Research objectives and general considerations for pragmatic clinical trials of pain treatments: IMMPACT statement

ABSTRACT

Many questions regarding the clinical management of people experiencing pain and related health policy decision-making may best be answered by pragmatic controlled trials. To generate clinically relevant and widely applicable findings, such trials aim to reproduce elements of routine clinical care or are embedded within clinical workflows. In contrast with traditional efficacy trials, pragmatic trials are intended to address a broader set of external validity questions critical for stakeholders (clinicians, healthcare leaders, policymakers, insurers, and patients) in considering the adoption and use of evidence-based treatments in daily clinical care. This article summarizes methodological considerations for pragmatic trials, mainly concerning methods of fundamental importance to the internal validity of trials. The relationship between these methods and common pragmatic trials methods and goals is considered, recognizing that the resulting trial designs are highly dependent on the specific research question under investigation. The basis of this statement was an Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT) systematic review of methods and a consensus meeting. The meeting was organized by the Analgesic, Anesthetic, and Addiction Clinical Trial Translations, Innovations, Opportunities, and Networks (ACTTION) public-private partnership. The consensus process was informed by expert presentations, panel and consensus discussions, and a preparatory systematic review. In the context of pragmatic trials of pain treatments, we present fundamental considerations for the planning phase of pragmatic trials, including the specification of trial objectives, the selection of adequate designs, and methods to enhance internal validity while maintaining the ability to answer pragmatic research questions.

Moderators and Nonspecific Predictors of Treatment Benefits in a Randomized Trial of Mindfulness-Based Stress Reduction vs Cognitive-Behavioral Therapy vs Usual Care for Chronic Low Back Pain

Both mindfulness-based stress reduction (MBSR) and cognitive-behavioral therapy (CBT) are effective for chronic low back pain (CLBP), but little is known regarding who might benefit more from one than the other. Using data from a randomized trial comparing MBSR, CBT, and usual care (UC) for adults aged 20 to 70 years with CLBP (N = 297), we examined baseline characteristics that moderated treatment effects or were associated with improvement regardless of treatment. Outcomes included 8-week function (modified Roland Disability Questionnaire), pain bothersomeness (0-10 numerical rating scale), and depression (Patient Health Questionnaire-8). There were differences in the effects of CBT versus MBSR on pain based on participant gender (P = .03) and baseline depressive symptoms (P = .01), but the only statistically significant moderator after Bonferroni correction was the nonjudging dimension of mindfulness. Scores on this measure moderated the effects of CBT versus MBSR on both function (P = .001) and pain (P = .04). Pain control beliefs (P <.001) and lower anxiety (P < .001) predicted improvement regardless of treatment. Replication of these findings is needed to guide treatment decision-making for CLBP. TRIAL REGISTRATION: The trial and analysis plan were preregistered in ClinicalTrials.gov (Identifier: NCT01467843). PERSPECTIVE: Although few potential moderators and nonspecific predictors of benefits from CBT or MBSR for CLBP were statistically significant after adjustment for multiple comparisons, these findings suggest potentially fruitful directions for confirmatory research while providing reassurance that patients could reasonably expect to benefit from either treatment.

Yoga Versus Education for Veterans with Chronic Low Back Pain: a Randomized Controlled Trial

BACKGROUND

Yoga is effective for chronic low back pain (cLBP) in civilians but understudied among Veterans.

OBJECTIVE

Determine whether yoga is more effective than an educational book for improving disability and pain among Veterans with cLBP.

DESIGN, SETTING, AND PARTICIPANTS

Veterans diagnosed with cLBP at a VA medical center enrolled in a randomized controlled trial from March to December of 2015.

INTERVENTIONS

Twelve weekly hatha yoga classes or education using The Back Pain Helpbook.

MEASURES

Co-primary outcomes were changes from baseline at 12 weeks in back-related disability on the modified Roland Morris Disability Questionnaire and pain on the Defense & Veterans Pain Rating Scale. Secondary outcomes were global improvement, patient satisfaction, pain medication use, and post-traumatic stress symptoms. An intention-to-treat approach was used in primary analyses.

RESULTS

One hundred twenty Veterans (mean age, 55.5 [SD = 16.9]; 11 [9%] women; mean number of chronic conditions, 5.5) were randomized to yoga (n = 62) and education (n = 58). At 12 weeks, reductions in back-related disability in yoga (mean difference [MD] = - 3.50, 95% CI: - 5.03, - 1.97) were not significantly different than education (MD = - 2.55, 95% CI: - 4.10, - 0.99; between-group difference: - 0.95 [95% CI: - 3.14, 1.23], p = 0.39). For pain, there was no significant difference between yoga (MD = - 1.01, 95% CI: - 1.67, - 0.35) and education (MD = - 0.81, 95% CI: - 1.36, - 0.27; between-group difference: - 0.20, 95% CI: - 1.06, 0.66, p = 0.65). More yoga than education participants reported being very much or extremely improved (39% vs 19%, OR = 3.71, 95% CI: 1.37, 10.02, p = 0.01) and very satisfied with treatment (60% vs 31%, OR = 4.28, 95% CI: 1.70, 10.77, p = 0.002). No differences in pain medication use or post-traumatic stress symptoms were observed at 12 weeks. No serious adverse events were reported in either group.

CONCLUSION

Twelve weekly yoga classes were not more effective than an education intervention for improving pain or disability outcomes among mostly older male Veterans with cLBP and multiple comorbid health conditions.

GOV IDENTIFIER

NCT02224183.

"In Class We Were All One." A Qualitative Exploration of Yoga and Educational Interventions for Predominantly Low-Income and Minority Adults with Chronic Low Back Pain

Introduction: Chronic low back pain (cLBP) can be physically and psychologically debilitating and disproportionally afflicts vulnerable populations. Yoga and education are increasingly common interventions for cLBP yet are understudied in low-income and minority adults. The objective of this qualitative study was to understand the yoga and self-care experience of adults with cLBP from urban, underserved communities who were enrolled in a randomized controlled trial that included these treatments. Methods: We interviewed 26 (18 yoga and 8 education) participants. Interviews were transcribed verbatim and analyzed using thematic analysis with codes developed inductively from data. Results: Participants from both yoga and education groups reported initial apprehension and ambivalence toward their respective intervention. However, physical and psychological benefits were noted, mainly in the form of improved pain self-management. Communal support and camaraderie reported by the yoga group was absent and desired by education participants. Social factors impeding the ability to sustain yoga practice included transportation, access, and cost, whereas education participants described literacy and language challenges and a general lack of motivation to read the book. Conclusion: Yoga and education are viable treatments for adults with cLBP who live in underserved neighborhoods. However, social stigma and socioeconomic barriers may hinder their uptake. Communal support in group-based nonpharmacological treatments is valued and may contribute to participation and clinical outcomes. ClinicalTrials.gov Identifier: NCT01343927.

Osteoporosis identification among previously undiagnosed individuals with vertebral fractures

Because osteoporosis is under-recognized in patients with vertebral fractures, we evaluated characteristics associated with osteoporosis identification. Most patients with vertebral fractures did not receive evaluation or treatment for osteoporosis. Black, younger, and male participants were particularly unlikely to have had recognized osteoporosis, which could increase their risk of negative outcomes.

INTRODUCTION

Vertebral fractures may be identified on imaging but fail to prompt evaluation for osteoporosis. Our objective was to evaluate characteristics associated with clinical osteoporosis recognition in patients who had vertebral fractures detected on their thoracolumbar spine imaging reports.

METHODS

We prospectively identified individuals who received imaging of the lower spine at primary care clinics in 4 large healthcare systems who were eligible for osteoporosis screening and lacked indications of osteoporosis diagnoses or treatments in the prior year. We evaluated characteristics of participants with identified vertebral fractures that were associated with recognition of osteoporosis (diagnosis code in the health record; receipt of bone mineral density scans; and/or prescriptions for anti-osteoporotic medications). We used mixed models to estimate adjusted odds ratios (ORs) and 95% confidence intervals (95% CIs).

RESULTS

A total of 114,005 participants (47% female; mean age 65 (interquartile range: 57-72) years) were evaluated. Of the 8579 (7%) participants with vertebral fractures identified, 3784 (44%) had recognition of osteoporosis within the subsequent year. In adjusted regressions, Black participants (OR (95% CI): 0.74 (0.57, 0.97)), younger participants (age 50-60: 0.48 (0.42, 0.54); age 61-64: 0.70 (0.60, 0.81)), and males (0.39 (0.35, 0.43)) were less likely to have recognized osteoporosis compared to white participants, adults aged 65 + years, or females.

CONCLUSION

Individuals with identified vertebral fractures commonly did not have recognition of osteoporosis within a year, particularly those who were younger, Black, or male. Providers and healthcare systems should consider efforts to improve evaluation of osteoporosis in patients with vertebral fractures.

An experimental study to inform adoption of mindfulness-based stress reduction in chronic low back pain

BACKGROUND

Chronic low back pain is a common and sometimes disabling condition, and mindfulness-based stress reduction is recommended as a first line of therapy. This study tested whether different descriptions of mindfulness training altered based on influential intervention characteristics increased adoption intentions.

METHODS

People with chronic low back pain (n = 452) were randomized to review one of four mindfulness training descriptions in an online survey using a 2 × 2 factorial design. The first factor was evidence strength and quality with relative advantage (ER). The second factor was adaptability, trialability, complexity, and design quality and packaging (AD). Each factor had two levels: a description of standardized mindfulness training that described each intervention characteristic and a patient-centered description emphasizing flexibility and patient testimonials. The primary outcomes were intentions to try mindfulness training and practice mindfulness at home. Using structural equation modeling with a bootstrapped distribution, we tested six mediators, three of which are Theory of Planned Behavior predictors of intention-self-efficacy, norms, and attitudes- and the other three are predictors of adoption-feasibility, appropriateness, and acceptability.

