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Szklarek M, Kostka T, Kostka J. Correlates of Restless Legs Syndrome in Older People. J Clin Med 2024; 13:1364. [PMID: 38592261 PMCID: PMC10932329 DOI: 10.3390/jcm13051364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 02/14/2024] [Accepted: 02/24/2024] [Indexed: 04/10/2024] Open
Abstract
Background: We examined the association between restless legs syndrome (RLS) and comprehensive geriatric assessment (CGA) data in two older European populations. The second goal was to evaluate correlates of their quality of life (QoL). Methods: Diagnostic criteria of the International RLS Study Group (IRLSSG) and elements of CGA were used in this study. Results: Among the examined 246 participants, 77 (31.3%) suffered from RLS, more often in the UK (39.4%) than in Poland (25.4%) (p = 0.019). In the multivariate logistic regression model, female sex [OR (CI) = 3.29 (1.51-7.21); p = 0.0014], the number of medications per day [OR (CI) = 1.11 (1.02-1.20); p = 0.011] and alcohol consumption [OR (CI) = 5.41 (2.67-10.95); p < 0.001] increased the probability of RLS. Residing in Poland [OR (CI) = 3.06 (1.36-6.88); p = 0.005], the presence of RLS [OR (CI) = 2.90 (1.36-6.17); p = 0.004], chronic heart failure, [OR (CI) = 3.60 (1.75-7.41); p < 0.001], osteoarthritis [OR (CI) = 2.85 (1.47-5.49); p = 0.0016], and urinary incontinence [OR (CI) = 4.74 (1.87-11.9); p < 0.001] were associated with a higher probability of mobility dimension problems in the QoL. Higher physical activity was related to a lower probability of mobility problems [OR (CI) = 0.85 (0.78-0.92); p < 0.001]. Conclusions: female sex, the number of medications and alcohol consumption are independent correlates of RLS in older adults. RLS together with several chronic medical conditions and a low physical activity level were independent correlates of the mobility dimension of the QoL.
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Affiliation(s)
- Magdalena Szklarek
- Department of Geriatrics, Medical University of Lodz, 90-647 Lodz, Poland; (M.S.); (T.K.)
| | - Tomasz Kostka
- Department of Geriatrics, Medical University of Lodz, 90-647 Lodz, Poland; (M.S.); (T.K.)
| | - Joanna Kostka
- Department of Gerontology, Medical University of Lodz, 93-113 Lodz, Poland
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Chenini S, Barateau L, Dauvilliers Y. Restless legs syndrome: From clinic to personalized medicine. Rev Neurol (Paris) 2023; 179:703-714. [PMID: 37689536 DOI: 10.1016/j.neurol.2023.08.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2023]
Abstract
Restless legs syndrome (RLS) is a common neurological sensorimotor disorder that impairs sleep, mood and quality of life. RLS is defined by an urge to move the legs at rest that increases in the evening and at night, and is frequently associated with metabolic and cardiovascular diseases. Symptoms frequency, age at RLS onset, severity, familial history and consequences of RLS vary widely between patients. A genetic susceptibility, iron deficiency, dopamine deregulation, and possible hypo-adenosinergic state may play a role in the pathophysiology of RLS. Polysomnographic recordings found often periodic leg movements during sleep and wakefulness in patients with RLS. RLS can be classified as primary or comorbid with major diseases: iron deficiency, renal, neurological, rheumatological and lung diseases. First-line treatments are low-dose dopamine agonists, and alpha-2-delta ligands depending on the clinical context, and second/third line opiates for pharmacoresistant forms of RLS. Augmentation syndrome is a serious complication of dopamine agonists and should be prevented by using the recommended low dose. Despite an increase in knowledge, RLS is still underdiagnosed, poorly recognized, resulting in substantial individual health burden and socioeconomic coast, and education is urgently needed to increase awareness of this disabling disorder.
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Affiliation(s)
- S Chenini
- National Reference Centre for Orphan Diseases Narcolepsy and Rare Hypersomnias, Sleep Unit, Department of Neurology, CHU Montpellier, University of Montpellier, Montpellier, France; Institute for Neurosciences of Montpellier (INM), University of Montpellier, INSERM, Montpellier, France.
| | - L Barateau
- National Reference Centre for Orphan Diseases Narcolepsy and Rare Hypersomnias, Sleep Unit, Department of Neurology, CHU Montpellier, University of Montpellier, Montpellier, France; Institute for Neurosciences of Montpellier (INM), University of Montpellier, INSERM, Montpellier, France
| | - Y Dauvilliers
- National Reference Centre for Orphan Diseases Narcolepsy and Rare Hypersomnias, Sleep Unit, Department of Neurology, CHU Montpellier, University of Montpellier, Montpellier, France; Institute for Neurosciences of Montpellier (INM), University of Montpellier, INSERM, Montpellier, France.
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3
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Restless Legs Syndrome and Periodic Limb Movements of Sleep: From Neurophysiology to Clinical Practice. J Clin Neurophysiol 2023; 40:215-223. [PMID: 36872500 DOI: 10.1097/wnp.0000000000000934] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023] Open
Abstract
SUMMARY This article summarizes restless legs syndrome (RLS), periodic limb movements of sleep, and periodic limb movement disorder. RLS is a common sleep disorder with a prevalence of 5% to 15% in the general population. RLS can present in childhood, and incidence increases with age. RLS can be idiopathic or secondary to iron deficiency, chronic renal failure, peripheral neuropathy, and medications such as antidepressants (with higher rates for mirtazapine and venlafaxine, while bupropion may reduce symptoms at least in the short term), dopamine antagonists (neuroleptic antipsychotic agents and antinausea medications), and possibly antihistamines. Management includes pharmacologic agents (dopaminergic agents, alpha-2 delta calcium channel ligands, opioids, benzodiazepines) and nonpharmacologic therapies (iron supplementation, behavioral management). Periodic limb movements of sleep are an electrophysiologic finding commonly accompanying RLS. On the other hand, most individuals with periodic limb movements of sleep do not have RLS. The clinical significance of the movements has been argued. Periodic limb movement disorder is a distinct sleep disorder that arises in individuals without RLS and is a diagnosis of exclusion.
