience Questionnaire

BACKGROUND

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

METHODS

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

RESULTS

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

CONCLUSIONS

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

SIGNIFICANCE

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

Pain drawings, interpreter support and clinical findings among immigrant patients on sick leave in Swedish primary health care

Aim:

To evaluate the spread of pain and its correlates among immigrant patients on sick leave.

Background:

Backache, outspread pain and sick-leave questions are problematic to handle primary health care, especially in multicultural settings.

Methods:

Two hundred and thirty-five patients 20–45 years on paid sick leave (59% women, 93% foreign-born, mostly non-Europeans). Many had little formal education. One-third had professional interpreter support. The patients pointed out on their bodies where they felt pain. This information was transferred on a pain drawing [pain drawing fields (PDFs) 0–18] by a doctor. Major depression and psychosocial stressors were assessed using Diagnostic and Statistical Manual of Mental Disorders. Nociceptive locations for pain were established (pain-sites 0–18). Dependent variable was the number of PDFs. Independent variables were social data, sick leave, interpreter, depression, stress levels and number of pain sites. Calculations were done using descriptive methods and multi-variable linear regression in full models, by gender.

Findings:

Many patients had depression (51% women versus 32% men). A majority were exposed to psychosocial stressors. Women had more PDFs, in median 5 [inter-quartile ranges (IQR) 4–8] versus men 3 (IQR 2–5), and also more pain sites, in median 3 (IQR 2–5) versus men in median 2 (IQR 1–3). For men, the regression calculations revealed that numbers of PDFs associated only with increasing numbers of pain sites (B 0.871 P < 0.001). For women, this association was weaker (B 0.364, P < 0.001), with significant values also for age (B 0.103) and sick leave > one year (B 0.767, P = 0.010), and a negative predicting value for interpreter support (B −1.198, P < 0.043). To conclude, PDFs associated often with somatic findings but varied much among the women. This implies potential problems regarding cause, function and sick leave questions. However, support by professional interpreters may facilitate a shared understanding with immigrant women having long-standing pain.

Difference in the impact of central sensitization on pain-related symptoms between patients with chronic low back pain and knee osteoarthritis

Purpose: The aims of the present study were to investigate whether the association between the Central Sensitization Inventory (CSI) score, pain-related symptoms, pain-related disability, and health-related quality of life differed by disease (chronic low back pain [CLBP] vs knee osteoarthritis [KOA]), and to determine optimal cutoff scores for the CSI reflecting disease-specific characteristics.

Patients and methods: A total of 104 patients with CLBP and 50 patients with KOA were recruited. Central sensitization-related symptoms (CSI), EuroQol 5-dimension (EQ-5D), Brief Pain Inventory, widespread pain (Widespread Pain Index [WPI]), pressure pain threshold (PPT), and temporal summation (TS) were assessed and compared between the CLBP and KOA groups. Univariate correlation analysis was performed in each group. The receiver operating characteristic (ROC) curve analysis was performed to identify 1) presence/absence of central sensitization (CS), 2) presence/absence of central sensitivity syndromes (CSSs), and 3) pain intensity and pain interference in each group.

Results: The CSI and WPI scores were significantly higher in the CLBP group than in the KOA group. EQ-5D and pain interference scores significantly correlated with the CSI score in both the CLBP and KOA groups. The WPI score, PPT, and TS did not correlate with the CSI score in either the CLBP or KOA group. The suggested cutoff scores were 28 in the CLBP group and 17 in the KOA group to identify presence or absence of CSSs, and 34 in the CLBP group and 18–19 in the KOA group to identify pain severity.

Conclusion: The impact of CS on pain could differ between CLBP and KOA and that cutoff scores differ by each parameter we attempted to identify. Therefore, we should use the appropriate cutoff scores for the purposes and consider the difference in the impact of CS on pain by the patient group.

Prevalence and predictors of persistent pelvic girdle pain 12 years postpartum

BACKGROUND

Pelvic girdle pain (PGP) is not always a self-limiting condition. Women with more pronounced persistent PGP (PPGP) report poorer health status compared to women with less pronounced symptoms. The knowledge concerning the long-term consequences of PPGP is limited, thus more knowledge in this area is needed. The overall aim was to study the prevalence and predictors of PPGP 12 years after delivery.

METHODS

This is a long-term follow-up study based on a previous cohort study that commenced in 2002. New questionnaire data 12 years postpartum were collected in 2014 and early 2015. The questionnaire was distributed to a total of 624 women from the initial cohort.

