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Abstract
The glymphatic system is network of perivascular spaces through which cerebrospinal fluid and interstitial fluid can move through the brain, clearing metabolic waste, such as amyloid beta, lactate and more, from the parenchyma. This cleaning system is regulated by sleep and norepinephrine, with increased levels of norepinephrine during wakefulness inhibiting fluid movement. Norepinephrine is also essential for transition from acute to chronic pain, and sufferers of chronic neuropathic pain frequently present with sleep disruption. These connections among glymphatic clearance, sleep, and pain are very intriguing, and might lead to nonpharmaceutical interventions for pain treatment. This short perspective provides a rationale for the hypothesis that mind-body interventions-such as acupuncture-can reduce norepinephrine and increase glymphatic function, ultimately relieving chronic neuropathic pain.
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Affiliation(s)
- Nanna Goldman
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Lauren M Hablitz
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, USA
| | - Yuki Mori
- Center for Basic and Translational Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - Maiken Nedergaard
- Center for Translational Neuromedicine, University of Rochester Medical Center, Rochester, NY, USA.,Center for Basic and Translational Neuroscience, University of Copenhagen, Copenhagen, Denmark
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202
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Pan F, Tian J, Cicuttini F, Jones G. Sleep Disturbance and Its Association with Pain Severity and Multisite Pain: A Prospective 10.7-Year Study. Pain Ther 2020; 9:751-763. [PMID: 33085011 PMCID: PMC7648801 DOI: 10.1007/s40122-020-00208-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 10/06/2020] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Sleep disturbance is often comorbid with chronic pain disorders, with emerging evidence suggesting a stronger effect of sleep disturbance on pain than vice versa; however, few studies have evaluated the long-term associations between sleep disturbance and pain. This study was to examine the associations of sleep disturbance with knee pain severity, number of painful sites (NPS) and persistent pain in a 10.7-year cohort study. METHODS A total of 1099 community-dwelling older adults (age mean ± SD, 63 ± 7.5 years; 51% female) were recruited and followed up at 2.6, 5.1 and 10.7 years later. Data on demographics, body mass index, physical activity and comorbidities were collected. At each time point, sleep disturbance, knee pain severity and NPS were assessed by using questionnaires. Multisite pain (MSP) was defined as NPS ≥ 2. Persistent knee pain or MSP was defined as having knee pain or MSP at all time points, respectively. Multivariable mixed-effects models and log-binomial regression were applied. RESULTS In multivariable analyses, sleep disturbance was associated with greater knee pain severity (β 0.91/unit, 95% CI 0.70-1.11) and more NPS [(relative risk (RR) 1.10/unit, 95% CI 1.07-1.14] in a dose-response manner. Persistent sleep disturbance was associated with persistent knee pain (RR 1.90, 1.26-2.87) and MSP (RR 1.29, 1.07-1.56). Persistent knee pain and MSP were also associated with persistent sleep disturbance (knee pain: RR = 1.99; MSP: RR = 2.71, both P < 0.05). CONCLUSIONS Sleep disturbance was independently associated with greater pain severity and NPS in a dose-response manner. A reciprocal relationship between persistent sleep disturbance and persistent pain suggests treating either problem could help the other.
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Affiliation(s)
- Feng Pan
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS, 7000, Australia.