RESULTS

Overall, the mindfulness training descriptions were not associated with an increase in intentions compared to the classic vignette (11/12 p's > 0.05). Most descriptions were unrelated to mediators except the classic ER with patient-centered AD was associated with higher self-efficacy/control and feasibility (p's ≤ 0.05; standardized effect range: 0.111-0.125). Self-efficacy/control (training standardized coefficient: 0.531, home: 0.686), norms (training: 0.303, home: 0.256), and attitudes (training: 0.316, home: 0.293) were all positively associated with intentions to adopt mindfulness training and home practice. Feasibility (training: 0.185; home: 0.293) and acceptability (training: 0.639; home: 0.554) were positively related to intentions to adopt mindfulness training. Appropriateness was related to intentions to adopt home practice (0.187) but not mindfulness training (0.100). None of the indirect effects from experimental group to intentions was significant (all p's > 0.05).

CONCLUSIONS

Self-efficacy/control and acceptability may be key mediators for increasing patient adoption of mindfulness. Because experimental manipulation did not substantially change intentions to adopt mindfulness, the presentation and delivery of MBSR may need to be tailored to the individual patient's needs rather than a specific format for chronic low back pain.

Interest in Mindfulness Training for Chronic Low-Back Pain: Results from a Vignette-driven, Web-based Survey of Patients

Objectives: Mindfulness-based stress reduction (MBSR) has been found effective for improving chronic low-back pain (cLBP). However, little data exist regarding how attractive this technique is to Americans as a therapy for cLBP. Design: Survey of randomly selected persons with cLBP. Settings/Location: Respondents were recruited from Kaiser Permanente Washington and one-time surveys were completed online. Patients: Adults 18-80 years of age with cLBP. Surveys: The study was conducted between December 2019 and August 2020. Outcome measures: The survey described an evidence-based classic MBSR course and then asked respondents about their sociodemographic characteristics, their current back pain, previous back pain treatments, behavioral risk factors for back pain, and four outcomes indicative of intention to engage in MBSR. Results: Four-hundred fifty-seven respondents completed the survey. Respondents were primarily women, white, educated, and with back pain for more than 5 years. About half had previously used a mind-body therapy for their pain. Overall, they reported moderate to high intention to try mindfulness classes and practice at home (median of 5 with 50% of the observations between 4 and 6, and 5.7, 50% of the observations between 4.3 and 6.3, respectively, on a 7-point scale). They reported a willingness to spend a median of 3 h/week learning mindfulness and 3.5 h/week practicing mindfulness techniques (for both outcomes, 50% of the respondents reported between 2 and 5 h). Few patient characteristics predicted intention to engage in MBSR, with no variable predicting all outcomes. The magnitude of the effect associated with significant predictors was small. Conclusion: Classic MBSR appealed to many survey respondents, in that they reported high interest in learning MBSR and intention to practice at home. The amount of time they reported being willing to spend learning MBSR and practicing at home is consistent with the time commitment in the original course.

An Exploratory Randomized Controlled Trial of a 12-Week Yoga Versus Educational Film Program for the Management of Restless Legs Syndrome: Feasibility and Acceptability

Objectives: The primary objectives of this pilot trial were to assess the study feasibility and acceptability of the 12-week yoga and educational film programs for the management of restless legs syndrome (RLS) in preparation for a future randomized controlled trial (RCT). Materials and Methods: This pilot, parallel-arm, randomized feasibility trial was conducted at two sites, Morgantown, WV and Columbus, OH. Yoga group participants attended 75-min Iyengar yoga classes, twice weekly for 4 weeks, then once a week for 8 weeks (16 total classes), and completed a 30-min homework routine on nonclass days. Educational film group participants attended once weekly, 75-min classes (12 total classes), which included information on RLS and other sleep disorders, RLS management including sleep hygiene practices, and complementary therapies. Feasibility and acceptability outcomes included program satisfaction and recruitment, retention, and adherence rates. In addition, participants were asked their preferences regarding three yoga class schedule scenarios for a future study. Attendance, yoga, and treatment logs were collected weekly. Program evaluation and yoga scheduling questionnaires were collected at week 12. Results: Forty-one adults with moderate to severe RLS were randomized to a 12-week yoga (n = 19) or educational film (n = 22) program. Thirty participants (73%) completed the program. Yoga and education group participants attended an average of 13.0 ± 0.84 (81%) and 10.3 ± 0.3 classes (85%), respectively. Participants from both groups indicated satisfaction with the study. All yoga group respondents to the program evaluation reported they would likely (n = 6) or very likely (n = 7) continue yoga practice; 86.7% of education group respondents (13 of 15) indicated that they were likely (n = 7) or very likely (n = 6) to make lasting changes based on what they had learned. The preferred schedule for a future study was a 16-week study with once-weekly yoga classes. Conclusions: The findings of this study suggest that a larger RCT comparing yoga with an educational film group for the management of RLS is feasible. Trial registration: Clinicaltrials.gov: NCT03570515; 02/01/2017.

How to design high quality acupuncture trials-a consensus informed by evidence

An international panel including patients, clinicians, researchers, acupuncture and surgery trialists, statisticians, and experts in clinical epidemiology and methodology have developed new guidance for randomised controlled trials in acupuncture. It addresses the most prevalent and critical concerns of current acupuncture trials and will help funding agencies, trial registers, and journal editors to evaluate the relevance, importance, and quality of submitted trial proposals and completed trials

Theory of Planned Behavior and Mindfulness Intentions in Chronic Low Back Pain

Objectives

Theory of planned of behavior (TPB) constructs have been linked to health behavior intentions. Intentions to try mindfulness-based stress reduction (MBSR), a first-line therapy for chronic low back pain (cLBP), have been less studied. This study aimed to identify which TPB constructs could inform strategies to improve adoption of MBSR.

Methods

People with cLBP (n = 457) read a description of MBSR then completed survey items assessing TPB constructs: attitudes, norms, self-efficacy, perceived control, and intentions to try MBSR training.

Results

Structural equation modeling showed self-efficacy/control (coefficient: 0.564), norms (0.245), and attitudes (0.131) were all positively associated with intentions to try mindfulness trainings.

Conclusions

Results suggest self-efficacy/control may be the most strongly related TPB construct with intentions to try MBSR. Dissemination of MBSR for cLBP could focus on adapting the intervention to increase accessibility and improving available resources to overcome logistical barriers (online formats, drop-in classes).

Supplementary Information

The online version contains supplementary material available at 10.1007/s12671-022-02022-2.

Changes in Pain Self-Efficacy, Coping Skills, and Fear-Avoidance Beliefs in a Randomized Controlled Trial of Yoga, Physical Therapy, and Education for Chronic Low Back Pain

OBJECTIVE

We evaluated exercise interventions for cognitive appraisal of chronic low back pain (cLBP) in an underserved population.

METHODS

We conducted a secondary analysis of the Back to Health Trial, showing yoga to be noninferior to physical therapy (PT) for pain and function outcomes among adults with cLBP (n = 320) recruited from primary care clinics with predominantly low-income patients. Participants were randomized to 12 weeks of yoga, PT, or education. Cognitive appraisal was assessed with the Pain Self-Efficacy Questionnaire (PSEQ), Coping Strategies Questionnaire (CSQ), and Fear-Avoidance Beliefs Questionnaire (FABQ). Using multiple imputation and linear regression, we estimated within- and between-group changes in cognitive appraisal at 12 and 52 weeks, with baseline and the education group as references.

RESULTS

Participants (mean age = 46 years) were majority female (64%) and majority Black (57%), and 54% had an annual household income <$30,000. All three groups showed improvements in PSEQ (range 0-60) at 12 weeks (yoga, mean difference [MD] = 7.0, 95% confidence interval [CI]: 4.9, 9.0; PT, MD = 6.9, 95% CI: 4.7 to 9.1; and education, MD = 3.4, 95% CI: 0.54 to 6.3), with yoga and PT improvements being clinically meaningful. At 12 weeks, improvements in catastrophizing (CSQ, range 0-36) were largest in the yoga and PT groups (MD = -3.0, 95% CI: -4.4 to -1.6; MD = -2.7, 95% CI: -4.2 to -1.2, respectively). Changes in FABQ were small. No statistically significant between-group differences were observed on PSEQ, CSQ, or FABQ at either time point. Many of the changes observed at 12 weeks were sustained at 52 weeks.

CONCLUSION

All three interventions were associated with improvements in self-efficacy and catastrophizing among low-income, racially diverse adults with cLBP.

TRIAL REGISTRATION

ClinicalTrials.gov identifier NCT01343927.

Translation, Cross-Cultural Adaptation, and Psychometric Validation of the English Version of the Postural Awareness Scale

PURPOSE

The Postural Awareness Scale (PAS) was developed among a sample of German speakers to measure self-reported awareness of body posture. The first aim of this study was to conduct an English translation and cross-cultural adaptation of the PAS. The second aim was to assess psychometric properties of the English version of the PAS.

METHODS

Forward and backward translations were conducted. The translated scale was then pretested in a small sample of English-speaking adults (n = 30), followed by cognitive interviews. Finally, consensus of the translated scale was achieved among an expert committee (n = 5), resulting in the Postural Awareness Scale-English Version (PAS-E). Psychometric properties of the PAS-E were investigated among a sample of individuals with chronic pain (n = 301) by evaluating factor structure, reliability, and construct validity. Analyses of variance were conducted to calculate differences in PAS-E scores between specific subgroups (pain conditions, sex, and history of mindfulness practice). Linear regression analyses investigated whether the scores on the PAS-E predicted levels of pain, stress, and mood.

RESULTS

The results obtained from an exploratory factor analysis showed a two-factor solution and were supported by a confirmatory factor analysis. The scale demonstrated good internal consistency and satisfactory construct validity. No significant differences related to sex at birth or pain duration were found.

CONCLUSION

PAS-E demonstrated good psychometric properties, and therefore, can and should be used both for research and clinical practice.

Expected Organizational Costs for Inserting Prevalence Information Into Lumbar Spine Imaging Reports

BACKGROUND

Modifying physician behavior to more closely align with guideline-based care can be challenging. Few effective strategies resulting in appropriate spine-related health care have been reported. The Lumbar Imaging With Reporting of Epidemiology (LIRE) intervention did not result in reductions in spine care but did in opioid prescriptions written.