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Ning P, Mu X, Yang X, Li T, Xu Y. Prevalence of restless legs syndrome in people with diabetes mellitus: A pooling analysis of observational studies. EClinicalMedicine 2022; 46:101357. [PMID: 35345532 PMCID: PMC8956955 DOI: 10.1016/j.eclinm.2022.101357] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 02/23/2022] [Accepted: 03/03/2022] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Diabetes mellitus (DM) is associated with different clinical complications. The aim of this study was to explore the prevalence of RLS in people with diabetes mellitus and compare the risk of restless leg syndrome (RLS) between diabetic and non-diabetic population. METHODS We searched for studies of RLS prevalence in DM through PubMed, Embase, and Web of Science. Two authors independently completed the literature screening, data extraction, and bias risk assessment of eligible studies. All observational studies that assessed the prevalence or risk of RLS in DM were included, where the diagnosis of RLS was based on the International Restless Legs Syndrome Study Group (IRLSSG). Percentages, odds ratio (OR) with 95% confidence intervals (CI) were used to assess pooled estimates of RLS prevalence and risk based on random-effects models. Newcastle-Ottawa-scale (NOS) or a modified NOS were used to evaluate the quality of studies. FINDINGS A total of 42 studies, including 835,986 participants, met the eligibility criteria for the meta-analysis. Among them, 30 studies were included in meta-analysis to analyze the prevalence of RLS. A second meta-analysis was conducted using 31 studies to determine RLS risk between diabetes and non-diabetes. The results indicate that between 25% (95% confidence interval 21%-29%) of people with diabetes showed signs of RLS, and people with diabetes had an increased risk of developing RLS compare to people without diabetes (OR 1.98, 95%CI 1.66- 2.34, p < 0.001). However, the available evidence was limited due to potential risk of bias and variability between studies (I2 >75%), all of observational design. INTERPRETATION Our study suggests that the prevalence and risk of RLS might be higher in DM patients than in non-diabetes population. However, given limitations in the analysis and study design, the findings need to be corroborated in future studies. FUNDING This work was supported by the Basic Conditions Platform Construction Project of Sichuan Science and Technology Department (2019JDPT0015), and the "1・3・5 project for disciplines of excellence, West China Hospital, Sichuan University" (ZYJC18003).
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Affiliation(s)
- Pingping Ning
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan 610041, PR China
| | - Xin Mu
- Department of Neurology, Chengdu First People's Hospital, 18 Wanxiang North Road, Chengdu, Sichuan 610041, PR China
| | - Xinglong Yang
- Department of Geriatric Neurology, First Affiliated Hospital of Kunming Medical University, 295 Xi Change Road, Kunming, Yunnan 650032, PR China
| | - Tian Li
- School of Basic Medicine, Fourth Military Medical University, No. 169 Changle West Rd, Xi'an 710032, PR China
- Corresponding authors.
| | - Yanming Xu
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan 610041, PR China
- Corresponding authors.
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Weber FC, Danker-Hopfe H, Dogan-Sander E, Frase L, Hansel A, Mauche N, Mikutta C, Nemeth D, Richter K, Schilling C, Sebestova M, Spath MM, Nissen C, Wetter TC. Restless Legs Syndrome Prevalence and Clinical Correlates Among Psychiatric Inpatients: A Multicenter Study. Front Psychiatry 2022; 13:846165. [PMID: 35370821 PMCID: PMC8967168 DOI: 10.3389/fpsyt.2022.846165] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 02/18/2022] [Indexed: 11/13/2022] Open
Abstract
Background There are only limited reports on the prevalence of restless legs syndrome (RLS) in patients with psychiatric disorders. The present study aimed to evaluate the prevalence and clinical correlates in psychiatric inpatients in Germany and Switzerland. Methods This is a multicenter cross-sectional study of psychiatric inpatients with an age above 18 years that were diagnosed and evaluated face-to-face using the International RLS Study Group criteria (IRLSSG) and the International RLS severity scale (IRLS). In addition to sociodemographic and biometric data, sleep quality and mood were assessed using the Pittsburgh Sleep Quality Index (PSQI), the Insomnia Severity Index (ISI), the Epworth Sleepiness Scale (ESS), and the Patient Health Questionnaire (PHQ-9). In addition to univariate statistics used to describe and statistically analyze differences in variables of interest between patients with and without RLS, a logistic model was employed to identify predictors for the occurrence of RLS. Results The prevalence of RLS in a sample of 317 psychiatric inpatients was 16.4%, and 76.9% of these were diagnosed with RLS for the first time. RLS severity was moderate to severe (IRLS ± SD: 20.3 ± 8.4). The prevalences in women (p = 0.0036) and in first-degree relatives with RLS (p = 0.0108) as well as the body mass index (BMI, p = 0.0161) were significantly higher among patients with RLS, while alcohol consumption was significantly lower in the RLS group. With the exception of atypical antipsychotics, treatment with psychotropic drugs was not associated with RLS symptoms. Regarding subjective sleep quality and mood, scores of the PSQI (p = 0.0007), ISI (p = 0.0003), and ESS (p = 0.0005) were higher in patients with RLS, while PHQ-9 scores were not different. A logistic regression analysis identified gender (OR 2.67; 95% CI [1.25; 5.72]), first-degree relatives with RLS (OR 3.29; 95% CI [1.11; 9.73], ESS score (OR 1.09; 95% CI [1.01; 1.17]), and rare alcohol consumption (OR 0.45; 95% CI [0.22; 0.94] as predictors for RLS. Conclusions Clinically significant RLS had a high prevalence in psychiatric patients. RLS was associated with higher BMI, impaired sleep quality, and lower alcohol consumption. A systematic assessment of restless legs symptoms might contribute to improve the treatment of psychiatric patients.