| | - Jing Tian
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS, 7000, Australia
| | - Flavia Cicuttini
- Department of Epidemiology and Preventive Medicine, Monash University Medical School, Commercial Road, Melbourne, VIC, 3181, Australia
| | - Graeme Jones
- Menzies Institute for Medical Research, University of Tasmania, Private Bag 23, Hobart, TAS, 7000, Australia
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203
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Getachew M, Lerdal A, Småstuen MC, Gay CL, Aamodt A, Tesfaye M, Lindberg MF. High levels of preoperative pain and fatigue are red flags for moderate-severe pain 12 months after total knee arthroplasty-A longitudinal cohort study. Musculoskeletal Care 2020; 19:186-192. [PMID: 33085181 PMCID: PMC8247059 DOI: 10.1002/msc.1522] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 10/07/2020] [Indexed: 12/27/2022]
Abstract
Background Moderate/severe pain after total knee arthroplasty (TKA) is a poor surgical outcome. Many studies have identified preoperative risk factors of pain after TKA, but studies of the joint contributions of co‐occurring symptoms are lacking. Methods Patients undergoing primary TKA (n = 202) were enrolled in a longitudinal cohort study. Preoperatively, patients completed questionnaires measuring demographics and symptoms (pain, fatigue, sleep problems and depression). Pain was re‐assessed 12 months after TKA. Logistic regression analysis was used to compute the probabilities of moderate‐severe pain at 12 months based on preoperative symptom levels, and results were combined into a risk matrix. Results More than one‐third (40%) of patients (n = 187) reported moderate‐severe pain after TKA. Among preoperative risk factors included in the logistic regression analyses were age, sex, pain, fatigue, sleep problems and depression. Adjusting for possible confounders, fatigue (p = 0.02) and pain (p = 0.01) were significant risk factors for moderate‐severe pain at 12‐months follow‐up and were retained in the final risk matrix. The co‐occurrence of high‐preoperative fatigue and pain scores resulted in 57% estimated probability of moderate‐severe pain at 12 months. Similarly, the co‐occurrence of low‐preoperative fatigue and pain scores resulted in 14% estimated probability of moderate‐severe pain 12 months after TKA. Conclusion The combination of high fatigue and pain scores prior to surgery was a key risk factor for moderate‐severe pain 12 months after TKA. Mapping of these factors could be used preoperatively to identify patients who are at risk to experience a poor outcome of TKA.
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Affiliation(s)
- Mestawet Getachew
- Department of Clinical Pharmacy, School of Pharmacy, Institute of Health, Jimma University, Jimma, Ethiopia.,Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Anners Lerdal
- Department of Interdisciplinary Health Sciences, Faculty of Medicine, Institute of Health and Society, University of Oslo, Oslo, Norway.,Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Milada Cvancarova Småstuen
- Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway.,Faculty of Health Science, Oslo Metropolitan University, Oslo, Norway
| | - Caryl L Gay
- Department of Research and Administration, Lovisenberg Diaconal Hospital, Oslo, Norway.,Department of Family Health Care Nursing, University of California, San Francisco, California, USA
| | - Arild Aamodt
- Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
| | - Million Tesfaye
- Department of Anesthesiology, Faculty of Medicine, Institute of Health, Jimma University, Jimma, Ethiopia
| | - Maren Falch Lindberg
- Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Orthopaedic Surgery, Lovisenberg Diaconal Hospital, Oslo, Norway
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204
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Luo M, Song B, Zhu J. Electroacupuncture: A New Approach for Improved Postoperative Sleep Quality After General Anesthesia. Nat Sci Sleep 2020; 12:583-592. [PMID: 32922103 PMCID: PMC7457783 DOI: 10.2147/nss.s261043] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 08/04/2020] [Indexed: 11/23/2022] Open
Abstract
General anesthesia produces a state of drug-induced unconsciousness that is controlled by the extent and duration of administered agents. Whether inhalation or intravenous in formulation, such agents may interfere with normal sleep-wake cycles, impairing postoperative sleep quality and creating complications. Electroacupuncture is a new approach widely applied in clinical practice during recent years. This particular technology helps regulate neurotransmitter concentrations in the brain, lowering norepinephrine and dopamine levels to improve sleep quality. It also alleviates surgical pain that degrades postoperative sleep quality after general anesthesia by downregulating immune activity (SP, NK-1, and COX-1) and upregulating serotonin receptor (5-HT1AR, 5-HT2AR) and endocannabinoid expression levels. However, large-scale, multicenter studies are still needed to determine the optimal duration, frequency, and timing of electroacupuncture for such use.