OBJECTIVES

To estimate organizational resource needs and costs associated with implementing a pragmatic, decision support-type intervention that inserted age- and modality-matched prevalence information for common lumbar spine imaging findings, using site-based resource use data from the LIRE trial.

RESEARCH DESIGN

Time and cost estimation associated with implementing the LIRE intervention in a health organization.

SUBJECTS

Providers and patients assessed in the LIRE trial.

MEASURES

Expected personnel costs required to implement the LIRE intervention.

RESULTS

Annual salaries were converted to daily average per person costs, ranging from $400 to $2,200 per day (base case) for personnel (range: $300-$2,600). Estimated total average cost for implementing LIRE was $5,009 (range: $2,651-$12,020), including conducting pilot testing with providers. Costs associated with a small amount of time for a radiologist (6-12 hours) and imaging-ordering providers (1-8 hours each) account for approximately 75% of the estimated total cost.

CONCLUSIONS

The process of implementing an intervention for lumbar spine imaging reports containing age- and modality-appropriate epidemiological benchmarks for common imaging findings required radiologists, imaging-ordering providers, information technology specialists, and limited testing and monitoring. The LIRE intervention seems to be a relatively low-cost, evidence-based, complementary tool that can be easily integrated into the reporting of spine imaging.

Providing Epidemiological Data in Lumbar Spine Imaging Reports Did Not Affect Subsequent Utilization of Spine Procedures: Secondary Outcomes from a Stepped-Wedge Randomized Controlled Trial

OBJECTIVE

To evaluate the effect of inserting epidemiological information into lumbar spine imaging reports on subsequent nonsurgical and surgical procedures involving the thoracolumbosacral spine and sacroiliac joints.

DESIGN

Analysis of secondary outcomes from the Lumbar Imaging with Reporting of Epidemiology (LIRE) pragmatic stepped-wedge randomized trial.

SETTING

Primary care clinics within four integrated health care systems in the United States.

SUBJECTS

238,886 patients ≥18 years of age who received lumbar diagnostic imaging between 2013 and 2016.

METHODS

Clinics were randomized to receive text containing age- and modality-specific epidemiological benchmarks indicating the prevalence of common spine imaging findings in people without low back pain, inserted into lumbar spine imaging reports (the "LIRE intervention"). The study outcomes were receiving 1) any nonsurgical lumbosacral or sacroiliac spine procedure (lumbosacral epidural steroid injection, facet joint injection, or facet joint radiofrequency ablation; or sacroiliac joint injection) or 2) any surgical procedure involving the lumbar, sacral, or thoracic spine (decompression surgery or spinal fusion or other spine surgery).

RESULTS

The LIRE intervention was not significantly associated with subsequent utilization of nonsurgical lumbosacral or sacroiliac spine procedures (odds ratio [OR] = 1.01, 95% confidence interval [CI] 0.93-1.09; P = 0.79) or any surgical procedure (OR = 0.99, 95 CI 0.91-1.07; P = 0.74) involving the lumbar, sacral, or thoracic spine. The intervention was also not significantly associated with any individual spine procedure.

CONCLUSIONS

Inserting epidemiological text into spine imaging reports had no effect on nonsurgical or surgical procedure utilization among patients receiving lumbar diagnostic imaging.

Acupuncture Intervention Protocol: Consensus Process for a Pragmatic Randomized Controlled Trial of Acupuncture for Management of Chronic Low Back Pain in Older Adults: An NIH HEAL Initiative Funded Project

Objective

The aim of this article is to describe the consensus process used to develop an acupuncture intervention protocol for an NIH-funded pragmatic randomized controlled trial (PRCT) of acupuncture for the management of chronic low back (cLBP) in older adults (BackInAction).

Background

CLBP is among leading causes of disability worldwide: almost 33% of US adults 65 and older experience LBP. Acupuncture is effective for cLBP but there is no specific data on older adults. The National Institutes for Health (NIH) funded a PRCT of acupuncture needling for this population. An essential trial milestone was development of a consensus intervention protocol.

Methods

An Acupuncture Advisory Panel (AAP) was formed with nine members: two physician-acupuncturists, six licensed acupuncturists representing diverse work backgrounds, and an acupuncture researcher. We used a modified Delphi process that included provision of acupuncture trial data, survey data describing how each expert treats cLBP, three conference calls, and between-call email discussion.

Results

Lively and professional discussions led to a consensus intervention protocol for the BackInAction trial that included steps/staging of care, recommendations for parameters of care session length, number of needle insertion sites, insertion depths, needle retention times, recommended types of needles, both local and distal areas of the body to be treated, acupuncture point options, auricular point options, self-care options, and minimum number of sessions considered ideal.

Conclusion

Using a modified Delphi process, an expert AAP created a consensus intervention protocol for the PRCT of acupuncture needling for cLBP in patients 65 and older.

The Intersection of Dissemination Research and Acupuncture: Applications for Chronic Low Back Pain

Dissemination research is the study of distributing information and intervention materials to a specific clinical practice or public health audience. Acupuncture, a healthcare practice involving the stimulation of certain body points, often with thin needles, is considered an evidence-based treatment for low back pain (LBP), but is underutilized in the United States.

Body: We will use the example of acupuncture for LBP to identify opportunities to leverage dissemination research to increase utilization of acupuncture. Deficits in the awareness or knowledge of acupuncture may limit its adoption by patients and other stakeholders. Thus, we summarize methods to gather data on stakeholder awareness and knowledge of acupuncture for LBP, i.e., audience research. Engaging multiple stakeholder audiences (e.g., health system leaders, primary care providers, patients), is needed to generate knowledge on promising dissemination strategies for each audience. Audience segmentation is important for identifying population subgroups for whom adoption of acupuncture may require a more intensive or tailored dissemination strategy. To illustrate potential audience ‘segments’, our research discussion focused on developing dissemination strategies by age (i.e., older adults – those age 65 years or older, and younger adults – those under age 65 ). This decision was prompted by Medicare’s recent policy covering acupuncture for chronic LBP. We leverage current knowledge of barriers and facilitators of acupuncture use to discuss how further tailoring of dissemination strategies might optimize adoption of acupuncture in both groups of adults. Experimental study designs could then be used to compare the effectiveness of such strategies to increase awareness, knowledge, or adoption of acupuncture.

Conclusions: Conducting dissemination research may improve awareness and knowledge of acupuncture, and ultimately the adoption of acupuncture in biomedical settings. We anticipate that the concepts highlighted in this manuscript will also be helpful for those disseminating information about other complementary and integrative health approaches.

Changes in Perceived Stress After Yoga, Physical Therapy, and Education Interventions for Chronic Low Back Pain: A Secondary Analysis of a Randomized Controlled Trial

OBJECTIVE

Perceived stress and musculoskeletal pain are common, especially in low-income populations. Studies evaluating treatments to reduce stress in patients with chronic pain are lacking. We aimed to quantify the effect of two evidence-based interventions for chronic low back pain (cLBP), yoga and physical therapy (PT), on perceived stress in adults with cLBP.

METHODS

We used data from an assessor-blinded, parallel-group randomized controlled trial, which recruited predominantly low-income and racially diverse adults with cLBP. Participants (N = 320) were randomly assigned to 12 weeks of yoga, PT, or back pain education. We compared changes in the 10-item Perceived Stress Scale (PSS-10) from baseline to 12- and 52-week follow-up among yoga and PT participants with those receiving education. Subanalyses were conducted for participants with elevated pre-intervention perceived stress (PSS-10 score ≥17). We conducted sensitivity analyses using various imputation methods to account for potential biases in our estimates due to missing data.

RESULTS

Among 248 participants (mean age = 46.4 years, 80% nonwhite) completing all three surveys, yoga and PT showed greater reductions in PSS-10 scores compared with education at 12 weeks (mean between-group difference = -2.6, 95% confidence interval [CI] = -4.5 to -0.66, and mean between-group difference = -2.4, 95% CI = -4.4 to -0.48, respectively). This effect was stronger among participants with elevated pre-intervention perceived stress. Between-group effects had attenuated by 52 weeks. Results were similar in sensitivity analyses.

CONCLUSIONS

Yoga and PT were more effective than back pain education for reducing perceived stress among low-income adults with cLBP.

Which Chronic Low Back Pain Patients Respond Favorably to Yoga, Physical Therapy, and a Self-care Book? Responder Analyses from a Randomized Controlled Trial

PURPOSE

To identify baseline characteristics of adults with chronic low back pain (cLBP) that predict response (i.e., a clinically important improvement) and/or modify treatment effect across three nonpharmacologic interventions.

DESIGN

Secondary analysis of a randomized controlled trial.

SETTING

Academic safety net hospital and seven federally qualified community health centers.

SUBJECTS

Adults with cLBP (N = 299).

METHODS

We report patient characteristics that were predictors of response and/or modified treatment effect across three 12-week treatments: yoga, physical therapy [PT], and a self-care book. Using preselected characteristics, we used logistic regression to identify predictors of "response," defined as a ≥30% improvement in the Roland Morris Disability Questionnaire. Then, using "response" as our outcome, we identified baseline characteristics that were treatment effect modifiers by testing for statistical interaction (P < 0.05) across two comparisons: 1) yoga-or-PT vs self-care and 2) yoga vs PT.

RESULTS

Overall, 39% (116/299) of participants were responders, with more responders in the yoga-or-PT group (42%) than the self-care (23%) group. There was no difference in proportion responding to yoga (48%) vs PT (37%, odds ratio [OR] = 1.5, 95% confidence interval = 0.88 - 2.6). Predictors of response included having more than a high school education, a higher income, employment, few depressive symptoms, lower perceived stress, few work-related fear avoidance beliefs, high pain self-efficacy, and being a nonsmoker. Effect modifiers included use of pain medication and fear avoidance beliefs related to physical activity (both P = 0.02 for interaction). When comparing yoga or PT with self-care, a greater proportion were responders among those using pain meds (OR = 5.3), which differed from those not taking pain meds (OR = 0.94) at baseline. We also found greater treatment response among those with lower (OR = 7.0), but not high (OR = 1.3), fear avoidance beliefs around physical activity.

CONCLUSIONS

Our findings revealed important subgroups for whom referral to yoga or PT may improve cLBP outcomes.