RESULTS

In total, 295 women (47.3%) responded to the questionnaire where 40.3% (n = 119) reported pain to a various degree and 59% (n = 174) reported no pain. Increased duration and/or persistency of pain, self-rated health, sciatica, neck and/or thoracic spinal pain, sick leave the past 12 months, treatment sought, and prescription and/or non-prescription drugs used were all associated with an statistically significant increase in the odds of reporting pain 12 years postpartum. Widespread pain was common and median expectation of improvement score was 5 on an 11-point numeric scale (interquartile range 2-7.50). More than one of five women (21.8%) reporting pain stated that they had been on sick leave the past 12 months and nearly 11% had been granted disability pension due to PPGP. No statistically significant differences were found between respondents and non-respondents regarding most background variables.

CONCLUSIONS

This study is unique as it is one of few long-term follow-up studies following women with PPGP of more than 11 years. The results show that spontaneous recovery with no recurrences is an unlikely scenario for a subgroup of women with PPGP. Persistency and/or duration of pain symptoms as well as widespread pain appear to be the strongest predictors of poor long-term outcome. Moreover, widespread pain is commonly associated with PPGP and may thus contribute to long-term sick leave and disability pension. A screening tool needs to be developed for the identification of women at risk of developing PPGP to enable early intervention.

Predictors for future activity limitation in women with chronic low back pain consulting primary care: a 2-year prospective longitudinal cohort study

OBJECTIVES

To assess if body function, activity, participation, health-related quality of life and lifestyle behavioural factors can predict activity limitation in women with chronic low back pain (CLBP) in primary healthcare (PHC) 2 years later.

DESIGN

A 2-year prospective longitudinal cohort study within PHC.

SETTINGS

PHC in southwestern Sweden.

PARTICIPANTS

The cohort comprised 130 women with CLBP attending PHC at baseline 2004-2005 and were reassessed after 2 years.

MEASURES

The dependent outcome variable was self-reported activity limitation (Roland Morris disability questionnaire (RMDQ)) at 2-year follow-up. Independent predictors at baseline were age, body mass index, smoking, alcohol consumption, sleep quantity and quality, leisure time physical activity, a questionnaire of clinical manifestation of stress (Stress and Crises Inventory (SCI-93)), pain localisation, pain intensity, fatigue, anxiety, depression, RMDQ, work status, private social support, health-related quality of life and measures of physical performance specified as 6 min walk test (6MWT) and hand grip strength. Relation between baseline predictors and variation in later self-reported activity limitation (RMDQ) was analysed using multivariate linear regression.

RESULTS

Ninety-five per cent (n=123/130) were followed up after 2 years. The participants were middle-aged (mean 45 (SD 10) years), mostly educated >9 years (88%; 108/123), mainly living with another adult (76%; 93/122) and born in Sweden (90%; 111/123). Seventy-nine per cent (97/123) were categorised as having work ability at baseline. The final prognostic model including 6MWT, SCI-93 and RMDQ at baseline explained 54% of the variance in self-reported activity limitation (RMDQ) at the 2-year follow-up.

CONCLUSIONS

Lower physical performance, more severe clinical stress symptoms and more severe activity limitation predicted activity limitation after 2 years in women with CLBP within PHC. The results can give guidance for interventional trials aiming to improve physical capacity and decrease stress. The impact of the interaction between prognostic factors and interventions on activity limitation needs further investigation.

Different DHEA-S Levels and Response Patterns in Individuals with Chronic Neck Pain, Compared with a Pain Free Group-a Pilot Study

Objective

To test, in this pilot study, whether DHEA-S (Dehydroepiandrosterone, sulfated form) plasma levels are lower among persons with chronic neck pain, compared to control persons, and to investigate the DHEA-S response after a physical exercise.

Subjects

Included were 12 persons with chronic neck pain and eight controls without present pain, all 18 and 65 years of age. Exclusion criteria for both groups were articular diseases or tendinosis, fibromyalgia, systemic inflammatory and neuromuscular diseases, pain conditions due to trauma, or severe psychiatric diseases.

Design and methods

The participants arm-cycled on an ergometer for 30 minutes. Blood samples were taken before, 60 minutes, and 150 minutes after this standardized physical exercise.