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Affiliation(s)
- Man Luo
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People’s Republic of China
| | - Bijia Song
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People’s Republic of China
- Department of Anesthesiology, Friendship Hospital of Capital Medical University, Beijing, People’s Republic of China
| | - Junchao Zhu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, Liaoning, People’s Republic of China
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205
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Stanhope J, Breed MF, Weinstein P. Exposure to greenspaces could reduce the high global burden of pain. ENVIRONMENTAL RESEARCH 2020; 187:109641. [PMID: 32447087 PMCID: PMC7207132 DOI: 10.1016/j.envres.2020.109641] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 05/17/2023]
Abstract
Painful conditions are among the leading causes of years lived with disability, and may increase following the coronavirus pandemic, which has led to temporary closure of some healthcare services for people with chronic pain. To reduce this burden, novel, cost-effective and accessible interventions are required. We propose that greenspace exposure may be one such intervention. Drawing on evidence from neuroscience, physiology, microbiology, and psychology, we articulate how and why exposure to greenspaces could improve pain outcomes and reduce the high global burden of pain. Greenspace exposure potentially provides opportunities to benefit from known or proposed health-enhancing components of nature, such as environmental microbiomes, phytoncides, negative air ions, sunlight, and the sights and sounds of nature itself. We review the established and potential links between these specific exposures and pain outcomes. While further research is required to determine possible causal links between greenspace exposure and pain outcomes, we suggest that there is already sufficient evidence to help reduce the global burden of pain by improving access and exposure to quality greenspaces.
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Affiliation(s)
- Jessica Stanhope
- School of Biological Sciences, The University of Adelaide, North Tce, Adelaide, South Australia, 5005, Australia; School of Allied Health Science and Practice, The University of Adelaide, North Tce, Adelaide, South Australia, 5005, Australia.
| | - Martin F Breed
- College of Science and Engineering, Flinders University of South Australia, Sturt Rd, Bedford Park, South Australia, 5042, Australia; Healthy Urban Microbiome Initiative (HUMI), Adelaide, South Australia, Australia.
| | - Philip Weinstein
- School of Biological Sciences, The University of Adelaide, North Tce, Adelaide, South Australia, 5005, Australia; Healthy Urban Microbiome Initiative (HUMI), Adelaide, South Australia, Australia; School of Public Health, The University of Adelaide, North Tce, Adelaide, South Australia, 5005, Australia.
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206
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Othman R, Jayakaran P, Swain N, Dassanayake S, Tumilty S, Mani R. Relationships Between Psychological, Sleep, and Physical Activity Measures and Somatosensory Function in People With Peripheral Joint Pain: A Systematic Review and Meta-Analysis. Pain Pract 2020; 21:226-261. [PMID: 32696604 DOI: 10.1111/papr.12943] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 06/21/2020] [Accepted: 07/17/2020] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Alteration in somatosensory function has been linked to pain experience in individuals with joint pain. In this systematic review we aimed to establish the level of evidence of associations between psychological, social, physical activity, and sleep measures and somatosensory function that were assessed via quantitative sensory testing (QST) among individuals with joint pain. METHODS A comprehensive literature search was conducted in 6 electronic databases from their inception to July 2019. Two reviewers independently assessed the methodological quality using a modified Quality in Prognostic Studies (QUIPS) tool and supplemented with recommendations from the Critical Appraisal and Data Extraction for Systematic Review of Prediction Modelling Studies (CHARMS) checklist and the Quality Assessment of Diagnostic Accuracy Studies (QUADAS-2) tool. The level of evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) system. Data were pooled to evaluate the strength of the relationships of interest. RESULTS Seventeen studies related to joint pain were included. Pain catastrophizing, depression, anxiety, and physical activity level have been shown to have a significant (small to fair) association with several QST measures. Pressure pain threshold (PPT) is the only measure that was found to be consistently correlated with all the domains. The overall quality of evidence for all factors ranged from very low to moderate. Subgroup analysis revealed a stronger association for depression and pain catastrophizing and PPT and temporal pain summation in individuals with shoulder pain. CONCLUSION Psychological factors and physical activity levels are associated with somatosensory function in people with joint pain. These factors need to be adjusted when establishing predictive relationships between somatosensory function and pain outcomes in individuals with joint pain.