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Affiliation(s)
- Franziska C. Weber
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
| | - Heidi Danker-Hopfe
- Charité-Universitätsmedizin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Competence Center of Sleep Medicine Berlin, Berlin, Germany
| | - Ezgi Dogan-Sander
- Department of Psychiatry and Psychotherapy, University of Leipzig Medical Center, Leipzig, Germany
| | - Lukas Frase
- Department of Psychiatry and Psychotherapy, Medical Center, University of Freiburg – Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Anna Hansel
- Department of Psychiatry and Psychotherapy, Medical Center, University of Freiburg – Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Nicole Mauche
- Department of Psychiatry and Psychotherapy, University Leipzig, Medical Faculty, Leipzig, Germany
| | - Christian Mikutta
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
- Privatklinik Meiringen, Meiringen, Switzerland
| | - Diana Nemeth
- Department of Psychiatry and Psychotherapy, Paracelsus Medical University, Nuremberg, Germany
| | - Kneginja Richter
- Department of Psychiatry and Psychotherapy, Paracelsus Medical University, Nuremberg, Germany
| | - Claudia Schilling
- Central Institute of Mental Health, Department of Psychiatry and Psychotherapy, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | | - Marian M. Spath
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Christoph Nissen
- University Hospital of Psychiatry and Psychotherapy, University of Bern, Bern, Switzerland
| | - Thomas C. Wetter
- Department of Psychiatry and Psychotherapy, University of Regensburg, Regensburg, Germany
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6
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Sum-Ping O, Geng YJ. Impact of Sleep on Cardiovascular Health: A Narrative Review. HEART AND MIND 2022. [DOI: 10.4103/hm.hm_29_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Wang SH, Chen XY, Wang XP. Jidong Restless Legs Syndrome Cohort Study: Objectives, Design, and Baseline Screening. Front Neurol 2021; 12:682448. [PMID: 34721252 PMCID: PMC8548385 DOI: 10.3389/fneur.2021.682448] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 09/07/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Restless legs syndrome (RLS) is a common neurological disorder with unpleasant leg sensations and serious negative effects on mental and physical health. Many observational studies showed that people with RLS had a high risk of vascular diseases, including cerebrovascular and cardiovascular diseases (CVD), but the findings were conflicting. The Jidong RLS Cohort Study is a prospective cohort study designed to mainly examine whether or not RLS is associated with an increased risk of CVD. Methods and Design: The study recruited 8,867 healthy participants older than 18 years from October 2014 to December 2015. Participants received a physical examination in the Staff Hospital, Jidong Oilfield Branch, China National Petroleum Corporation. Baseline data and blood samples were collected. Restless legs syndrome was assessed using the international RLS diagnostic criteria. All of subjects would be followed up until December 2025. Major cardiovascular/cerebrovascular events including cardiac death, myocardial infarction, ischemic heart disease, heart failure, atrial fibrillation, ischemic, and hemorrhagic stroke will be the primary outcomes. Secondary outcomes include all-cause mortality, the decline in quality of life, cognitive impairment, and depression. Discussion: This study will contribute to the scientific evidence on the association between RLS and cardiovascular risks and also provide an unprecedented opportunity for early detection and prevention of CVD.
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Affiliation(s)
- Shu-Hong Wang
- Department of Neurology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xue-Yu Chen
- Department of Biostatistics, Public Health Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Shandong, China
| | - Xiao-Ping Wang
- Department of Neurology, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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8
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Ferri R, Silvani A, Mogavero MP, Rundo F, Bruni O, Picchietti DL, DelRosso LM. Heart rate changes associated with the different types of leg movements during sleep in children, adolescents and adults with restless legs syndrome. J Sleep Res 2021; 30:e13379. [PMID: 33960046 DOI: 10.1111/jsr.13379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 02/24/2021] [Accepted: 04/14/2021] [Indexed: 11/30/2022]
Abstract
The objective of this study was to describe in detail the heart rate changes accompanying short-interval leg movements during sleep, periodic leg movements during sleep, and isolated leg movements during sleep in children and adolescents with restless legs syndrome, and to compare them with the same findings in adults with restless legs syndrome. We analysed time series of R-R intervals synchronized to the onset of short-interval leg movements during sleep, periodic leg movements during sleep or isolated leg movements during sleep that entailed an arousal during non-rapid-eye-movement sleep. We assessed cardiac activation based on the heart rate changes with respect to baseline during non-rapid-eye-movement sleep without leg movements. All types of leg movements recorded during sleep were accompanied by important heart rate changes also in children, with an overall impact similar to that observed in adults. In all age groups, heart rate changes accompanying short-interval leg movements during sleep were constituted by a tachycardia, without a subsequent relative bradycardia, that was instead evident for periodic leg movements during sleep and isolated leg movements during sleep. Moreover, an age-related decline of the relative bradycardia following the heart rate increase, in association with periodic leg movements during sleep and isolated leg movements during sleep, was observed. Our findings show that important heart rate changes accompany all leg movements during sleep at all ages in restless legs syndrome, with significant age-related differences. This information represents an important contribution to the ongoing scientific debate on the possibility and opportunity to treat periodic leg movements during sleep.
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Affiliation(s)
- Raffaele Ferri
- Sleep Research Centre, Department of Neurology I.C., Oasi Research Institute - IRCCS, Troina, Italy
| | - Alessandro Silvani
- Department of Biomedical and Neuromotor Sciences (DIBINEM), University of Bologna, Bologna, Italy
| | - Maria P Mogavero
- Istituti Clinici Scientifici Maugeri, IRCCS, Scientific Institute of Pavia, Pavia, Italy
| | - Francesco Rundo
- Sleep Research Centre, Department of Neurology I.C., Oasi Research Institute - IRCCS, Troina, Italy
| | - Oliviero Bruni
- Department of Social and Developmental Psychology, Sapienza University, Rome, Italy
| | - Daniel L Picchietti
- University of Illinois School of Medicine, Carle Illinois College of Medicine, and Carle Foundation Hospital, Urbana, IL, USA
| | - Lourdes M DelRosso
- Seattle Children's Hospital and University of Washington, Seattle, WA, USA
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Cai H, Wang XP, Yang GY. Sleep Disorders in Stroke: An Update on Management. Aging Dis 2021; 12:570-585. [PMID: 33815883 PMCID: PMC7990374 DOI: 10.14336/ad.2020.0707] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 07/07/2020] [Indexed: 12/18/2022] Open
Abstract
Stroke is a leading cause of disability and mortality all over the world. Due to an aging population, the incidence of stroke is rising significantly, which has led to devastating consequences for patients. In addition to traditional risk factors such as age, hypertension, hyperlipidemia, diabetes and atrial fibrillation, sleep disorders, as independent modifiable risk factors for stroke, have been highlighted increasingly. In this review, we provide an overview of common types of current sleep disturbances in cerebrovascular diseases, including insomnia, hypersomnia, breathing-related sleep disorders, and parasomnias. Moreover, evidence-based clinical therapeutic strategies and pitfalls of specific sleep disorders after stroke are discussed. We also review the neurobiological mechanisms of these treatments as well as their effects on stroke. Since depression after stroke is so prevalent and closely related to sleep disorders, treatments of post-stroke depression are also briefly mentioned in this review article.