Results

The estimated plasma DHEA-S levels at baseline were 2.0 µmol/L (95% confidence interval [CI] 1.00; 4.01) in the pain group and 4.1 µmol/L (95% CI2.0; 8.6) in the control group, adjusted for sex, age, body mass index (BMI), and Shirom-Melamed Burnout Questionnaire (SMBQ), with a ratio of 0.48 ( P  = 0.094).

Conclusions

In this pilot study, the plasma DHEA-S levels appeared to be lower among the persons with chronic neck pain, compared with the control group. It was indicated that DHEA-S decreased during the physical exercise in the control group, and either increased or was unaffected in the chronic pain group.

Characterization of Whole Body Pain in Urological Chronic Pelvic Pain Syndrome at Baseline: A MAPP Research Network Study

PURPOSE

We characterized the location and spatial distribution of whole body pain in patients with urological chronic pelvic pain syndrome using a body map. We also compared the severity of urinary symptoms, pelvic pain, nonpelvic pain and psychosocial health among patients with different pain patterns.

MATERIALS AND METHODS

A total of 233 women and 191 men with urological chronic pelvic pain syndrome enrolled in a multicenter, 1-year observational study completed a battery of baseline measures, including a body map describing the location of pain during the last week. Participants were categorized with pelvic pain if they reported pain in the abdomen and pelvis only. Participants who reported pain beyond the pelvis were further divided into 2 subgroups based on the number of broader body regions affected by pain, including an intermediate group with 1 or 2 additional regions outside the pelvis and a widespread pain group with 3 to 7 additional regions.

RESULTS

Of the 424 enrolled patients 25% reported pelvic pain only and 75% reported pain beyond the pelvis, of whom 38% reported widespread pain. Participants with a greater number of pain locations had greater nonpelvic pain severity (p <0.0001), sleep disturbance (p = 0.035), depression (p = 0.005), anxiety (p = 0.011), psychological stress (p = 0.005) and negative affect scores (p = 0.0004), and worse quality of life (p ≤0.021). No difference in pelvic pain and urinary symptom severity was observed according to increasing pain distribution.

CONCLUSIONS

Three-quarters of the men and women with urological chronic pelvic pain syndrome reported pain outside the pelvis. Widespread pain was associated with greater severity of nonpelvic pain symptoms, poorer psychosocial health and worse quality of life but not with worse pelvic pain or urinary symptoms.

Health Related Quality of Life in a Dutch Rehabilitation Population: Reference Values and the Effect of Physical Activity

PURPOSE

To establish reference values for Health Related Quality of Life (HRQoL) in a Dutch rehabilitation population, and to study effects of patient characteristics, diagnosis and physical activity on HRQoL in this population.

METHOD

Former rehabilitation patients (3169) were asked to fill in a questionnaire including the Dutch version of the RAND-36. Differences between our rehabilitation patients and Dutch reference values were analyzed (t-tests). Effects of patient characteristics, diagnosis and movement intensity on scores on the subscales of the RAND-36 were analyzed using block wise multiple regression analyses.

RESULTS

In total 1223 patients (39%) returned the questionnaire. HRQoL was significantly poorer in the rehabilitation patients compared to Dutch reference values on all subscales (p<0.001) except for health change (p = 0.197). Longer time between questionnaire and last treatment was associated with a smaller health change (p = 0.035). Higher age negatively affected physical functioning (p<0.001), social functioning (p = 0.004) and health change (p = 0.001). Diagnosis affected outcomes on all subscales except role limitations physical, and mental health (p ranged <0.001 to 0.643). Higher movement intensity was associated with better outcomes on all subscales except for mental health (p ranged <0.001 to 0.190).

CONCLUSIONS

HRQoL is poorer in rehabilitation patients compared to Dutch reference values. Physical components of HRQoL are affected by diagnosis. In rehabilitation patients an association between movement intensity and HRQoL was found. For clinical purposes, results of this study can be used as reference values for HRQoL in a rehabilitation setting.

Prevalence of chronic spinal pain and identification of associated factors in a sample of the population of São Paulo, Brazil: cross-sectional study

CONTEXT AND OBJECTIVE:

Chronic spinal pain, especially low-back pain and neck pain, is a leading cause of years of life with disability. The aim of the present study was to estimate the prevalence of chronic spinal pain among individuals aged 15 years or older and to identify the factors associated with it.

DESIGN AND SETTING:

Cross-sectional epidemiological study on a sample of the population of the city of São Paulo.