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Affiliation(s)
- Rani Othman
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Prasath Jayakaran
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Nicola Swain
- Psychological Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Suranga Dassanayake
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Steve Tumilty
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
| | - Ramakrishnan Mani
- Centre for Health, Activity and Rehabilitation Research, School of Physiotherapy, University of Otago, Dunedin, New Zealand
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207
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Luo M, Song B, Zhu J. Sleep Disturbances After General Anesthesia: Current Perspectives. Front Neurol 2020; 11:629. [PMID: 32733363 PMCID: PMC7360680 DOI: 10.3389/fneur.2020.00629] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/28/2020] [Indexed: 12/18/2022] Open
Abstract
The purpose of this article is to review (1) sleep mechanism under general anesthesia, harmful effects of postoperative sleep disturbances; (2) risk factors associated with postoperative sleep disturbances; (3) measures to prevent and improve postoperative sleep disturbances. General anesthesia changes the postoperative sleep structure especially in elderly patients after major surgery and results in a high incidence rate of sleep disturbances. Sleep disturbances produce harmful effects on postoperative patients and lead to a higher risk of delirium, more cardiovascular events, and poorer recovery. Some researchers do propose non-pharmacological treatments such as attention to environmental and psychological factors, application of electroacupuncture (EA) technology and pharmacological treatments are helpful, but larger high-quality clinical trials with longer following-up are needed to further investigate the efficacy and safety.
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Affiliation(s)
- Man Luo
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Bijia Song
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China.,Department of Anesthesiology, Friendship Hospital of Capital Medical University, Beijing, China
| | - Junchao Zhu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
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208
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209
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Chai PR, Schwartz E, Hasdianda MA, Azizoddin DR, Kikut A, Jambaulikar GD, Edwards RR, Boyer EW, Schreiber KL. A Brief Music App to Address Pain in the Emergency Department: Prospective Study. J Med Internet Res 2020; 22:e18537. [PMID: 32432550 PMCID: PMC7270860 DOI: 10.2196/18537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 04/18/2020] [Accepted: 04/30/2020] [Indexed: 12/26/2022] Open
Abstract
Background Emergency physicians face the challenge of relieving acute pain daily. While opioids are a potent treatment for pain, the opioid epidemic has ignited a search for nonopioid analgesic alternatives that may decrease the dose or duration of opioid exposure. While behavioral therapies and complementary medicine are effective, they are difficult to deploy in the emergency department. Music is a potential adjunctive therapy that has demonstrated effectiveness in managing pain. Objective Our objective was to understand the feasibility and potential for an effect of a novel music app to address acute pain and anxiety in patients admitted to an emergency department observation unit. Methods This prospective cohort study enrolled patients admitted to an emergency department observation unit with pain who had received orders for opioids. We gathered baseline pain and psychosocial characteristics including anxiety, sleep disturbance, and pain catastrophizing using validated questionnaires. Participants received a smartphone-based music intervention and listened to the music in either a supervised (research assistant–delivered music session 3 times during their stay) or unsupervised manner (music used ad lib by participant). The app collected premusic and postmusic pain and anxiety scores, and participants provided qualitative feedback regarding acceptability of operating the music intervention. Results We enrolled 81 participants and randomly assigned 38 to an unsupervised and 43 to a supervised group. Mean pain in both groups was 6.1 (1.8) out of a possible score of 10. A total of 43 (53%) reported previous use of music apps at home. We observed an overall modest but significant decrease in pain (mean difference –0.81, 95% CI –0.45 to –1.16) and anxiety (mean difference –0.72, 95% CI –0.33 to –1.12) after music sessions. Reduction of pain and anxiety varied substantially among participants. Individuals with higher baseline pain, catastrophizing (about pain), or anxiety reported greater relief. Changes in pain were correlated to changes in anxiety (Pearson ρ=0.3, P=.02) but did not vary between supervised and unsupervised groups. Upon conclusion of the study, 46/62 (74%) reported they liked the music intervention, 57/62 (92%) reported the app was easy to use, and 49/62 (79%) reported they would be willing to use the music intervention at home. Conclusions A smartphone-based music intervention decreased pain and anxiety among patients in an emergency department observation unit, with no difference between supervised and unsupervised use. Individuals reporting the greatest reduction in pain after music sessions included those scoring highest on baseline assessment of catastrophic thinking, suggesting there may be specific patient populations that may benefit more from using music as an analgesic adjunct in the emergency department. Qualitative feedback suggested that this intervention was feasible and acceptable by emergency department patients.