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Affiliation(s)
- Hongxia Cai
- 1Department of Neurology, Tong-Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Ping Wang
- 1Department of Neurology, Tong-Ren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guo-Yuan Yang
- 2Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
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Gao X, Ba DM, Bagai K, Liu G, Ma C, Walters AS. Treating Restless Legs Syndrome Was Associated With Low Risk of Cardiovascular Disease: A Cohort Study With 3.4 Years of Follow-Up. J Am Heart Assoc 2021; 10:e018674. [PMID: 33550813 PMCID: PMC7955352 DOI: 10.1161/jaha.120.018674] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background Restless legs syndrome (RLS) is associated with higher cardiovascular disease (CVD) risk. However, it remains unknown whether treatment of RLS lowers the cardiovascular risk associated with RLS. Methods and Results All data were collected retrospectively, but subjects were prospectively followed forward in time to determine outcomes of interest. We used the Truven Health MarketScan Commercial Claims and Encounters database from January 1, 2006, through December 31, 2014. Participants were 169 393 individuals, which included 24 199 nonpregnant participants with an RLS diagnosis (16 694 receiving treatments for RLS and 7505 without treatment) during 2006 to 2008 and 145 194 age- and sex-matched participants without RLS. All participants were free of CVD before January 1, 2009 (analysis baseline). Incident CVD cases (myocardial infarction, angina, stroke, atrial fibrillation, and heart failure) were identified. We adjusted for potential confounders, such as presence of chronic conditions and medication use. We identified 16 574 incident CVD cases during 2009 to 2014. Relative to the non-RLS group, the adjusted hazard ratio (HR) for future CVD was 1.26 (95% CI, 1.20-1.32) (P<0.001) for the RLS with treatment group, and 1.53 (95% CI, 1.42-1.65) (P<0.001) for the RLS without treatment group. Significant lower CVD risk was observed for all different RLS treatments, including dopaminergics, anticonvulsants, benzodiazepines, and opiates (adjusted HRs range, 0.71-0.84; P<0.001 for all), except for ergot-dopamine use. Conclusions RLS was associated with higher future CVD risk. However, RLS was associated with statistically significantly less future cardiovascular risk in RLS patients with treatment than in those without treatment.
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Affiliation(s)
- Xiang Gao
- Department of Nutritional SciencesPenn State UniversityUniversity ParkPA
| | - Djibril M. Ba
- Department of Public Health SciencesPenn State College of MedicineHersheyPA
| | - Kanika Bagai
- Department of NeurologyVanderbilt University Medical CenterNashvilleTN
| | - Guodong Liu
- Department of Public Health SciencesPenn State College of MedicineHersheyPA
| | - Chaoran Ma
- Department of Nutritional SciencesPenn State UniversityUniversity ParkPA
| | - Arthur S. Walters
- Department of NeurologyVanderbilt University Medical CenterNashvilleTN
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11
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Romero-Peralta S, Cano-Pumarega I, García-Borreguero D. Emerging Concepts of the Pathophysiology and Adverse Outcomes of Restless Legs Syndrome. Chest 2020; 158:1218-1229. [PMID: 32247713 DOI: 10.1016/j.chest.2020.03.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 02/15/2020] [Accepted: 03/13/2020] [Indexed: 01/05/2023] Open
Abstract
Restless legs syndrome (RLS), also known as Willis-Ekbom disease (WED), is a common neurological disorder affecting up to 5% to 10% of the population, but it remains an underdiagnosed condition. RLS/WED is characterized by uncomfortable sensations, mainly in the legs, which appear during inactivity and worsen in the evening or at night. The prevalence of RLS/WED and periodic leg movements (PLMs) is increased in patients with sleep-disordered breathing, particularly in those with OSA, the most common sleep disorder encountered in sleep centers. New advances in the pathophysiology of RLS/WED have shown important implications for various genetic markers, neurotransmitter dysfunction, and iron deficiency. A practical approach to RLS/WED management includes an accurate diagnosis, the identification of reversible contributing factors, and the use of nonpharmacological therapies, including iron substitution (oral or IV) therapy. Many pharmacological agents are effective for the treatment of RLS/WED. Until recently, the first-line treatment of RLS/WED consisted of low-dose dopamine agonists (DA). However, given the fact that DAs cause high rates of augmentation of symptoms, international guidelines recommend that whenever possible the initial treatment of choice should be an α2δ ligand, and avoidance of dopaminergic agents unless absolutely necessary. If necessary, the lowest effective dose should be used for only the shortest possible time. The symptoms of RLS/WED can disrupt the quality of sleep as well as the quality of life. IV iron therapy may be considered in patients with refractory RLS. A better understanding of RLS/WED pathophysiology will allow patients to receive tailored therapy, resulting in an improved quality of life.
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Affiliation(s)
- Sofía Romero-Peralta
- Sleep Research Institute, Madrid; Sleep Unit, Respiratory Department, Hospital Universitario Guadalajara, Guadalajara
| | - Irene Cano-Pumarega
- Sleep Research Institute, Madrid; Sleep Unit, Respiratory Department, Hospital Universitario Ramón y, Madrid, Spain
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Abstract
Hypertension is a major determinant of cardiovascular morbidity and mortality and is highly prevalent in the general population. While the relationship between sleep apnea and increased blood pressure has been well documented, less recognized is emerging evidence linking sleep-related movement disorders such as restless legs syndrome/periodic limb movements of sleep and sleep-related bruxism with blood pressure (BP) dysregulation and hypertension. There is also recent literature linking narcolepsy-cataplexy with elevated BP and altered pressor responses, and there are data suggesting abnormal BP control in rapid eye movement sleep behavior disorder. It is thought that neural circulatory mechanisms, sympathetic activation in particular, comprise the predominant mediator underlying elevated BP in these neurological sleep disorders. There is very limited evidence that treating these sleep disorders may be beneficial in lowering BP primarily because this question has received very little attention. In this review, we discuss the potential pathophysiologic mechanisms underlying elevated BP in restless legs syndrome/periodic limb movements of sleep, sleep-related bruxism, narcolepsy-cataplexy, and rapid eye movement sleep behavior disorder. We also examine the relationship between these sleep disorders and elevated BP and the impact of treatment of these conditions on BP control. Last, we discuss gaps in the literature evaluating the associations between these sleep disorders and elevated BP and identify areas for further research.