Do the effects of acupuncture vary between acupuncturists? Analysis of the Acupuncture Trialists' Collaboration individual patient data meta-analysis

OBJECTIVES

The degree to which the effects of acupuncture treatment vary between acupuncturists is unknown. We used a large individual patient dataset of trials of acupuncture for chronic pain to assess practitioner heterogeneity.

METHODS

Individual patient data linked to identifiable acupuncturists were drawn from a dataset of 39 high-quality trials of acupuncture, where the comparators were either sham acupuncture or non-acupuncture controls, such as standard care or waitlist. Heterogeneity among acupuncturists was assessed by meta-analysis.

RESULTS

A total of 1206 acupuncturists in 13 trials were included. Statistically significant heterogeneity was found in trials with sham-control groups (p < 0.0001) and non-acupuncture control groups (p <0.0001). However, the degree of heterogeneity was very small, with the observed distribution of treatment effects virtually overlapping that expected by chance. For instance, for non-acupuncture-controlled trials, the proportion of acupuncturists with effect sizes half a standard deviation greater or less than average was expected to be 34%, but was observed to be 37%. A limitation is that the trials included a relatively limited range of acupuncturists, mainly physician-acupuncturists.

DISCUSSION

Although differences in effects between acupuncturists were greater than expected by chance, the degree of variation was small. This suggests that most chronic pain patients in clinical practice would have similar results to those reported in high-quality trials; comparably, we did not find evidence to suggest that greater standardization of acupuncture practice would improve outcomes. Further research needs to be conducted exploring variability using a sample of acupuncturists with a broader range of practice styles, training and experience.

The Effect of Including Benchmark Prevalence Data of Common Imaging Findings in Spine Image Reports on Health Care Utilization Among Adults Undergoing Spine Imaging: A Stepped-Wedge Randomized Clinical Trial

IMPORTANCE

Lumbar spine imaging frequently reveals findings that may seem alarming but are likely unrelated to pain. Prior work has suggested that inserting data on the prevalence of imaging findings among asymptomatic individuals into spine imaging reports may reduce unnecessary subsequent interventions.

OBJECTIVE

To evaluate the impact of including benchmark prevalence data in routine spinal imaging reports on subsequent spine-related health care utilization and opioid prescriptions.

DESIGN, SETTING, AND PARTICIPANTS

This stepped-wedge, pragmatic randomized clinical trial included 250 401 adult participants receiving care from 98 primary care clinics at 4 large health systems in the United States. Participants had imaging of their backs between October 2013 and September 2016 without having had spine imaging in the prior year. Data analysis was conducted from November 2018 to October 2019.

INTERVENTIONS

Either standard lumbar spine imaging reports (control group) or reports containing age-appropriate prevalence data for common imaging findings in individuals without back pain (intervention group).

MAIN OUTCOMES AND MEASURES

Health care utilization was measured in spine-related relative value units (RVUs) within 365 days of index imaging. The number of subsequent opioid prescriptions written by a primary care clinician was a secondary outcome, and prespecified subgroup analyses examined results by imaging modality.

RESULTS

We enrolled 250 401 participants (of whom 238 886 [95.4%] met eligibility for this analysis, with 137 373 [57.5%] women and 105 497 [44.2%] aged >60 years) from 3278 primary care clinicians. A total of 117 455 patients (49.2%) were randomized to the control group, and 121 431 patients (50.8%) were randomized to the intervention group. There was no significant difference in cumulative spine-related RVUs comparing intervention and control conditions through 365 days. The adjusted median (interquartile range) RVU for the control group was 3.56 (2.71-5.12) compared with 3.53 (2.68-5.08) for the intervention group (difference, -0.7%; 95% CI, -2.9% to 1.5%; P = .54). Rates of subsequent RVUs did not differ between groups by specific clinical findings in the report but did differ by type of index imaging (eg, computed tomography: difference, -29.3%; 95% CI, -42.1% to -13.5%; magnetic resonance imaging: difference, -3.4%; 95% CI, -8.3% to 1.8%). We observed a small but significant decrease in the likelihood of opioid prescribing from a study clinician within 1 year of the intervention (odds ratio, 0.95; 95% CI, 0.91 to 1.00; P = .04).

CONCLUSIONS AND RELEVANCE

In this study, inserting benchmark prevalence information in lumbar spine imaging reports did not decrease subsequent spine-related RVUs but did reduce subsequent opioid prescriptions. The intervention text is simple, inexpensive, and easily implemented.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT02015455.

Identifying patients with chronic pain who respond to acupuncture: results from an individual patient data meta-analysis

BACKGROUND

In a recent individual patient data meta-analysis, acupuncture was found to be superior to sham and non-sham controls in patients with chronic pain. It has been suggested that a subgroup of patients has an exceptional response to acupuncture. We hypothesized the presence of exceptional acupuncture responders would lead to a different distribution of pain scores in acupuncture versus control groups, with the former being skewed to the right.

METHODS

This individual patient data meta-analysis included 39 high-quality randomized trials of acupuncture for chronic headache, migraine, osteoarthritis, low back pain, neck pain and shoulder pain published before December 2015 (n = 20,827). In all, 25 involved sham acupuncture controls (n = 7097) and 25 non-acupuncture controls (n = 16,041). We analyzed the distribution of change scores and calculated the difference in the skewness statistic-which assesses asymmetry in the data distribution-between acupuncture and either sham or non-acupuncture control groups. We then entered the difference in skewness along with standard error into a meta-analysis.

FINDINGS

Control groups were more right-skewed than acupuncture groups, although this difference was very small. The difference in skew was 0.124 for non-acupuncture-controlled trials (p = 0.047) and 0.141 for sham-controlled trials (p = 0.029). In a pre-specified sensitivity analysis excluding three trials with outlying results known a priori, the difference in skew between acupuncture and sham was no longer statistically significant (p = 0.2).

CONCLUSION

We did not find evidence to support the notion that there are exceptional acupuncture responders. The challenge remains to identify features of chronic pain patients that can be used to distinguish those that have a good response to acupuncture treatment.

The Benefits of T'ai Chi for Older Adults with Chronic Back Pain: A Qualitative Study

Objective: To determine the perceived benefits of t'ai chi in older adults with chronic low-back pain (cLBP). Design: A qualitative analysis from a randomized controlled feasibility trial. Subjects: Eighteen participants (65+ years old) with cLBP of at least moderate intensity. Intervention: A 36-week intervention beginning with twice weekly classes for 12 weeks, weekly classes for 6 weeks, biweekly classes for 6 weeks, and monthly classes for 12 weeks. Participants were asked to practice at home on nonclass days and videos were provided to assist in that process. Outcome Measures: Participants in the focus groups were asked to provide feedback on their experiences with the study as well as the benefits of their t'ai chi practice. We used demographic and class attendance data to describe the sample. Results: Regarding the benefits of t'ai chi practice, five major themes were identified: functional benefits, pain reduction/pain relief, psychospiritual benefits, the importance of social support in learning t'ai chi, and the integration of t'ai chi into daily activities. The most common functional benefits were improvements in balance, flexibility, leg strength, and posture. Some reported pain reduction or pain relief, but others did not. Increased relaxation, mindfulness, and a sense of connectedness were subthemes that emerged from psychospiritual benefits. Social support benefits included motivation to attend class and group support while learning a new skill. Finally, improved body awareness allowed participants to integrate t'ai chi skills into their daily activities. Conclusions: This qualitative analysis demonstrates the multifaceted benefits of t'ai chi for older adults living with cLBP.

Adaptation and Implementation of the STarT Back Risk Stratification Strategy in a US Health Care Organization: A Process Evaluation

OBJECTIVE

To support implementation of effective treatments for back pain that can be delivered to a range of people, we summarize learnings from our process evaluation of the MATCH trial's implementation of an adaptation of the STarT Back risk-stratified care model.

DESIGN

Our logic model-driven evaluation focused primarily on qualitative data sources.

SETTING

This study took place in a US-based health care delivery system that had adapted and implemented the STarT Back stratified care approach. This was the first formal test of the strategy in a US setting.

METHODS

Data collection included observation of implementation activities, staff/provider interviews, and post-training evaluation questionnaires. Data were analyzed using thematic analysis of qualitative data and descriptive statistics for questionnaire data.

RESULTS

We found that both primary care teams and physical therapists at intervention clinics gave the training high scores on evaluation questionnaires and reported in the interviews that they found the training engaging and useful. However, there was significant variation in the extent to which the risk stratification strategy was incorporated into care. Some primary care providers reported that the intervention changed their conversations with patients and increased their confidence in working with patients with back pain. Providers using the STarT Back tool did not change referral rates for recommended matched treatments.

CONCLUSIONS

These insights provide guidance for future efforts to adapt and implement the STarT Back strategy and other complex practice change interventions. They emphasize the need for primary care-based interventions to minimize complexity and the need for ongoing monitoring and feedback.

The Trials and Tribulations of Selecting Comparison Groups in Randomized Trials of Nonpharmacological Complementary and Integrative Health Interventions

Editor's Note: For over two decades, JACM Editorial Board member Karen Sherman, PhD has been among the most respected clinical trialists in complementary and integrative health research. The epidemiologist and Senior Researcher at Kaiser Permanente Washington Health Research Institute has focused on pain conditions and has led or been part of teams exploring the roles of such therapies as yoga, acupuncture, mind-body and manual therapies. In this Invited Commentary, Sherman shares wisdom gleaned from the process: trial designs, principles for selecting controls, benefits and liabilities of placebo and sham controls, attention controls, usual care controls, and more. She also discusses the effects of comparison groups on sample sizes, comparison groups for mechanistic studies, and other comparison groups' considerations. This commentary should prove a useful primer wherever research methods in complementary and integrative health are taught. We are pleased to offer it here through JACM. -John Weeks, Editor-in-Chief, JACM (johnweeks-integrator.com).