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Affiliation(s)
- Peter R Chai
- Division of Medical Toxicology, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States.,Department of Psychosocial Oncology and Palliative Care, Dana Farber Cancer Institute, Boston, MA, United States.,The Koch Institute for Integrated Cancer Research, Massachusetts Institute of Technology, Boston, MA, United States.,The Fenway Institute, Boston, MA, United States
| | - Emily Schwartz
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, MA, United States
| | | | - Desiree R Azizoddin
- Department of Psychosocial Oncology and Palliative Care, Dana Farber Cancer Institute, Boston, MA, United States
| | - Anna Kikut
- Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States
| | | | - Robert R Edwards
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, MA, United States
| | - Edward W Boyer
- Division of Medical Toxicology, Department of Emergency Medicine, Brigham and Women's Hospital, Boston, MA, United States.,The Fenway Institute, Boston, MA, United States
| | - Kristin L Schreiber
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women's Hospital, Boston, MA, United States
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210
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Meints SM, Edwards RR, Gilligan C, Schreiber KL. Behavioral, Psychological, Neurophysiological, and Neuroanatomic Determinants of Pain. J Bone Joint Surg Am 2020; 102 Suppl 1:21-27. [PMID: 32251127 PMCID: PMC8272523 DOI: 10.2106/jbjs.20.00082] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Samantha M. Meints
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Robert R. Edwards
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Christopher Gilligan
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
| | - Kristin L. Schreiber
- Department of Anesthesiology, Perioperative, and Pain Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts
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211
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Adam R, Kanakarajan S, Onyeakazi U, Columb M, Galley H. Phase II double-blind randomised controlled trial of exogenous administration of melatonin in chronic pain (DREAM-CP): a study protocol. BMJ Open 2020; 10:e034443. [PMID: 32184313 PMCID: PMC7076250 DOI: 10.1136/bmjopen-2019-034443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION Chronic pain is prevalent, and approximately half of patients with chronic pain experience sleep disturbance. Exogenous melatonin is licensed to treat primary insomnia and there is some evidence for analgesic effects of melatonin.The aim of this study is to investigate the effects of oral melatonin (as Circadin) 2 mg at night in adults with severe non-malignant pain of at least 3 months' duration. METHODS AND ANALYSIS We will conduct a randomised double-blind placebo-controlled cross-over study. The primary outcome is sleep disturbance. Secondary outcomes are pain intensity, actigraphy, fatigue, reaction time testing, serum melatonin and endogenous opioid peptide levels along with patient views about study participation.We aim to recruit 60 patients with severe chronic pain (average pain intensity ≥7 on the Brief Pain Inventory (BPI)) from a tertiary referral pain clinic in Northeast Scotland. Participants will be randomised to receive melatonin (as modified release Circadin) 2 mg daily for 6 weeks or placebo, followed by a 4-week washout period, then 6 weeks treatment with the treatment they did not receive. Participants will complete the Verran Snyder-Halpern Sleep Scale, Pittsburgh Sleep Quality Index, Pain and Sleep Questionnaire 3-item index, BPI and psychomotor vigilance reaction time testing at 6 points over 20 weeks. Actigraphy watches will be used to provide objective measures of sleep duration and latency and other sleep measures and will prompt patients to report contemporaneous pain and fatigue scores daily.Cross-over analyses will include tests for effects of treatment, period, treatment-period interaction (carryover effect) and sequence. Within-patient effects and longitudinal data will be analysed using mixed linear models, accounting for potential confounders. ETHICS AND DISSEMINATION Approved by Office for Research Ethics Committees Northern Ireland, reference 19/NI/0007. Results will be published in peer-reviewed journals and will be presented at national and international conferences. TRIAL REGISTRATION NUMBER ISRCTN12861060.