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Affiliation(s)
- Meghna P. Mansukhani
- Center for Sleep Medicine, Mayo Clinic; Address: 200, First Street SW, Rochester, Minnesota
| | - Naima Covassin
- Department of Cardiovascular Diseases, Mayo Clinic; Address: 200, First Street SW, Rochester, Minnesota
| | - Virend K. Somers
- Department of Cardiovascular Diseases, Mayo Clinic; Address: 200, First Street SW, Rochester, Minnesota
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13
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Evaluation of potential cardiovascular risk protein biomarkers in high severity restless legs syndrome. J Neural Transm (Vienna) 2019; 126:1313-1320. [DOI: 10.1007/s00702-019-02051-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 07/19/2019] [Indexed: 12/22/2022]
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Chiaro G, Manconi M. Restless legs syndrome, periodic limb movements during sleep and cardiovascular risk. Auton Neurosci 2019; 220:102554. [PMID: 31331694 DOI: 10.1016/j.autneu.2019.102554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 05/20/2019] [Accepted: 05/28/2019] [Indexed: 12/16/2022]
Abstract
Multiple mechanisms may modulate an association between restless legs syndrome/Willis-Ekbom disease (RLS/WED) and cardiovascular disease (CVD), including chronic sleep deprivation, intermittent, periodic limb movements in sleep (PLMS)-related autonomic fluctuations and possible autonomic dysfunction intrinsically associated with RLS per se. The purpose of this paper is to review the existing RLS/WED literature focusing on the pathophysiologic evidence for possible associations between RLS/WED and PLMS with CVD and events (CVE). Specific intrinsic dysautonomic aspects of the disease, which may contribute to generating CVD, are separately discussed. The association between RLS/WED and both CV risk factors and CVD still remains elusive. Although several shared pathophysiological causes could explain these possible relationships, the emerging body of literature focusing on these disorders remains controversial. Not only longitudinal population-based studies and meta-analyses, but also more animal models and therapeutic interventions are needed in order to build a sufficiently robust body of evidence on this topic.
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Affiliation(s)
- Giacomo Chiaro
- Sleep and Epilepsy Center, Neurocenter of Southern Switzerland, Civic Hospital of Lugano, Lugano, Switzerland; Department of Biomedical and Neuromotor Sciences, Bellaria Hospital, University of Bologna, Bologna, Italy
| | - Mauro Manconi
- Sleep and Epilepsy Center, Neurocenter of Southern Switzerland, Civic Hospital of Lugano, Lugano, Switzerland; Department of Neurology, Bern University Hospital, Bern, Switzerland.
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Sunwoo JS, Kim WJ, Chu MK, Yang KI. Association between Restless Legs Syndrome Symptoms and Self-Reported Hypertension: a Nationwide Questionnaire Study in Korea. J Korean Med Sci 2019; 34:e130. [PMID: 31020817 PMCID: PMC6484175 DOI: 10.3346/jkms.2019.34.e130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 04/14/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The association between restless legs syndrome (RLS) and hypertension remains controversial. We investigated the relationship between RLS and hypertension in a nationwide sample of the Korean adult population. METHODS This was a cross-sectional questionnaire-based study including 2,740 adults aged 19 years or more. Subjects who met the four essential International RLS Study Group criteria and reported symptoms occurring at least once a week were defined as the RLS group. The presence of hypertension was defined as a self-reported history of physician-diagnosed hypertension. We conducted multiple logistic regression analysis to determine the independent association between RLS symptoms and self-reported hypertension after adjusting for potential confounding factors. RESULTS Among the 2,740 subjects, 68 (2.5%; 95% confidence interval [CI], 1.9%-3.1%) were found to have RLS with a symptom frequency of at least once a week. The prevalence of self-reported hypertension was 30.9% (95% CI, 20.5%-42.0%) in the RLS group, which was significantly higher than that in controls (12.4%; 95% CI, 11.2%-13.6%; P < 0.001). Multiple logistic regression analysis showed that the adjusted odds ratio for self-reported hypertension in the RLS group was 2.10 (95% CI, 1.12-3.93) compared to controls. In addition to RLS symptoms, old age, being overweight, low education level, diabetes mellitus, and short sleep duration were significantly associated with self-reported hypertension. CONCLUSION RLS symptoms occurring at least once a week is independently associated with a higher prevalence of self-reported hypertension in the adult Korean population. Further research will confirm the clinical implication of the present results and the causal relationship between RLS and hypertension.
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Affiliation(s)
- Jun Sang Sunwoo
- Department of Neurology, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
| | - Won Joo Kim
- Department of Neurology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Min Kyung Chu
- Department of Neurology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Kwang Ik Yang
- Sleep Disorders Center, Department of Neurology, Soonchunhyang University Cheonan Hospital, Soonchunhyang University College of Medicine, Cheonan, Korea.