METHOD:

Participants were selected using random probabilistic sampling and data were collected via face-to-face interviews. The Hospital Anxiety and Depression Scale (HADS), EuroQol-5D, Alcohol Use Disorders Identification Test (AUDIT), Fagerström test for nicotine dependence and Brazilian economic classification criteria were used.

RESULTS:

A total of 826 participants were interviewed. The estimated prevalence of chronic spinal pain was 22% (95% confidence interval, CI: 19.3-25.0%). The factors independently associated with chronic spinal pain were: female sex, age 30 years or older, schooling level of four years or less, symptoms compatible with anxiety and high physical exertion during the main occupation. Quality of life and self-rated health scores were significantly worse among individuals with chronic spinal pain.

CONCLUSION:

The prevalence of chronic spinal pain in this segment of the population of São Paulo was 22.0%. The factors independently associated with chronic pain were: female sex, age 30 years or older, low education, symptoms compatible with anxiety and physical exertion during the main occupation.

No association between level of vitamin D and chronic low back pain in Swedish primary care: a cross-sectional case-control study

OBJECTIVE

Assessment of vitamin D levels and deficiency status in individuals with chronic low back pain (CLBP) in a Swedish general population, compared with controls matched for sex and age.

DESIGN

Cross-sectional case-control study.

SETTING

Primary care, southern Sweden.

SUBJECTS

Participants (n = 44) with self-reported low back pain for at least 3 months and individually sex- and age-matched controls without a chronic pain condition (n = 44), recruited from the general population by random letter of invitation.

MAIN OUTCOME MEASURE

Association between vitamin D level and CLBP when adjusting for possible confounders in a multivariate forward conditional logistic regression model.

RESULTS

Mean S-25-hydroxyvitamin D levels were 81 and 80 nmol/L in the CLBP and control group, respectively. The prevalence of vitamin D deficiency was low and similar in the CLBP group and the control group. Vitamin D level was not associated with CLBP when potential confounders were taken into account.

CONCLUSIONS

No difference in vitamin D levels between participants with CLBP and matched controls could be demonstrated in the present sample. Assessment of vitamin D level and deficiency status may be of questionable value in the management of CLBP in primary care settings at similar latitudes, unless there are additional risk factors for deficiency or specific indicators of osteomalacia. Key points Vitamin D deficiency is common and reported in many chronic pain conditions, including chronic low back pain (CLBP), but evidence for an association and causality is insufficient. • The present study found no association between vitamin D levels and CLBP in a case-control sample of 44 + 44 individuals from the Swedish general population. • Prevalence of vitamin D deficiency was low and comparable in individuals with CLBP and controls without chronic pain, matched for sex and age. • Assessment of vitamin D status, for the purpose of finding and treating an underlying cause of pain, may be of limited value in the management of CLBP in primary care settings at similar latitudes.

Resilience moderates the association between chronic pain and depressive symptoms in the elderly

BACKGROUND

Chronic pain is frequent in elderly people and, especially if widespread, associated with poor mental health. We investigated whether a resilient personality protects older adults against the adverse effects of chronic pain.

METHODS

Pain status [no pain, chronic local pain (CLP) and chronic widespread pain (CWP)] was determined using the American College of Rheumatologists' criteria for widespread pain in a cross-sectional sample of 724 participants aged 68-92 years drawn from the population-based KORA-Age study in Southern Germany. Depressive symptoms and resilience were assessed via the scales GDS-15 and RS-5. The relation between pain, resilience and depressive symptoms was modelled using logistic and quantile regression.

RESULTS

CLP prevalence and CWP prevalence were 57.5% and 12.3%, respectively. Confounder-adjusted logistic regression indicated a fourfold risk of depressed mood (GDS-15 ≥ 5) in CWP, vs. no pain (OR = 4.08, 95% CI 1.90-8.74). However, in quantile regression, the adverse effect of CWP was significantly attenuated by resilience when looking at the GDS-15 score lower quartile (p = 0.011) and median (p = 0.011). This effect appeared to be mainly driven by participants aged 75-84 years. Confounder adjustment reduced the effect of CLP on depressive symptoms to non-significance, and effect modification by resilience was undetectable in regression models of CLP.

CONCLUSIONS

Resilience was protective in the association of CWP with depressive symptoms in this analysis. Older adults with CWP may potentially benefit from interventions supporting resilience. Prospective research should investigate the protective role of resilience in the potentially self-perpetuating relation between chronic pain and depressed affect. WHAT DOES THIS STUDY ADD?: The association of chronic widespread pain with depressive symptoms in the elderly population is attenuated by resilience.