T'ai Chi for Chronic Low Back Pain in Older Adults: A Feasibility Trial

Objectives: T'ai chi (TC) has been found effective for improving chronic low back pain (cLBP). However, such studies did not include adults over 65 years of age. This study was designed to evaluate the feasibility and acceptability of TC in this population compared with Health Education (HE) and with Usual Care (UC). Design: Feasibility randomized controlled trial. Settings/Location: Participants were recruited from Kaiser Permanente Washington and classes took place in a Kaiser facility. Patients: Adults 65 years of age and older with cLBP. Interventions: Twenty-eight participants were randomized to 12 weeks of TC followed by a 24-week tapered TC program, 12 were assigned to a 12-week HE intervention and 17 were assigned to UC only. Outcome Measures: Feasibility and acceptability were determined by recruitment, retention and 12-, 26-, and 52-week follow-up rates, instructor adherence to protocol, class attendance, TC home practice, class satisfaction, and adverse events. Results: Fifty-seven participants were enrolled in two cohorts of 28 and 29 during two 4-month recruitment periods. Questionnaire follow-up completion rates ranged between 88% and 93%. Two major class protocol deviations were noted in TC and none in HE. Sixty-two percent of TC participants versus 50% of HE participants attended at least 70% of the classes during the 12-week initial intervention period. Weekly rates of TC home practice were high among class attendees (median of 4.2 days) at 12 weeks, with fewer people practicing at 26 and 52 weeks. By 52 weeks, 70% of TC participants reported practicing the week before, with a median of 3 days per week and 15 min/session. TC participants rated the helpfulness of their classes significantly higher than did HE participants, but the groups were similarly likely to recommend the classes. Conclusion: The TC intervention is feasible in this population, while the HE group requires modifications in delivery.

Yoga, Physical Therapy, and Back Pain Education for Sleep Quality in Low-Income Racially Diverse Adults with Chronic Low Back Pain: a Secondary Analysis of a Randomized Controlled Trial

BACKGROUND

Poor sleep is common among adults with chronic low back pain (cLBP), but the influence of cLBP treatments, such as yoga and physical therapy (PT), on sleep quality is under studied.

OBJECTIVE

Evaluate the effectiveness of yoga and PT for improving sleep quality in adults with cLBP.

DESIGN

Secondary analysis of a randomized controlled trial.

SETTING

Academic safety-net hospital and 7 affiliated community health centers.

PARTICIPANTS

A total of 320 adults with cLBP.

INTERVENTION

Twelve weekly yoga classes, 1-on-1 PT sessions, or an educational book.

MAIN MEASURES

Sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI) global score (0-21) at baseline, 12 weeks, and 52 weeks. Additionally, we also evaluated how the proportion of participants who achieved a clinically meaningful improvement in sleep quality (> 3-point reduction in PSQI) at 12 weeks varied by changes in pain and physical function at 6 weeks.

KEY RESULTS

Among participants (mean age = 46.0, 64% female, 82% non-white), nearly all (92%) reported poor sleep quality (PSQI > 5) at baseline. At 12 weeks, modest improvements in sleep quality were observed among the yoga (PSQI mean difference [MD] = - 1.19, 95% confidence interval [CI] - 1.82, - 0.55) and PT (PSQI MD = - 0.91, 95% CI - 1.61, - 0.20) groups. Participants who reported a ≥ 30% improvement in pain or physical function at 6 weeks, compared with those who improved < 10%, were more likely to be a sleep quality responder at 12 weeks (odds ratio [OR] = 3.51, 95% CI 1.73, 7.11 and OR = 2.16, 95% CI 1.18, 3.95, respectively). Results were similar at 52 weeks.

CONCLUSION

In a sample of adults with cLBP, virtually all with poor sleep quality prior to intervention, modest but statistically significant improvements in sleep quality were observed with both yoga and PT. Irrespective of treatment, clinically important sleep improvements at the end of the intervention were associated with mid-intervention pain and physical function improvements.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT01343927.

Impact of Opioid Dose Reduction and Risk Mitigation Initiatives on Chronic Opioid Therapy Patients at Higher Risk for Opioid-Related Adverse Outcomes

Objective

We aimed to determine if opioid risk reduction initiatives including dose reduction and risk mitigation strategies for chronic noncancer pain patients receiving chronic opioid therapy (COT) had a differential impact on average daily opioid doses of COT patients at higher risk for opioid-related adverse outcomes compared with lower-risk patients.

Design

Interrupted time series.

Setting

Group Health Cooperative (GH), a health care delivery system and insurance within Washington State, between 2006 and 2014.

Population

GH enrollees on COT defined as receiving a supply of 70 or more days of opioids within 90 days using electronic pharmacy data for filled prescriptions.

Methods

We compared the average daily morphine equivalent doses (MED) of COT patients with and without each of the following higher-risk characteristics: mental disorders, substance use disorders, sedative use, and male gender.

Results

In all four pairwise comparisons, the higher-risk subgroup had a higher average daily MED than the lower-risk subgroup across the study period. Adjusted for covariates, modest differences in the annual rate of reduction in average daily MED were noted between higher- and lower-risk subgroups in three pairwise comparisons: those with mental disorders vs without (-8.2 mg/y vs -5.2 mg/y, P = 0.005), with sedative use vs without (-9.2 mg/y vs -5.8 mg/y, P = 0.004); mg), in men vs women (-8.8 mg/y vs -5.9 mg/y, P = 0.01).

Conclusion

Using clinical policy initiatives in a health care system, dose reductions were achieved among COT patients at higher risk for opioid-related adverse outcomes that were at least as large as those among lower-risk patients.

Using Natural Language Processing of Free-Text Radiology Reports to Identify Type 1 Modic Endplate Changes

Electronic medical record (EMR) systems provide easy access to radiology reports and offer great potential to support quality improvement efforts and clinical research. Harnessing the full potential of the EMR requires scalable approaches such as natural language processing (NLP) to convert text into variables used for evaluation or analysis. Our goal was to determine the feasibility of using NLP to identify patients with Type 1 Modic endplate changes using clinical reports of magnetic resonance (MR) imaging examinations of the spine. Identifying patients with Type 1 Modic change who may be eligible for clinical trials is important as these findings may be important targets for intervention. Four annotators identified all reports that contained Type 1 Modic change, using N = 458 randomly selected lumbar spine MR reports. We then implemented a rule-based NLP algorithm in Java using regular expressions. The prevalence of Type 1 Modic change in the annotated dataset was 10%. Results were recall (sensitivity) 35/50 = 0.70 (95% confidence interval (C.I.) 0.52-0.82), specificity 404/408 = 0.99 (0.97-1.0), precision (positive predictive value) 35/39 = 0.90 (0.75-0.97), negative predictive value 404/419 = 0.96 (0.94-0.98), and F1-score 0.79 (0.43-1.0). Our evaluation shows the efficacy of rule-based NLP approach for identifying patients with Type 1 Modic change if the emphasis is on identifying only relevant cases with low concern regarding false negatives. As expected, our results show that specificity is higher than recall. This is due to the inherent difficulty of eliciting all possible keywords given the enormous variability of lumbar spine reporting, which decreases recall, while availability of good negation algorithms improves specificity.

Design of a Multidisciplinary Training Program in Complementary and Integrative Health Clinical Research: Building Research Across Interdisciplinary Gaps

Despite wide use by the public, limited evidence is available for many complementary and integrative health (CIH) practices. Thus, clinical researchers knowledgeable about CIH disciplines are necessary to study the efficacy and effectiveness of CIH practices to benefit the public health. To partially address the need for clinical researchers versed in CIH, the authors of this study report the design of an interprofessional clinical research training program focused on CIH, the Building Research across Interdisciplinary Gaps (BRIDG) program, supported by a 5-year T90/R90 grant from the National Center for Complementary and Integrative Health. The T90-supported arm of the program trains doctoral-level CIH providers in clinical research at the research-intensive University of Washington. The R90-supported arm of the program trains researchers with conventional backgrounds in the practices of CIH at the clinic-intensive National University of Natural Medicine. The "Translational Science Spectrum" provides a common conceptual framework for both programs. Specific program elements include: individualized didactic training in clinical research and CIH disciplines; placement with clinical research mentors; placement with clinical mentors in CIH disciplines; shared and independent research project development; and interdisciplinary experiences through seminars and retreats. Program evaluation includes annual completion of the Clinical Research Appraisal Inventory (CRAI), which queries confidence in research skills and methods and periodic evaluation of training elements using the Supplemental Kellogg Logic-World Health Organization model, which emphasizes relevance, adequacy, efficiency, effectiveness, process, impact, equity, and sustainability. The BRIDG program exemplifies a new standard in interprofessional clinical research training, made possible through strong collaboration between disparate research- and clinically intensive institutions.

Comparison of Natural Language Processing Rules-based and Machine-learning Systems to Identify Lumbar Spine Imaging Findings Related to Low Back Pain

RATIONALE AND OBJECTIVES

To evaluate a natural language processing (NLP) system built with open-source tools for identification of lumbar spine imaging findings related to low back pain on magnetic resonance and x-ray radiology reports from four health systems.

MATERIALS AND METHODS

We used a limited data set (de-identified except for dates) sampled from lumbar spine imaging reports of a prospectively assembled cohort of adults. From N = 178,333 reports, we randomly selected N = 871 to form a reference-standard dataset, consisting of N = 413 x-ray reports and N = 458 MR reports. Using standardized criteria, four spine experts annotated the presence of 26 findings, where 71 reports were annotated by all four experts and 800 were each annotated by two experts. We calculated inter-rater agreement and finding prevalence from annotated data. We randomly split the annotated data into development (80%) and testing (20%) sets. We developed an NLP system from both rule-based and machine-learned models. We validated the system using accuracy metrics such as sensitivity, specificity, and area under the receiver operating characteristic curve (AUC).

RESULTS

The multirater annotated dataset achieved inter-rater agreement of Cohen's kappa > 0.60 (substantial agreement) for 25 of 26 findings, with finding prevalence ranging from 3% to 89%. In the testing sample, rule-based and machine-learned predictions both had comparable average specificity (0.97 and 0.95, respectively). The machine-learned approach had a higher average sensitivity (0.94, compared to 0.83 for rules-based), and a higher overall AUC (0.98, compared to 0.90 for rules-based).

CONCLUSIONS

Our NLP system performed well in identifying the 26 lumbar spine findings, as benchmarked by reference-standard annotation by medical experts. Machine-learned models provided substantial gains in model sensitivity with slight loss of specificity, and overall higher AUC.