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Szentkirályi A, Stefani A, Hackner H, Czira M, Teismann IK, Völzke H, Stubbe B, Gläser S, Ewert R, Penzel T, Fietze I, Young P, Högl B, Berger K. Prevalence and associated risk factors of periodic limb movement in sleep in two German population-based studies. Sleep 2018; 42:5248299. [DOI: 10.1093/sleep/zsy237] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 09/30/2018] [Indexed: 11/12/2022] Open
Affiliation(s)
- András Szentkirályi
- Institute of Epidemiology and Social Medicine, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Ambra Stefani
- Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
| | - Heinz Hackner
- Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
| | - Maria Czira
- Institute for Sleep Medicine and Neuromuscular Disorders, Münster University Hospital, Münster, Germany
| | - Inga K Teismann
- Institute for Sleep Medicine and Neuromuscular Disorders, Münster University Hospital, Münster, Germany
| | - Henry Völzke
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
- German Centre for Cardiovascular Research, Partner Site Greifswald, Greifswald, Germany
| | - Beate Stubbe
- Department of Internal Medicine B, University Hospital Greifswald, Greifswald, Germany
| | - Sven Gläser
- Department of Internal Medicine B, University Hospital Greifswald, Greifswald, Germany
- Vivantes Klinikum Berlin Spandau, Department of Internal Medicine and Pulmonary Diseases, Berlin, Germany
| | - Ralf Ewert
- Department of Internal Medicine B, University Hospital Greifswald, Greifswald, Germany
| | - Thomas Penzel
- Sleep Centre, University Hospital Charité Berlin, Berlin, Germany
| | - Ingo Fietze
- Sleep Centre, University Hospital Charité Berlin, Berlin, Germany
| | - Peter Young
- Institute for Sleep Medicine and Neuromuscular Disorders, Münster University Hospital, Münster, Germany
| | - Birgit Högl
- Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
| | - Klaus Berger
- Institute of Epidemiology and Social Medicine, Westfälische Wilhelms-Universität Münster, Münster, Germany
- Department of Internal Medicine B, University Hospital Greifswald, Greifswald, Germany
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17
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Comorbidities, treatment, and pathophysiology in restless legs syndrome. Lancet Neurol 2018; 17:994-1005. [PMID: 30244828 DOI: 10.1016/s1474-4422(18)30311-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/05/2018] [Accepted: 08/08/2018] [Indexed: 12/11/2022]
Abstract
Restless legs syndrome, also known as Willis-Ekbom disease, is a common neurological condition whose manifestation is affected by complex environmental and genetic interactions. Restless legs syndrome can occur on its own, mostly at a young age, or with comorbidities such as cardiovascular disease, diabetes, and arterial hypertension, making it a difficult condition to properly diagnose. However, the concept of restless legs syndrome as being two entities, primary or secondary to another condition, has been challenged with genetic data providing further insight into the pathophysiology of the condition. Although dopaminergic treatment was formerly the first-line therapy, prolonged use can result in a serious worsening of symptoms known as augmentation. Clinical studies on pregabalin, gabapentin enacarbil, oxycodone-naloxone, and iron preparations have provided new treatment options, but most patients still report inadequate long-term management of symptoms. Studies of the hypoxic pathway activation and iron deficiency have provided valuable information about the pathophysiology of restless legs syndrome that should now be translated into new, more effective treatments for restless legs syndrome.
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Duss SB, Brill AK, Bargiotas P, Facchin L, Alexiev F, Manconi M, Bassetti CL. Sleep-Wake Disorders in Stroke—Increased Stroke Risk and Deteriorated Recovery? An Evaluation on the Necessity for Prevention and Treatment. Curr Neurol Neurosci Rep 2018; 18:72. [DOI: 10.1007/s11910-018-0879-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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19
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Hwang IC, Na KS, Lee YJ, Kang SG. Higher Prevalence of Hypertension among Individuals with Restless Legs Syndrome: A Meta-Analysis. Psychiatry Investig 2018; 15:701-709. [PMID: 29898579 PMCID: PMC6056689 DOI: 10.30773/pi.2018.02.26] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 01/14/2018] [Accepted: 02/26/2018] [Indexed: 12/22/2022] Open
Abstract
OBJECTIVE This study investigated the proposed association between restless legs syndrome (RLS) and the prevalence of hypertension. METHODS A meta-analysis was conducted based on searches of the PUBMED, EMBASE, Cochrane Library, and Korean electronic databases. Cohort and cross-sectional studies reporting the incidence of hypertension in individuals with RLS were included. Dichotomous data were pooled to obtain an odds ratio (OR) and 95% confidence interval (CI) for the prevalence of hypertension in individuals with RLS. The main outcome measure of the study was prevalence of hypertension in patients with RLS compared with a control group. RESULTS One cohort study and eight cross-sectional studies were included in the meta-analysis. Individuals with RLS had an increased prevalence of hypertension (all studies: OR=1.13, 95% CI=1.04-1.23; cross-sectional studies: OR=1.12, 95% CI=1.01-1.24). However, in subgroup analyses controlling for cardiovascular risk factors, such as diabetes mellitus and dyslipidemia, the differences in the prevalence of hypertension between RLS and control patients were no longer significant. CONCLUSION Patients with RLS may have a higher prevalence of hypertension, according to a pooled analysis, but the results remain to be confirmed in well-designed prospective studies.
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Affiliation(s)
- In Cheol Hwang
- Department of Family Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Kyoung-Sae Na
- Department of Psychiatry, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
| | - Yu Jin Lee
- Department of Psychiatry and Center for Sleep and Chronobiology, Seoul National University College of Medicine and Hospital, Seoul, Republic of Korea
| | - Seung-Gul Kang
- Department of Psychiatry, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea
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20
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Abstract
INTRODUCTION Stroke is a major cause of disability and death in the United States and across the world, and the incidence and prevalence of stroke are expected to rise significantly due to an aging population. Obstructive sleep apnea, an established independent risk factor for stroke, is a highly prevalent disease that is estimated to double the risk of stroke. It remains uncertain whether non-apnea sleep disorders increase the risk of stroke. Areas covered: This paper reviews the literature describing the association between incident stroke and sleep apnea, rapid eye movement sleep behavior disorder, restless legs syndrome, periodic limb movements of sleep, insomnia, and shift work. Expert commentary: Trials of continuous positive airway pressure for stroke prevention in sleep apnea patients have been largely disappointing, but additional trials that target populations not yet optimally studied are needed. Self-reported short and long sleep duration may be associated with incident stroke. However, abnormal sleep duration may be a marker of chronic disease, which may itself be associated with incident stroke. The relationship between non-apnea sleep disorders and incident stroke deserves further attention. Identification of specific non-apnea sleep disorders or sleep problems that convey an increased risk for stroke may provide novel targets for stroke prevention.