Even Worse - Risk Factors and Protective Factors for Transition from Chronic Localized Low Back Pain to Chronic Widespread Pain in General Practice: A Cohort Study

STUDY DESIGN

Prospective cohort study with patients with chronic low back pain (CLBP) at primary care setting.

OBJECTIVE

The aim of our study was to identify predictors for transition from localized CLBP to chronic widespread pain in general practice. In contrast to the typically investigated risk factors, this study also focuses intensively on protective factors, which decrease the probability of chronic widespread pain. For this, we investigated the resources resilience and coping strategies, which are suspected as potential protective factors for incident chronic pain syndromes.

SUMMARY OF BACKGROUND DATA

In primary care, about a quarter of patients with CLBP experience chronic widespread pain (CWP).

METHODS

Patients experiencing localized CLBP were included and evaluated after a 6- and 12-month follow-up period regarding the development of CWP. Potential risk factors (sociodemographic data, pain characteristics, depression, anxiety, somatization), protective factors (resilience, coping strategies), and sample characteristics were assessed at baseline. Predictor identification was done by multivariate logistic regression analysis.

RESULTS

The 1-year incidence for the onset of CWP among patients with CLBP was 23.8%. We identified the 3 risk factors, female sex, long duration of back pain, and a high rate of psychosomatic symptoms, for the onset of CWP among patients with CLBP. Coping resources and resilience had no impact on the transition from CLBP to CWP.

CONCLUSION

The results suggest that CWP is no independent entity but rather a particularly negative occurrence on a continuum of chronic pain. Processes of somatization play a major role in the development of this extreme.

LEVEL OF EVIDENCE

2.

Comorbidities, intensity, frequency and duration of pain, daily functioning and health care seeking in local, regional, and widespread pain - a descriptive population-based survey (SwePain)

BACKGROUND

The clinical knowledge of factors related to the spread of pain on the body has increased and understanding these factors is essential for effective pain treatment. This population-based study examines local (LP), regional (RP), and widespread pain (WSP) on the body regarding comorbidities, pain aspects, and impact of pain and elucidates how the spread of pain varies over time.

MATERIAL AND METHODS

A postal questionnaire that addressed pain aspects (intensity, frequency, duration and anatomical spreading on a body manikin), comorbidities and implications of pain (i.e., work situation, physical activity, consumption of health care and experience of hospitality and treatment of health care) was sent to 9000 adults living in southeastern Sweden. Of these, 4774 (53 %) completed and returned the questionnaire. After 9 weeks, a follow-up questionnaire was sent to the 2983 participants who reported pain in the first questionnaire (i.e. 62 % of 4774 subjects). Of these, 1940 completed and returned the questionnaire (i.e. 65 % of 2983 subjects). The follow-up questionnaire included the same items as the first questionnaire.

RESULTS

This study found differences in intensity, frequency and duration of pain, comorbidities, aspects of daily functioning and health care seeking in three pain categories based on spreading of pain: LP, RP and WSP. Compared to the participants with RP and LP, the participants with WSP had lower education and worse overall health, including more frequent heart disease and hypertension. In addition, participants with WSP had more intense, frequent, and long-standing pain, required more medical consultations, and experienced more impact on work. The participants with RP constituted an intermediate group regarding frequency and intensity of pain, and impact on work. The participants with LP were the least affected group regarding these factors. A substantial transition to RP had occurred by the 9-week follow-up.

CONCLUSIONS

This study shows an association between increased spread of pain and prevalence of heart disease, hypertension, more severe pain characteristics (i.e., intensity, frequency and duration), problems with common daily activities and increased health care seeking. The WSP group was the most affected group and the LP group was the least affected group. Regarding these factors, RP was an obvious intermediate group. The transitions between the pain categories warrant research that broadly investigates factors that increase and decrease pain.

Multidisciplinary rehabilitation for chronic widespread musculoskeletal pain: results from daily practice

INTRODUCTION

Evidence for the efficacy of a multi-component approach for chronic widespread musculoskeletal pain (CWP) has been reported, although the effects are overall moderate and this approach has rarely been investigated in real life.

AIM

The aim of the study was to describe the effects of a 15-week multidisciplinary pain rehabilitation programme on pain, activities and participation in patients with CWP.