Impact of initiatives to reduce prescription opioid risks on medically attended injuries in people using chronic opioid therapy

PURPOSE

The purpose of the study is to determine whether initiatives to improve the safety of opioid prescribing decreased injuries in people using chronic opioid therapy (COT).

METHODS

We conducted an interrupted time series analysis using data from Group Health (GH), an integrated health care delivery system in the United States. In 2007, GH implemented initiatives which substantially reduced daily opioid dose and increased patient monitoring. Among GH members age 18 or older receiving COT between 2006 and 2014, we compared injury rates for patients in GH's integrated group practice (IGP; exposed to the initiatives) vs patients cared for by contracted providers (not exposed). Injuries were identified using a validated algorithm. We calculated injury incidence during the baseline (preintervention) period from 2006 to 2007; the dose reduction period, 2008 to 2010; and the risk stratification and monitoring period, 2010 to 2014. Using modified Poisson regression, we estimated adjusted relative risks (RRs) representing the relative change per year in injury rates.

RESULTS

Among 21 853 people receiving COT in the IGP and 8260 in contracted care, there were 2679 injuries during follow-up. The baseline injury rate was 1.0% per calendar quarter in the IGP and 0.9% in contracted care. Risk reduction initiatives did not decrease injury rates: Within the IGP, the RR in the dose reduction period was 1.01 (95% CI, 0.95-1.07) and in the risk stratification and monitoring period, 0.99 (95% CI, 0.95-1.04). Injury trends did not differ between the two care settings.

CONCLUSIONS

Risk reduction initiatives did not decrease injuries in people using COT.

Impact of Chronic Opioid Therapy Risk Reduction Initiatives on Opioid Overdose

We assessed the effects of opioid dose and risk reduction initiatives on opioid overdose rates among patients on chronic opioid therapy (COT). Using an interrupted time series design, we compared trends in overdose rates. We compared patients on COT in settings that implemented a COT dose reduction initiative and then a COT risk stratification/monitoring initiative to similar patients on COT from control settings. From 2006 to 2014, 31,142 patients on COT (22,673 intervention, 8,469 control) experienced 311 fatal or nonfatal opioid overdoses. In primary analyses, changes in opioid overdose rates among patients on COT did not differ significantly between intervention and control settings with the implementation of either dose reduction or risk stratification/monitoring. In planned secondary analyses, overdose rates decreased significantly (17% per year) during the dose reduction initiative among patients on COT in intervention settings (relative annual change, 0.83; 95% confidence interval, 0.70-0.99), but not in control settings (0.98. 95% confidence interval, 0.70-1.39). We conclude that overdose rates among patients on COT were not decreased by risk stratification and monitoring initiatives. Results were inconsistent for COT dose reduction, with no significant difference between intervention and control settings (primary hypothesis test), but a significant decrease in overdose rates within the intervention setting during dose reduction (secondary hypothesis test). PERSPECTIVE: Risk stratification/monitoring interventions among patients on COT did not decrease opioid overdose rates. The effects of COT dose reduction on opioid overdose rates were inconsistent. Greater decreases in COT dose, a larger control group, or both may have been needed to identify conclusive reductions in opioid overdose rates.

Patient Perspectives on Communication with Primary Care Physicians about Chronic Low Back Pain

OBJECTIVES

Chronic low back pain (CLBP) is a common health problem with challenges for providing satisfactory care. This study was undertaken to identify opportunities to improve key aspects of physicians' communications with CLBP-affected patients.

METHODS

A series of 3 focus groups, each with 7 to 11 patients with CLBP, were recruited from primary care settings and grouped by risk level of reduced function resulting from back pain, to elicit perspectives about interactions with their primary care physicians. Analysis of focus group transcripts used an iterative process based on a thematic approach and a priori concepts.

RESULTS

A total of 28 patients participated in the focus groups. Patient comments about communicating with physicians around CLBP fit into themes of listening and empathy, validating pain experiences, conducting effective CLBP assessment, providing clear diagnosis and information, and collaboratively working on treatment. Patients shared that physicians can foster positive interactions with CLBP-affected patients by sharing personal experiences of chronic pain, being truthful about not having all the answers and being clear about how patients can benefit from referrals, reviewing the patient's previous treatments before beginning conversations about treatment options, providing follow-up instructions, giving patients a diagnosis beyond "chronic pain," and explaining the role of imaging in their care.

CONCLUSION

This study provides specific steps that physicians in the US can take to improve physician-patient interactions during primary care visits pertaining to CLBP. The findings could inform physician training, development of educational materials for patients, and future research.

Predictors of Persistent Disability and Back Pain in Older Adults with a New Episode of Care for Back Pain

Objective

To identify predictors of persistent disability and back pain in older adults.

Design

Prospective cohort study.

Setting

Back pain outcomes using longitudinal data registry.

Subjects

Five thousand two hundred twenty adults age 65 years and older with a new primary care visit for back pain.

Methods

Baseline measurements included: demographics, health, and back pain characteristics. We abstracted imaging findings from 348 radiology reports. The primary outcomes were the Roland-Morris Disability Questionnaire (RMDQ) and back pain intensity. We defined persistent disability as RMDQ of 4/24 or higher at both six and 12 months and persistent back pain as pain 3/10 or higher at both six and 12 months.

Results

There were 2,498 of 4,143 (60.3%) participants with persistent disability, and 2,099 of 4,144 (50.7%) had persistent back pain. Adjusted analyses showed the following characteristics most strongly predictive of persistent disability and persistent back pain: sex, race, worse baseline clinical characteristics of back pain, leg pain, back-related disability and duration of symptoms, smoking, anxiety symptoms, depressive symptoms, a history of falls, greater number of comorbidities, knee osteoarthritis, wide-spread pain syndromes, and an index diagnosis of lumbar spinal stenosis. Within the imaging data subset, central spinal stenosis was not associated with disability or pain.

Conclusion

We found that many predictors in older adults were similar to those for younger populations.

Acupuncture for Chronic Pain: Update of an Individual Patient Data Meta-Analysis

Despite wide use in clinical practice, acupuncture remains a controversial treatment for chronic pain. Our objective was to update an individual patient data meta-analysis to determine the effect size of acupuncture for 4 chronic pain conditions. We searched MEDLINE and the Cochrane Central Registry of Controlled Trials randomized trials published up until December 31, 2015. We included randomized trials of acupuncture needling versus either sham acupuncture or no acupuncture control for nonspecific musculoskeletal pain, osteoarthritis, chronic headache, or shoulder pain. Trials were only included if allocation concealment was unambiguously determined to be adequate. Raw data were obtained from study authors and entered into an individual patient data meta-analysis. The main outcome measures were pain and function. An additional 13 trials were identified, with data received for a total of 20,827 patients from 39 trials. Acupuncture was superior to sham as well as no acupuncture control for each pain condition (all P < .001) with differences between groups close to .5 SDs compared with no acupuncture control and close to .2 SDs compared with sham. We also found clear evidence that the effects of acupuncture persist over time with only a small decrease, approximately 15%, in treatment effect at 1 year. In secondary analyses, we found no obvious association between trial outcome and characteristics of acupuncture treatment, but effect sizes of acupuncture were associated with the type of control group, with smaller effects sizes for sham controlled trials that used a penetrating needle for sham, and for trials that had high intensity of intervention in the control arm. We conclude that acupuncture is effective for the treatment of chronic pain, with treatment effects persisting over time. Although factors in addition to the specific effects of needling at correct acupuncture point locations are important contributors to the treatment effect, decreases in pain after acupuncture cannot be explained solely in terms of placebo effects. Variations in the effect size of acupuncture in different trials are driven predominantly by differences in treatments received by the control group rather than by differences in the characteristics of acupuncture treatment.

PERSPECTIVE

Acupuncture is effective for the treatment of chronic musculoskeletal, headache, and osteoarthritis pain. Treatment effects of acupuncture persist over time and cannot be explained solely in terms of placebo effects. Referral for a course of acupuncture treatment is a reasonable option for a patient with chronic pain.

Comparing Pain and Depressive Symptoms of Chronic Opioid Therapy Patients Receiving Dose Reduction and Risk Mitigation Initiatives With Usual Care

Dose reduction and risk mitigation initiatives have been recommended to reduce opioid-related risks among patients receiving chronic opioid therapy (COT), but questions remain over whether these initiatives worsen pain control and quality of life. In 2014 to 2015, we interviewed 1,588 adult COT patients within a health care system in Washington State and compared those who received dose reduction and risk mitigation initiatives in primary care clinics (intervention) with patients in comparable health care settings without initiatives (control). The primary outcomes were pain assessed using the pain, enjoyment, and general activity (PEG) scale, a 3-item scale to assess global pain intensity and interference, with secondary measures including depression (Patient Health Questionnaire-8 scale). Generalized estimating equations for linear regression models were used to estimate differences in mean scores between intervention and control sites. Estimated differences, adjusted for patient characteristics and weighted for nonresponse, between patients at intervention and control clinics were not clinically significant for the PEG (-.03, 95% confidence interval = -.25 to .19) or Patient Health Questionnaire-8 (-.64, 95% confidence interval = -1.19 to -.08). We found no evidence that COT patients in clinics with dose reduction and risk mitigation initiatives had clinically meaningful differences in pain intensity, interference with activities and enjoyment of life, or depressive symptoms compared with control health care settings.

PERSPECTIVE

This article evaluates the effect of dose reduction and risk mitigation initiatives, such as those recently recommended by the Centers for Disease Control and Prevention, to reduce risks associated with COT on global pain and interference, depressive symptoms, and perceived pain relief and bothersomeness of side effects.

Yoga, Physical Therapy, or Education for Chronic Low Back Pain: A Randomized Noninferiority Trial

BACKGROUND

Yoga is effective for mild to moderate chronic low back pain (cLBP), but its comparative effectiveness with physical therapy (PT) is unknown. Moreover, little is known about yoga's effectiveness in underserved patients with more severe functional disability and pain.

OBJECTIVE

To determine whether yoga is noninferior to PT for cLBP.