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Affiliation(s)
- Mollie McDermott
- a Michigan Medicine Stroke Program , Cardiovascular Center , Ann Arbor , MI , USA
| | - Devin L Brown
- a Michigan Medicine Stroke Program , Cardiovascular Center , Ann Arbor , MI , USA.,b Michigan Medicine , Michael S. Aldrich Sleep Disorders Laboratory , Ann Arbor , MI , USA
| | - Ronald D Chervin
- a Michigan Medicine Stroke Program , Cardiovascular Center , Ann Arbor , MI , USA
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21
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Didriksen M, Hansen TF, Thørner LW, Burgdorf KS, Erikstrup C, Pedersen OB, Paarup HM, Nielsen KR, Hjalgrim H, Sørensen E, Ullum H. Restless legs syndrome is associated with increased risk of migraine. CEPHALALGIA REPORTS 2018. [DOI: 10.1177/2515816318780743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Migraine and restless legs syndrome (RLS) are common disorders that are associated with a high level of individual suffering and major comorbidities. The aetiologies of the disorders are largely unknown, although both migraine and RLS have been linked to disturbances in the dopaminergic system and sleep issues, suggesting a relationship between the disorders. This study examines the association between RLS and migraine in a large population of otherwise healthy adults who are not taking medication. Cross-sectional study that included 20,938 participants enrolled in the Danish Blood Donor Study from 1 May 2015 to 1 February 2017. The study included complete information on migraines, the Cambridge-Hopkins RLS questionnaire, the Major Depression Inventory Scale, sex, age, body mass index (BMI), educational level, smoking status and alcohol consumption. Associations between RLS and migraine, with and without aura, were examined using multivariable logistic regression analysis. Among the participants, 4827 were self-reported migraine sufferers and 1091 were classified as suffering from RLS. Individuals with RLS had an increased risk of migraine compared to non-RLS sufferers, with an odds ratio (OR) = 1.52 (95% confidence interval: 1.33–1.73). For the investigated subtypes of migraine, this association was found to be OR = 1.55 (1.31–1.83) for migraines with aura and OR = 1.29 (1.09–1.52) for migraines without aura. We found a significantly increased occurrence of migraine in individuals with RLS. This risk was independent of sex, age, BMI, educational level, smoking status, alcohol consumption and depressive disorder. Our findings suggest that RLS and migraine may have a common aetiology.
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Affiliation(s)
- Maria Didriksen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Thomas F Hansen
- Department of Neurology, Danish Headache Center, Glostrup Research Institute, Copenhagen University Hospital Rigshospitalet-Glostrup, Glostrup, Denmark
| | - Lise W Thørner
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Kristoffer S Burgdorf
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Christian Erikstrup
- Department of Clinical Immunology, Aarhus University Hospital, Aarhus, Denmark
| | - Ole B Pedersen
- Department of Clinical Immunology, Naestved Hospital, Naestved, Denmark
| | - Helene M Paarup
- Department of Clinical Immunology, Odense University Hospital, Odense, Denmark
| | - Kaspar R Nielsen
- Department of Clinical Immunology, Aalborg University Hospital, Aalborg, Denmark
| | - Henrik Hjalgrim
- Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark
- Department of Haematology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Erik Sørensen
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Henrik Ullum
- Department of Clinical Immunology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
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22
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Liu Y, Liu G, Li L, Yang J, Ma S. Evaluation of Cardiovascular Risk Factors and Restless Legs Syndrome in Women and Men: A Preliminary Population-Based Study in China. J Clin Sleep Med 2018; 14:445-450. [PMID: 29458704 DOI: 10.5664/jcsm.6996] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 12/12/2017] [Indexed: 02/04/2023]
Abstract
STUDY OBJECTIVES Many studies have investigated the association between restless legs syndrome (RLS) and cardiovascular risk factors, leading to conflicting results. Therefore, the aim of the current study was to determine whether RLS is associated with cardiovascular risk factors and disease. METHODS This cross-sectional study included 5,324 consecutive subjects who visited the Physical Examination Center of The First Affiliated Hospital of Zhengzhou University for their yearly routine physical examination. Participants underwent a face-to-face interview with a neurologist for the assessment of RLS, based on the International Restless Legs Study Group criteria. They also completed a questionnaire related to cardiovascular risk factors and other health-related and demographic information. Logistic regression was used to assess which of the demographic and cardiovascular risk factors increased the odds of RLS. Then, unadjusted and adjusted models were designed to determine whether RLS was associated with increased odds of cardiovascular disease, coronary artery disease, or hypertension. RESULTS RLS was observed in 9.2% of the participants. Multivariable logistic regression models, which included the covariates age, sex, body mass index, smoking status, hypercholesterolemia, and Pittsburgh Sleep Quality Index score (dichotomized at 5), demonstrated that female sex (odds ratio [OR]: 2.42, 95% confidence interval [CI]: 1.99-2.95), smoking (OR: 1.96, 95% CI: 1.31-2.92), high cholesterol (OR: 1.30, 95% CI: 1.03-1.64), and PSQI score > 5 (OR: 5.61, 95% CI: 2.14-14.69) are significantly associated with RLS. Additionally, RLS was associated with hypertension, after adjusting for age, sex, body mass index, smoking, hypercholesterolemia, Pittsburgh Sleep Quality Index score > 5, diabetes, anemia, and decreased renal function. CONCLUSIONS RLS is associated with the prevalence of hypertension but not with that of cardiovascular disease or coronary artery disease.
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Affiliation(s)
- Yuqiong Liu
- Department of Pathology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China.,Department of Pathology, School of Basic Medicine, Zhengzhou University, Zhengzhou, People's Republic of China
| | - Gangqiong Liu
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Ling Li
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Jing Yang
- Department of Cardiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China.,Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Shengli Ma
- Department of Emergency, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
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23
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Congiu P, Puligheddu M, Figorilli M, Ferri R. Periodic Leg Movements During Sleep and Cardiovascular and/or Cerebrovascular Morbidity. CURRENT SLEEP MEDICINE REPORTS 2018. [DOI: 10.1007/s40675-018-0101-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Koo DL, Nam H, Thomas RJ, Yun CH. Sleep Disturbances as a Risk Factor for Stroke. J Stroke 2018; 20:12-32. [PMID: 29402071 PMCID: PMC5836576 DOI: 10.5853/jos.2017.02887] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/07/2018] [Accepted: 01/15/2018] [Indexed: 12/30/2022] Open
Abstract
Sleep, a vital process of human being, is carefully orchestrated by the brain and consists of cyclic transitions between rapid eye movement (REM) and non-REM (NREM) sleep. Autonomic tranquility during NREM sleep is characterized by vagal dominance and stable breathing, providing an opportunity for the cardiovascular-neural axis to restore homeostasis, in response to use, distress or fatigue inflicted during wakefulness. Abrupt irregular swings in sympathovagal balance during REM sleep act as phasic loads on the resting cardiovascular system. Any causes of sleep curtailment or fragmentation such as sleep restriction, sleep apnea, insomnia, periodic limb movements during sleep, and shift work, not only impair cardiovascular restoration but also impose a stress on the cardiovascular system. Sleep disturbances have been reported to play a role in the development of stroke and other cardiovascular disorders. This review aims to provide updated information on the role of abnormal sleep in the development of stroke, to discuss the implications of recent research findings, and to help both stroke clinicians and researchers understand the importance of identification and management of sleep pathology for stroke prevention and care.