METHODS

The current retrospective study used data which were routinely gathered on all consecutive patients with CWP referred to a rehabilitation programme over a 21-month period. The 15-week multidisciplinary rehabilitation programme consisted of cognitive behavioural therapy and exercise, as well as individual and group sessions with additional treatment modalities. Assessments included the Pain Disability Index (PDI), the Pain Catastrophizing Scale (PCS), the Multidimensional Pain Inventory (MPI), numerical scales for pain and fatigue, the Canadian Occupational Performance Measure (COPM), the one-minute stair-climb test and the RAND-36. Paired t-tests and Wilcoxon signed-rank tests were carried out to analyse changes over time.

RESULTS

A total of 165 patients were included [mean age 44.1 (standard deviation 12.9) years], 143 (87%) women). Discharge data were available for 154 patients (93%). All outcomes showed statistically significant improvements between admission and discharge (p<0.05), with the largest effect sizes (>1.0) observed for the COPM. A longer duration of complaints was associated with less improvement in the PDI.

DISCUSSION AND CONCLUSION

In daily rehabilitation practice, a 15-week multidisciplinary treatment programme for patients with CWP showed statistically significant improvements in pain, activities and participation over time. Future studies are needed further to substantiate the long-term cost-effectiveness, and to identify the patients who benefit the most.

Prognostic factors for work ability in women with chronic low back pain consulting primary health care: a 2-year prospective longitudinal cohort study

OBJECTIVES

To investigate prognostic factors for future work ability in women with chronic low back pain (CLBP) consulting primary health care.

METHODS

A 2-year prospective longitudinal cohort study of female patients with CLBP within the primary health care was conducted. Patients were assessed at the first assessment and after 2 years. Prognostic factors for work ability (yes/no) were analyzed by multivariate regression.

RESULTS

A total of 130 patients were included at first assessment. After 2 years, 123 patients (95%) were followed up. The 6-minute walk test, depression, and earlier work ability predicted work ability at the 2-year follow-up. A nomogram was constructed to assess the probability of future work ability.

DISCUSSION

The 6-minute walk test, work ability, and depression predicted work ability for women with CLBP after 2 years.

Efficacy and Safety of Auriculopressure for Primary Care Patients with Chronic Non-Specific Spinal Pain: A Multicentre Randomised Controlled Trial

Background

Chronic uncomplicated musculoskeletal pain in the spine (cervical, thoracic or lumbar) is highly prevalent and may severely limit the daily activities of those affected by it.

Objective

To evaluate the efficacy and safety of treatment with auriculopressure applied to patients with non-specific spinal pain.

Methods

A multicentre randomised controlled trial with two parallel arms (true auriculopressure (TAP) and placebo auriculopressure (PAP)) was performed. The intervention phase lasted 8 weeks and outcomes were measured 1 week after the last intervention (T1) and 6 months after baseline (T2). The primary outcome measure was change in pain intensity according to a 100 mm visual analogue scale (pain VAS) at T1. Secondary outcome measures were the Lattinen index, the McGill Pain Questionnaire and the SF-12 health-related quality of life scale (Spanish version in every case).

Results

There were 265 participants (TAP group, n=130; PAP group, n=135). Pain was most frequently located in the upper back (55.1%, n=146), followed by the lower back (25.3%, n=67) and the dorsal area (12.5%, n=33). Nineteen patients (7.2%) reported pain affecting the entire spine. There were statistically significant differences between TAP and PAP in the change in the pain VAS at T1 of 10 mm (95% CI 2.8 to 17.3, p=0.007) and in the change in the pain VAS at T2 of 7.2 mm (95% CI 0.02 to 14.3, p=0.049) in favour of TAP. We also observed a statistically significant difference of 3.4 points in the physical component of the SF-12 in favour of TAP at T2 (95% CI 0.45 to 6.3, p=0.024). No severe adverse effects were detected or reported during treatment.

Conclusions

The application of auriculopressure in patients with non-specific spinal pain in primary healthcare is effective and safe, and therefore should be considered for inclusion in the portfolio of primary healthcare services.

Trial Registration Number

ISRCTN01897462.