DESIGN

12-week, single-blind, 3-group randomized noninferiority trial and subsequent 40-week maintenance phase. (ClinicalTrials.gov: NCT01343927).

SETTING

Academic safety-net hospital and 7 affiliated community health centers.

PARTICIPANTS

320 predominantly low-income, racially diverse adults with nonspecific cLBP.

INTERVENTION

Participants received 12 weekly yoga classes, 15 PT visits, or an educational book and newsletters. The maintenance phase compared yoga drop-in classes versus home practice and PT booster sessions versus home practice.

MEASUREMENTS

Primary outcomes were back-related function, measured by the Roland Morris Disability Questionnaire (RMDQ), and pain, measured by an 11-point scale, at 12 weeks. Prespecified noninferiority margins were 1.5 (RMDQ) and 1.0 (pain). Secondary outcomes included pain medication use, global improvement, satisfaction with intervention, and health-related quality of life.

RESULTS

One-sided 95% lower confidence limits were 0.83 (RMDQ) and 0.97 (pain), demonstrating noninferiority of yoga to PT. However, yoga was not superior to education for either outcome. Yoga and PT were similar for most secondary outcomes. Yoga and PT participants were 21 and 22 percentage points less likely, respectively, than education participants to use pain medication at 12 weeks. Improvements in yoga and PT groups were maintained at 1 year with no differences between maintenance strategies. Frequency of adverse events, mostly mild self-limited joint and back pain, did not differ between the yoga and PT groups.

LIMITATIONS

Participants were not blinded to treatment assignment. The PT group had disproportionate loss to follow-up.

CONCLUSION

A manualized yoga program for nonspecific cLBP was noninferior to PT for function and pain.

PRIMARY FUNDING SOURCE

National Center for Complementary and Integrative Health of the National Institutes of Health.

The persistence of the effects of acupuncture after a course of treatment: a meta-analysis of patients with chronic pain

There is uncertainty regarding how long the effects of acupuncture treatment persist after a course of treatment. We aimed to determine the trajectory of pain scores over time after acupuncture, using a large individual patient data set from high-quality randomized trials of acupuncture for chronic pain. The available individual patient data set included 29 trials and 17,922 patients. The chronic pain conditions included musculoskeletal pain (low back, neck, and shoulder), osteoarthritis of the knee, and headache/migraine. We used meta-analytic techniques to determine the trajectory of posttreatment pain scores. Data on longer term follow-up were available for 20 trials, including 6376 patients. In trials comparing acupuncture to no acupuncture control (wait-list, usual care, etc), effect sizes diminished by a nonsignificant 0.011 SD per 3 months (95% confidence interval: -0.014 to 0.037, P = 0.4) after treatment ended. The central estimate suggests that approximately 90% of the benefit of acupuncture relative to controls would be sustained at 12 months. For trials comparing acupuncture to sham, we observed a reduction in effect size of 0.025 SD per 3 months (95% confidence interval: 0.000-0.050, P = 0.050), suggesting approximately a 50% diminution at 12 months. The effects of a course of acupuncture treatment for patients with chronic pain do not seem to decrease importantly over 12 months. Patients can generally be reassured that treatment effects persist. Studies of the cost-effectiveness of acupuncture should take our findings into account when considering the time horizon of acupuncture effects. Further research should measure longer term outcomes of acupuncture.

Yoga versus education for Veterans with chronic low back pain: study protocol for a randomized controlled trial

BACKGROUND

Chronic low back pain is the most frequent pain condition in Veterans and causes substantial suffering, decreased functional capacity, and lower quality of life. Symptoms of post-traumatic stress, depression, and mild traumatic brain injury are highly prevalent in Veterans with back pain. Yoga for low back pain has been demonstrated to be effective for civilians in randomized controlled trials. However, it is unknown if results from previously published trials generalize to military populations.

METHODS/DESIGN

This study is a parallel randomized controlled trial comparing yoga to education for 120 Veterans with chronic low back pain. Participants are Veterans ≥18 years old with low back pain present on at least half the days in the past six months and a self-reported average pain intensity in the previous week of ≥4 on a 0-10 scale. The 24-week study has an initial 12-week intervention period, where participants are randomized equally into (1) a standardized weekly group yoga class with home practice or (2) education delivered with a self-care book. Primary outcome measures are change at 12 weeks in low back pain intensity measured by the Defense and Veterans Pain Rating Scale (0-10) and back-related function using the 23-point Roland Morris Disability Questionnaire. In the subsequent 12-week follow-up period, yoga participants are encouraged to continue home yoga practice and education participants continue following recommendations from the book. Qualitative interviews with Veterans in the yoga group and their partners explore the impact of chronic low back pain and yoga on family relationships. We also assess cost-effectiveness from three perspectives: the Veteran, the Veterans Health Administration, and society using electronic medical records, self-reported cost data, and study records.

DISCUSSION

This study will help determine if yoga can become an effective treatment for Veterans with chronic low back pain and psychological comorbidities.

TRIAL REGISTRATION

ClinicalTrials.gov: NCT02224183.

Effect of Mindfulness-Based Stress Reduction vs Cognitive Behavioral Therapy or Usual Care on Back Pain and Functional Limitations in Adults With Chronic Low Back Pain: A Randomized Clinical Trial

IMPORTANCE

Mindfulness-based stress reduction (MBSR) has not been rigorously evaluated for young and middle-aged adults with chronic low back pain.

OBJECTIVE

To evaluate the effectiveness for chronic low back pain of MBSR vs cognitive behavioral therapy (CBT) or usual care.

DESIGN, SETTING, AND PARTICIPANTS

Randomized, interviewer-blind, clinical trial in an integrated health care system in Washington State of 342 adults aged 20 to 70 years with chronic low back pain enrolled between September 2012 and April 2014 and randomly assigned to receive MBSR (n = 116), CBT (n = 113), or usual care (n = 113).

INTERVENTIONS

CBT (training to change pain-related thoughts and behaviors) and MBSR (training in mindfulness meditation and yoga) were delivered in 8 weekly 2-hour groups. Usual care included whatever care participants received.

MAIN OUTCOMES AND MEASURES

Coprimary outcomes were the percentages of participants with clinically meaningful (≥30%) improvement from baseline in functional limitations (modified Roland Disability Questionnaire [RDQ]; range, 0-23) and in self-reported back pain bothersomeness (scale, 0-10) at 26 weeks. Outcomes were also assessed at 4, 8, and 52 weeks.

RESULTS

There were 342 randomized participants, the mean (SD) [range] age was 49.3 (12.3) [20-70] years, 224 (65.7%) were women, mean duration of back pain was 7.3 years (range, 3 months-50 years), 123 (53.7%) attended 6 or more of the 8 sessions, 294 (86.0%) completed the study at 26 weeks, and 290 (84.8%) completed the study at 52 weeks. In intent-to-treat analyses at 26 weeks, the percentage of participants with clinically meaningful improvement on the RDQ was higher for those who received MBSR (60.5%) and CBT (57.7%) than for usual care (44.1%) (overall P = .04; relative risk [RR] for MBSR vs usual care, 1.37 [95% CI, 1.06-1.77]; RR for MBSR vs CBT, 0.95 [95% CI, 0.77-1.18]; and RR for CBT vs usual care, 1.31 [95% CI, 1.01-1.69]). The percentage of participants with clinically meaningful improvement in pain bothersomeness at 26 weeks was 43.6% in the MBSR group and 44.9% in the CBT group, vs 26.6% in the usual care group (overall P = .01; RR for MBSR vs usual care, 1.64 [95% CI, 1.15-2.34]; RR for MBSR vs CBT, 1.03 [95% CI, 0.78-1.36]; and RR for CBT vs usual care, 1.69 [95% CI, 1.18-2.41]). Findings for MBSR persisted with little change at 52 weeks for both primary outcomes.

CONCLUSIONS AND RELEVANCE

Among adults with chronic low back pain, treatment with MBSR or CBT, compared with usual care, resulted in greater improvement in back pain and functional limitations at 26 weeks, with no significant differences in outcomes between MBSR and CBT. These findings suggest that MBSR may be an effective treatment option for patients with chronic low back pain.

TRIAL REGISTRATION

clinicaltrials.gov Identifier: NCT01467843.

"We're all in this together": A qualitative study of predominantly low income minority participants in a yoga trial for chronic low back pain

OBJECTIVE

To explore the experiences of low-income minority adults taking part in a yoga dosing trial for chronic low back pain.

DESIGN

Individual semi-structured interviews were conducted with nineteen participants recruited from a randomized yoga dosing trial for predominantly low-income minority adults with chronic low back pain. Interviews discussed the impact of yoga on low back pain and emotions; other perceived advantages or disadvantages of the intervention; and facilitators and barriers to practicing yoga. Interviews were audio taped and transcribed, coded using ATLAS.ti software, and analyzed with inductive and deductive thematic analysis methods.

SETTING

Boston Medical Center, Boston, MA, USA.

RESULTS

Participants viewed yoga as a means of pain relief and attributed improved mood, greater ability to manage stress, and enhanced relaxation to yoga. Overall, participants felt empowered to self-manage their pain. Some found yoga to be helpful in being mindful of their emotions and accepting of their pain. Trust in the yoga instructors was a commonly cited facilitator for yoga class attendance. Lack of time, motivation, and fear of injury were reported barriers to yoga practice.

CONCLUSIONS

Yoga is a multidimensional treatment for low back pain that has the potential to favorably impact health in a predominantly low-income minority population.

Randomized clinical trial assessing whether additional massage treatments for chronic neck pain improve 12- and 26-week outcomes

BACKGROUND CONTEXT

This is the first study to systematically evaluate the value of a longer treatment period for massage. We provide a framework of how to conceptualize an optimal dose in this challenging setting of nonpharmacologic treatments.

PURPOSE

The aim was to determine the optimal dose of massage for neck pain.

STUDY DESIGN/SETTING

Two-phase randomized trial for persons with chronic nonspecific neck pain. Primary randomization to one of five groups receiving 4 weeks of massage (30 minutes 2x/or 3x/wk or 60 minutes 1x, 2x, or 3x/wk). Booster randomization of participants to receive an additional six massages, 60 minutes 1x/wk, or no additional massage.