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Affiliation(s)
- Rosalind Adam
- Academic Primary Care, Institute of Applied Health Sciences, Aberdeen, UK
| | | | - Uzunma Onyeakazi
- The Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - Malachy Columb
- Wythenshawe Hospital Acute Intensive Care Unit, Manchester University NHS Foundation Trust, Manchester, Greater Manchester, UK
| | - Helen Galley
- The Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
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212
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Pereira SR, Tello Velasquez J, Duggan S, Ivanisevic B, McKenna JP, McCreary C, Downer EJ. Recent advances in the understanding of the aetiology and therapeutic strategies in burning mouth syndrome: Focus on the actions of cannabinoids. Eur J Neurosci 2020; 55:1032-1050. [DOI: 10.1111/ejn.14712] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/06/2020] [Accepted: 02/20/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Sónia R. Pereira
- Discipline of Physiology School of Medicine Trinity Biomedical Sciences Institute Trinity College Dublin Dublin 2 Ireland
| | - Johana Tello Velasquez
- Discipline of Physiology School of Medicine Trinity Biomedical Sciences Institute Trinity College Dublin Dublin 2 Ireland
| | - Sarah Duggan
- Discipline of Physiology School of Medicine Trinity Biomedical Sciences Institute Trinity College Dublin Dublin 2 Ireland
| | - Bojana Ivanisevic
- Cork University Dental School and Hospital University College Cork Cork Ireland
| | - Joseph P. McKenna
- Cork University Dental School and Hospital University College Cork Cork Ireland
| | - Christine McCreary
- Cork University Dental School and Hospital University College Cork Cork Ireland
| | - Eric J. Downer
- Discipline of Physiology School of Medicine Trinity Biomedical Sciences Institute Trinity College Dublin Dublin 2 Ireland
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213
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Amtmann D, Bamer AM, Askew R, Jensen MP. Cross-lagged longitudinal analysis of pain intensity and sleep disturbance. Disabil Health J 2020; 13:100908. [PMID: 32081590 DOI: 10.1016/j.dhjo.2020.100908] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 01/23/2020] [Accepted: 02/08/2020] [Indexed: 01/15/2023]
Abstract
BACKGROUND There is substantial evidence that pain intensity and sleep are related, with findings generally suggesting more support for the influence of sleep on pain intensity than vice versa. However, the strength and direction of the relationship has been found to vary among different populations, with few studies in individuals with chronic physical disabilities. OBJECTIVE Examine the directionality of the sleep and pain relationship in individuals with chronic physical disabilities. METHODS Cross-lagged effects models were generated using data from a longitudinal observational survey study of individuals (N = 1660) with multiple sclerosis (MS), muscular dystrophy (MD), post-polio syndrome (PPS), and spinal cord injury (SCI). Models evaluated the correlational effects of sleep disturbance and pain intensity, as well as the cross-lagged effects of sleep disturbance to pain intensity and vice versa. RESULTS The effects of pain on sleep were stronger than sleep on pain, although the magnitude of the effects were both relatively weak. Analyses within individual samples were consistent with the overall sample results for MS, MD, and PPS. In the SCI sample the magnitude and direction of the cross-lagged model paths were more variable than in the other samples. CONCLUSIONS The relationship between pain intensity and sleep disturbance appears bi-directional, but the effects are small in a sample of individuals with long-term disabilities. The temporal effects of pain on sleep disturbance appear stronger than the effects of sleep disturbance on pain intensity. Future research is needed to better understand this relationship in the context of pain and/or sleep disturbance treatments.
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Affiliation(s)
- Dagmar Amtmann
- University of Washington, Rehabilitation Medicine, Box 354237, 4907 25th Ave NE, Seattle, WA, 98105, USA.
| | - Alyssa M Bamer
- University of Washington, Rehabilitation Medicine, Box 354237, 4907 25th Ave NE, Seattle, WA, 98105, USA.
| | - Robert Askew
- University of Washington, Rehabilitation Medicine, Box 354237, 4907 25th Ave NE, Seattle, WA, 98105, USA.
| | - Mark P Jensen
- University of Washington, Rehabilitation Medicine, Box 354237, 4907 25th Ave NE, Seattle, WA, 98105, USA.