Psychosocial aspects of everyday life with chronic musculoskeletal pain: A systematic review

Background and objective Chronic pain is a growing phenomenon worldwide. It is considered a medical problem because, besides the socio-economic issues involved, pain is often accompanied by psychosocial problems. Apart from the physical pain, living with chronic pain has many additional consequences. People living with chronic pain generally suffer from other physical and psychological consequences. The impact of chronic pain varies enormously between individuals, but the suffering is frequently pervasive and detrimental. The objective of this study was to review the evidence concerning, ways in which people living with chronic pain are affected in their everyday lives. Methods Electronic databases Scopus, Cinahl and PsycINFO were searched from 2008 to September 2012 using a 'building blocks' approach and reference lists were scanned. PubMed was also searched and checked for duplicates compared to Scopus, Cinahl and PsycINFO. Data were extracted from included studies and methodological quality assessed with a view to exploring quality differences. To guide the review and interpretation, individual components of methodological quality were compared against a checklist. A narrative synthesis was formulated involving three categories: (1) clinical aspects, (2) everyday life aspects and (3) interpersonal aspects. Results The search strategy identified 1140 citations; one study was found during the preliminary searching through references, and a search of reference lists provided five publications. Of these, 24 publications, representing 23 populations, met the inclusion criteria. In total, there were 22 cross-sectional studies and 2 cohort studies. Study populations ranged from 74 to 3928 participants and were heterogeneous in nature across studies with respect to age, duration and localisations of pain and outcome measures. We found a general consensus that life with chronic pain was associated with higher prevalence and higher levels of depression and diagnoses of widespread pain and nonspecific pain are more clearly associated with depression than is specific pain. The results of link between chronic pain and anxiety and stress were not obvious. Overall, there is plausible evidence to suggest a positive relationship between chronic pain and disability and the evidence is stronger for a significant positive association between nonspecific pain and disability, compared to specific pain. It can be summarized that there is a lack of evidence for a relationship between intensity of pain and quality of life. However, there is evidence that nonspecific pain is more compellingly associated with low quality of life than is specific pain. The evidence of a positive relation between pain and problems in close relations is not convincing but there is an indication to suggest that there is a pain-related issue regarding participation in many social aspects of everyday life. Conclusion Besides the pain itself, people living with chronic pain are affected in other aspects of life. In particular, it is evident that they experience challenges with respect to depressive thoughts, disability, lower quality of life and conflicts in close relationships. Implications When designing interventions for people with chronic pain, it is essential to take into consideration the fact that living with chronic pain has far-reaching consequences beyond the pain suffered.

Differences between patients with chronic widespread pain and local chronic low back pain in primary care--a comparative cross-sectional analysis

Background

Chronic pain is a common reason for consultation in general practice. Current research distinguishes between chronic localized pain (CLP) and chronic widespread pain (CWP). The aim of this study was to identify differences between CWP and chronic low back pain (CLBP), a common type of CLP, in primary care settings.

Methods

Fifty-eight German general practitioners (GPs) consecutively recruited all eligible patients who consulted for chronic low back pain during a 5-month period. All patients received a questionnaire on sociodemographic data, pain characteristics, comorbidities, psychosomatic symptoms, and previous therapies.

Results

GPs recruited 647 eligible patients where of a quarter (n = 163, 25.2%) met the CWP criteria according to the American College of Rheumatology. CWP patients had significantly more comorbidities and psychosomatic symptoms, showed longer pain duration, and suffered predominantly from permanent pain instead of distinguishable pain attacks. CWP patients were more often females, are less working and reported a current pension application or a state-approved grade of disability more frequently. We found no other differences in demographic parameters such as age, nationality, marital status, number of persons in household, education, health insurance status, or in health care utilization data.

Conclusions

This project is the largest study performed to date which analyzes differences between CLBP and CWP in primary care settings. Our results showed that CWP is a frequent and particularly severe pain syndrome.

Trial registration

German Clinical Trial Register, DRKS00003123.

The reliability of body pain diagrams in the quantitative measurement of pain distribution and location in patients with musculoskeletal pain: a systematic review

OBJECTIVE

The purpose of this study was to perform a systematic review of test-retest, intraexaminer, and interexaminer reliability of measuring pain location and distribution using the body pain diagram.

METHODS

We conducted a systematic review of the literature using a search conducted in Medline, CINAHL, and Nursing and Allied Health from inception to March 1, 2012. Articles were screened and selected by pairs of reviewers using predetermined inclusion criteria. Internal validity was assessed independently by 2 reviewers using a modified version of the QUADAS instrument. Articles with adequate internal validity were included in the best evidence synthesis.