PATIENT SAMPLE

A total of 179 participants from Group Health and the general population of Seattle, WA, USA recruited between June 2010 and August 2011 were included.

OUTCOME MEASURES

Primary outcomes self-reported neck-related dysfunction (Neck Disability Index) and pain (0-10 scale) were assessed at baseline, 12, and 26 weeks. Clinically meaningful improvement was defined as greater than or equal to 5-point decrease in dysfunction and greater than or equal to 30% decrease in pain from baseline.

METHODS

Clinically meaningful improvement for each primary outcome with both follow-up times was analyzed using adjusted modified Poisson generalized estimating equations (GEEs). Secondary analyses for the continuous outcomes used linear GEEs.

RESULTS

There were no observed differences by primary treatment group at 12 or 26 weeks. Those receiving booster dose had improvements in both dysfunction and pain at 12 weeks (dysfunction: relative risk [RR]=1.56 [1.08-2.25], p=.018; pain: RR=1.25 [0.98-1.61], p=.077), but those were nonsignificant at 26 weeks (dysfunction: RR=1.22 [0.85-1.74]; pain: RR=1.09 [0.82-1.43]). Subgroup analysis by primary and booster treatments found the booster dose only effective among those initially randomized to one of the 60-minute massage groups.

CONCLUSIONS

"Booster" doses for those initially receiving 60 minutes of massage should be incorporated into future trials of massage for chronic neck pain.

The clinical course of pain and function in older adults with a new primary care visit for back pain

OBJECTIVES

To report the clinical course of older adults presenting for a new primary care visit for back pain, no healthcare visit for back pain within the prior 6 months, by describing pain intensity, disability, pain interference, and resolution of back pain over 12 months.

DESIGN

Prospective inception cohort study.

SETTING

Primary care settings of three integrated healthcare systems in the United States that participated in the Back pain Outcomes using Longitudinal Data (BOLD) registry.

PARTICIPANTS

Five thousand two hundred eleven (99.5%) of the 5,239 adults aged 65 and older who had reached their 12-month follow-up date.

MEASUREMENTS

Baseline demographic characteristics, EQ-5D score, duration of back pain, expectation for recovery, depression, and anxiety. Participant-reported outcomes of back-related disability (Roland Morris Disability Questionnaire), numerical pain rating scale, pain interference, and resolution of back pain were collected at baseline and 3, 6, and 12 months.

RESULTS

Most improvement occurred within the first 3 months. The number and proportion with 30% improvement in back pain increased from 1,950 (42.3%) at 3 months to 1,994 (44.8%) by 12 months, and 1,331 (28.8%) and 1,576 (35.4%) had 30% improvement in disability at 3 and 12 months. Only 23.0% reported that their back pain had resolved at 12 months. Improvements in disability and interference with activity over 12 months differed according to age, duration of back pain, symptoms of depression and anxiety, and expectation for recovery.

CONCLUSION

The majority of older adults in primary care practice settings presenting with a new visit for back pain have persistent symptoms, disability, and interference over 12 months of follow-up. Future research is needed to identify risk factors for persistent symptoms and effective interventions.

Preference and Expectation for Treatment Assignment in a Randomized Controlled Trial of Once- vs Twice-weekly Yoga for Chronic Low Back Pain

Background:

In studies involving nonpharmacological complementary and alternative medicine interventions, participant blinding is very difficult. Participant expectations may affect perceived benefit of therapy. In studies of yoga as treatment for chronic low back pain, little is known about the relationship between patient expectations and preferences on outcomes. This study was designed to identify baseline predictors of preference and to determine if expectations and preferences for different doses of yoga affect back-related function and low back pain intensity.

Methods:

This was a secondary data analysis of a 12-week randomized controlled trial comparing once-weekly vs twice-weekly yoga for treatment of chronic low back pain in 93 adults from a predominantly low-income minority population. At baseline, participants were asked about back function, back pain, treatment expectations, and treatment preferences. We created a variable “concordance” to describe the matching of participant preference to randomized treatment. Our outcome variables were change in back function and pain intensity after 12 weeks of yoga instruction. We performed logistic regression to identify predictors of preference for once- or twice-weekly yoga instruction. We created linear regression models to identify independent associations between expectations, preference, concordance, and outcomes.

Results:

Worse back function at baseline was associated with 20% higher odds of preferring twice-weekly yoga (OR 1.2, CI 1.1, 1.3). Individuals with higher expectation scores for twice-weekly yoga had 90% higher odds of preferring twice-weekly vs once-weekly yoga (OR 1.9, CI 1.3, 2.7). Individuals with higher expectation scores for once-weekly yoga had 40% less odds of preferring twice-weekly yoga (OR 0.6, CI 0.5, 0.9). After controlling for baseline characteristics, we found no statistically significant relationship between treatment outcomes, preference, expectation scores, or concordance.

Conclusion:

In a population of predominantly low-income minority participants with chronic low back pain, worse back function was associated with preference for more frequent yoga classes. Those who preferred more yoga classes had higher expectations for those classes. Twelve-week change in back pain intensity and back function were not affected by dosing preference, expectation score, or concordance. More research is needed to better measure and quantify preference, expectations, and their relationship to outcomes in yoga research.

A qualitative study of changes in expectations over time among patients with chronic low back pain seeking four CAM therapies

BACKGROUND

The relationship between patient expectations about a treatment and the treatment outcomes, particularly for Complementary and Alternative Medicine (CAM) therapies, is not well understood. Using qualitative data from a larger study to develop a valid expectancy questionnaire for use with participants starting new CAM therapies, we examined how participants' expectations of treatment changed over the course of a therapy.

METHODS

We conducted semi-structured qualitative interviews with 64 participants initiating one of four CAM therapies (yoga, chiropractic, acupuncture, massage) for chronic low back pain. Participants just starting treatment were interviewed up to three times over a period of 3 months. Interviews were transcribed verbatim and analyzed using a qualitative mixed methods approach incorporating immersion/crystallization and matrix analysis for a decontexualization and recontextualization approach to understand changes in thematic emphasis over time.

RESULTS

Pre-treatment expectations consisted of conjecture about whether or not the CAM therapy could relieve pain and improve participation in meaningful activities. Expectations tended to shift over the course of treatment to be more inclusive of broader lifestyle factors, the need for long-term pain management strategies and attention to long-term quality of life and wellness. Although a shift toward greater acceptance of chronic pain and the need for strategies to keep pain from flaring was observed across participants regardless of therapy, participants varied in their assessments of whether increased awareness of the need for ongoing self-care and maintenance strategies was considered a "positive outcome". Regardless of how participants evaluated the outcome of treatment, participants from all four therapies reported increased awareness, acceptance of the chronic nature of pain, and attention to the need to take responsibility for their own health.

CONCLUSIONS

The shift in treatment expectations to greater acceptance of pain and the need for continued self-care suggests that future research should explore how CAM practitioners can capitalize on these shifts to encourage feelings of empowerment rather than disappointment surrounding realizations of the need for continued engagement with self-care.

Patient-reported outcomes associated with use of physical therapist services by older adults with a new visit for back pain

BACKGROUND

Among older adults, it is not clear how different types or amounts of physical therapy may be associated with improvements in back pain and function.

OBJECTIVE

The study objective was to investigate the association between types or amounts of physical therapist services and 1-year outcomes among older adults with back pain.

DESIGN

This was a prospective cohort study.

METHODS

A total of 3,771 older adults who were enrolled in a cohort study and who had a new primary care visit for back pain participated. Physical therapy use was ascertained from electronic health records. The following patient-reported outcomes were collected over 12 months: back-related disability (Roland-Morris Disability Questionnaire) and back and leg pain intensity (11-point numerical rating scale). Marginal structural models were used to estimate average effects of different amounts of physical therapy use on disability and pain for all types of physical therapy and for active, passive, and manual physical therapy.

RESULTS

A total of 1,285 participants (34.1%) received some physical therapy. There was no statistically significant gradient in relationships between physical therapy use and back-related disability score. The use of passive or manual therapy was not consistently associated with pain outcomes. Higher amounts of active physical therapy were associated with decreased back and leg pain and increased odds of clinically meaningful improvements in back and leg pain relative to results obtained with no active physical therapy.

LIMITATIONS

The fact that few participants had high amounts of physical therapy use limited precision and the ability to test for nonlinear relationships for the amount of use.

CONCLUSIONS

Higher amounts of active physical therapy were most consistently related to the greatest improvements in pain intensity; however, as with all observational studies, the results must be interpreted with caution.

Serial case reporting yoga for idiopathic and degenerative scoliosis

Background:

Non-surgical techniques for treating scoliosis frequently focus on realigning the spine, typically by muscular relaxation or muscular or ligamentous stretching. However, such treatments, which include physical therapeutic, chiropractic, and bracing techniques, are inconsistently supported by current evidence. In this study, we assess the possible benefits of asymmetrical strengthening of truncal muscles on the convex side of the scoliotic curve through a single yoga pose, the side plank pose, in idiopathic and degenerative scoliosis.

Methods:

Twenty-five patients with idiopathic or degenerative scoliosis and primary curves measuring 6 to 120 degrees by the Cobb method had spinal radiographs and were then taught the side plank pose. After 1 week performing the pose with convexity downward for 10 to 20 seconds, they were instructed to maintain the posture once daily for as long as possible on that one side only. A second series of spinal radiographs was taken 3 to 22 months later. Pre- and post-yoga Cobb measurements were compared.

Results:

The mean self-reported practice of the yoga pose was 1.5 minutes per day, 6.1 days per week, for a mean follow-up period of 6.8 months. Among all patients, a significant improvement in the Cobb angle of the primary scoliotic curve of 32.0% was found. Among 19 compliant patients, the mean improvement rose to 40.9%. Improvements did not differ significantly among adolescent idiopathic and degenerative subtypes (49.6% and 38.4%, respectively).

Conclusions:

Asymmetrically strengthening the convex side of the primary curve with daily practice of the side plank pose held for as long as possible for an average of 6.8 months significantly reduced the angle of primary scoliotic curves. These results warrant further testing.