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214
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Poor Sleep Is a Risk Factor for Low-Back Pain among Healthcare Workers: Prospective Cohort Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17030996. [PMID: 32033339 PMCID: PMC7036951 DOI: 10.3390/ijerph17030996] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 01/31/2020] [Accepted: 02/02/2020] [Indexed: 12/13/2022]
Abstract
This study aimed to investigate the association between poor sleep and risk of low-back pain (LBP) in healthcare workers. Using a prospective cohort design with 1-year follow-up, a total of 1955 healthcare workers (60% nurses) from 389 departments at 19 hospitals responded to questionnaires containing items related to lifestyle, health, and working environment. Associations between sleep scores (0-100) at baseline and LBP intensity (0-10) at follow-up were modelled using cumulative logistic regression accounting for clustering at the department level and adjusted for lifestyle and psychosocial confounders. In the full population of healthcare workers, 43.9% and 24.4% experienced moderate and poor sleep, respectively. In the fully adjusted model with good sleep as reference, moderate, and poor sleep increased the risk of LBP at follow-up, with odds ratios (OR's) of 1.66 (95% confidence interval (CI) 1.35-2.04) and 2.05 (95% CI 1.57-2.69), respectively. Three sensitivity analyses including healthcare workers free from LBP, nurses, and nurses free from LBP at baseline, respectively, yielded similar results. In conclusion, poor sleep constitutes a potent risk factor for LBP among healthcare workers. The presented results provide strong incentives to evaluate and weigh current prevention policies against an updated biopsychosocial framework.
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Skarpsno ES, Mork PJ, Hagen K, Nilsen TIL, Marcuzzi A. Number of Chronic Nighttime Insomnia Symptoms and Risk of Chronic Widespread Pain and Pain-Related Disability: The HUNT Study. Nat Sci Sleep 2020; 12:1227-1236. [PMID: 33402855 PMCID: PMC7778442 DOI: 10.2147/nss.s284498] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/25/2020] [Indexed: 02/04/2023] Open
Abstract
STUDY OBJECTIVES To examine the association between the number of chronic nighttime insomnia symptoms and the risk of chronic widespread pain (CWP) and pain-related disability. METHODS A prospective study of 10,847 participants in the Norwegian HUNT Study without chronic musculoskeletal pain at baseline in 2006-2008. We used a modified Poisson regression model to estimate adjusted risk ratios (RRs) with a 95% confidence interval (CI) for CWP and pain-related disability at follow-up in 2017-2019 associated with insomnia and number of nighttime insomnia symptoms at baseline. Chronic insomnia was defined according to the current classification system and grouped into three categories based on the number of reported nighttime symptoms (ie, difficulty initiating sleep, trouble maintaining sleep and early morning awakenings). RESULTS Compared to the reference group of people without insomnia, people with insomnia had RRs for CWP and pain-related disability of 1.64 (1.26-2.14) and 1.63 (1.37-1.94), respectively. When people with insomnia were categorized based on the number of nighttime symptoms, people who reported one, two, or three nighttime symptoms had RRs of CWP of 1.19 (95% CI 0.80-1.78), 1.78 (95 CI 1.13-2.80) and 3.08 (95% CI 1.93-4.92), respectively, compared to people without insomnia. The corresponding RRs for pain-related disability were 1.49 (95% CI 1.17-1.89), 1.46 (95% CI 2.04-2.05), and 2.46 (95% CI 1.76-3.42). CONCLUSION These findings indicate that people with insomnia characterized by symptoms in all phases of the sleep period have a substantially increased risk of CWP and pain-related disability.
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Affiliation(s)
- Eivind Schjelderup Skarpsno
- Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.,Department of Neurology and Clinical Neurophysiology, St. Olavs Hospital, Trondheim, Norway
| | - Paul Jarle Mork
- Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Knut Hagen
- Department of Neuromedicine and Movement Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.,Clinical Research Unit Central Norway, St. Olavs Hospital, Trondheim, Norway
| | - Tom Ivar Lund Nilsen
- Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway.,Clinic of Anaesthesia and Intensive Care, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Anna Marcuzzi
- Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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Herrero Babiloni A, De Koninck BP, Beetz G, De Beaumont L, Martel MO, Lavigne GJ. Sleep and pain: recent insights, mechanisms, and future directions in the investigation of this relationship. J Neural Transm (Vienna) 2019; 127:647-660. [DOI: 10.1007/s00702-019-02067-z] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 08/16/2019] [Indexed: 12/13/2022]
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