RESULTS

We reviewed 10 studies. Of those, 6 were included in the best evidence synthesis. We found varying levels of evidence that pain location and pain distribution can be measured reliably using the body pain diagram in patients with acute and chronic low back pain with or without radiculopathy. The test-retest reliability for measuring pain distribution ranged from intraclass correlation coefficient of 0.58 to 0.94. Similarly, the test-retest reliability for measuring pain location ranged from kappa (κ) of 0.13 to 0.85. The intraexaminer and interexaminer reliability for measuring pain distribution were intraclass correlation coefficient of 0.99 and 0.99, respectively. The intraexaminer and interexaminer reliability for measuring pain location ranged from κ of 0.77 to 0.88 and 0.61 to 1.00, respectively.

CONCLUSIONS

We found important variations in the test-retest reliability of pain location and distribution across different test-retest scenarios and across body regions. The intraexaminer and interexaminer reliability for the measurement of pain distribution and pain location using the body pain diagram in patients with acute and chronic low back pain with or without radiculopathy are adequate.

Reproducibility of tender point examination in chronic low back pain patients as measured by intrarater and inter-rater reliability and agreement: a validation study

OBJECTIVES

To evaluate the reliability and agreement of digital tender point (TP) examination in chronic low back pain (LBP) patients.

DESIGN

Cross-sectional study.

SETTINGS

Hospital-based validation study.

PARTICIPANTS

Among sick-listed LBP patients referred from general practitioners for low back examination and return-to-work intervention, 43 and 39 patients, respectively (18 women, 46%) entered and completed the study.

MAIN OUTCOME MEASURES

The reliability was estimated by the intraclass correlation coefficient (ICC), and agreement was calculated for up to ±3 TPs. Furthermore, the smallest detectable difference was calculated.

RESULTS

TP examination was performed twice by two consultants in rheumatology and rehabilitation at 20 min intervals and repeated 1 week later. Intrarater reliability in the more and less experienced rater was ICC 0.84 (95% CI 0.69 to 0.98) and 0.72 (95% CI 0.49 to 0.95), respectively. The figures for inter-rater reliability were intermediate between these figures. In more than 70% of the cases, the raters agreed within ±3 TPs in both men and women and between test days. The smallest detectable difference between raters was 5, and for the more and less experienced rater it was 4 and 6 TPs, respectively.

CONCLUSIONS

The reliability of digital TP examination ranged from acceptable to excellent, and agreement was good in both men and women. The smallest detectable differences varied from 4 to 6 TPs. Thus, TP examination in our hands was a reliable but not precise instrument. Digital TP examination may be useful in daily clinical practice, but regular use and training sessions are required to secure quality of testing.

Study protocol: Transition from localized low back pain to chronic widespread pain in general practice: identification of risk factors, preventive factors and key elements for treatment--a cohort study

Background

Chronic localized pain syndromes, especially chronic low back pain (CLBP), are common reasons for consultation in general practice. In some cases chronic localized pain syndromes can appear in combination with chronic widespread pain (CWP). Numerous studies have shown a strong association between CWP and several physical and psychological factors. These studies are population-based cross-sectional and do not allow for assessing chronology. There are very few prospective studies that explore the predictors for the onset of CWP, where the main focus is identifying risk factors for the CWP incidence. Until now there have been no studies focusing on preventive factors keeping patients from developing CWP.

Our aim is to perform a cross sectional study on the epidemiology of CLBP and CWP in general practice and to look for distinctive features regarding resources like resilience, self-efficacy and coping strategies. A subsequent cohort study is designed to identify the risk and protective factors of pain generalization (development of CWP) in primary care for CLBP patients.

Methods/Design

Fifty-nine general practitioners recruit consecutively, during a 5 month period, all patients who are consulting their family doctor because of chronic low back pain (where the pain is lasted for 3 months). Patients are asked to fill out a questionnaire on pain anamnesis, pain-perception, co-morbidities, therapy course, medication, socio demographic data and psychosomatic symptoms. We assess resilience, coping resources, stress management and self-efficacy as potential protective factors for pain generalization. Furthermore, we raise risk factors for pain generalization like anxiety, depression, trauma and critical life events. During a twelve months follow up period a cohort of CLBP patients without CWP will be screened on a regular basis (3 monthly) for pain generalization (outcome: incident CWP).

Discussion

This cohort study will be the largest study which prospectively analyzes predictors for transition from CLBP to CWP in primary care setting. In contrast to the typically researched risk factors, which increase the probability of pain generalization, this study also focus intensively on protective factors, which decrease the probability of pain generalization.

Trial registration

German Clinical Trial Register DRKS00003123