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Affiliation(s)
- Dae Lim Koo
- Department of Neurology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Hyunwoo Nam
- Department of Neurology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Robert J Thomas
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Chang-Ho Yun
- Department of Neurology, Bundang Clinical Neuroscience Institute, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
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Alsafadi S, Abaalkhail B, Wali SO, Aljammali K, Alotaiby B, Zakaria I, Sabbahi H. Risk factors of primary and secondary restless legs syndrome among a middle-aged population in Saudi Arabia: A community-based study. Ann Thorac Med 2018; 13:175-181. [PMID: 30123337 PMCID: PMC6073788 DOI: 10.4103/atm.atm_344_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
INTRODUCTION: Restless legs syndrome (RLS) is etiologically divided into primary and secondary syndromes. However, a comparative description of both types is lacking in the literature. We compared primary and secondary RLS with respect to demographic determinants, associated risk factors, and comorbidities. METHODS: Following a cross-sectional survey on the prevalence of RLS in a Saudi population, RLS cases were identified using the International RLS Study Group (IRLSSG) criteria. Cases were assessed with an interview-based questionnaire regarding baseline characteristics, risk factors, and comorbidities and with lower limb examinations and laboratory measurements. RLS severity was assessed using the IRLSSG Severity Rating Scale. RESULTS: In total, 78 patients with RLS, including 50 (64.1%) primary and 28 (35.9%) secondary cases, were examined. Of the primary cases, 35 (70%) were male; of the secondary cases, 25 (89.3%) were female (P < 0.001). Multivariate regression confirmed the association of male gender with primary RLS (odds ratio = 14.53, 95% confidence interval [2.9–75], P = 0.001). There were more dark- and black-skinned participants in the primary RLS group (38, 72%) than in the secondary group (15, 28%) (P = 0.042). Iron deficiency was observed in most (26, 92%) of the secondary cases. More severe symptoms were reported in secondary than in primary RLS cases (P < 0.05). CONCLUSIONS: Primary RLS is more common but less severe than secondary RLS. Male gender and ethnicity play significant roles in primary RLS, whereas female gender and iron deficiency may be the main risk factors associated with secondary RLS.
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Affiliation(s)
- Samah Alsafadi
- Department of Family and Community Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Bahaa Abaalkhail
- Department of Family and Community Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Siraj Omar Wali
- Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Khaled Aljammali
- Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Bedor Alotaiby
- Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Ibrahim Zakaria
- Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Hanadi Sabbahi
- Sleep Medicine and Research Center, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
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Didriksen M, Rigas AS, Allen RP, Burchell BJ, Di Angelantonio E, Nielsen MH, Jennum P, Werge T, Erikstrup C, Pedersen OB, Bruun MT, Burgdorf KS, Sørensen E, Ullum H. Prevalence of restless legs syndrome and associated factors in an otherwise healthy population: results from the Danish Blood Donor Study. Sleep Med 2017; 36:55-61. [DOI: 10.1016/j.sleep.2017.04.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 12/27/2022]
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Dunietz GL, Lisabeth LD, Shedden K, Shamim-Uzzaman QA, Bullough AS, Chames MC, Bowden MF, O'Brien LM. Restless Legs Syndrome and Sleep-Wake Disturbances in Pregnancy. J Clin Sleep Med 2017. [PMID: 28633715 DOI: 10.5664/jcsm.6654] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
STUDY OBJECTIVES To estimate the association of restless legs syndrome (RLS) and its frequency with sleep-wake disturbances in pregnancy. METHODS A cohort of 1,563 women in their third trimester of pregnancy were recruited from prenatal clinics between March 2007 and December 2010. Demographic, pregnancy, and delivery data were extracted from medical records and sleep information was collected with questionnaires. To diagnose RLS, we used standardized criteria of RLS symptoms and frequency that were developed by the International Restless Legs Study Group. Logistic regression models were constructed to investigate the association of RLS and its frequency with sleep-wake disturbances (poor sleep quality, daytime sleepiness, poor daytime function) and delivery outcomes. RESULTS Overall 36% of the pregnant women had RLS, and half had moderate to severe symptoms. Compared to women without RLS, those with RLS were more likely to have poor sleep quality (odds ratio [OR] 2.2, 95% confidence interval [CI] 1.7-2.9), poor daytime function (OR 1.9, 95% CI 1.4-2.4), and excessive daytime sleepiness (OR 1.6, 95% CI 1.3-2.0). A dose-response relationship also was evident between RLS frequency and each of the sleep-wake disturbances. There was no evidence for any association between RLS and delivery outcomes. CONCLUSIONS RLS is a significant contributor to poor sleep quality, daytime sleepiness, and poor daytime function, all common and often debilitating conditions in pregnancy. Obstetric health care providers should be aware of these associations and screen women for RLS. COMMENTARY A commentary on this article appears in this issue on page 857.
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Affiliation(s)
| | | | | | | | | | - Mark C Chames
- Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan
| | | | - Louise M O'Brien
- Sleep Disorders Center, Department of Neurology.,Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan
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28
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Szentkirályi A, Völzke H, Hoffmann W, Dörr M, Hense HW, Berger K. Ankle-brachial index and peripheral artery disease are not related to restless legs syndrome. Sleep Med 2017; 35:74-79. [PMID: 28619186 DOI: 10.1016/j.sleep.2017.04.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 04/11/2017] [Accepted: 04/12/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Our aim was to investigate the relationship between impaired peripheral arterial circulation as measured by ankle-brachial index (ABI) and restless legs syndrome (RLS) in the general population. METHODS Data are derived from three independent, German population-based, prospective studies: the control sample of BiDirect (N = 966), the second follow-up of SHIP (N = 2333), and a subsample of SHIP-Trend (N = 1269). RLS was assessed with questions based on the RLS minimal criteria. ABI was measured with an automated method in BiDirect and with Doppler ultrasound in both SHIP studies. An ABI score below 0.9 was indicative of peripheral arterial disease (PAD). Co-morbidities, medications and behavioural factors were self-reported. Additional measurements included body mass index and haemoglobin from blood serum. For BiDirect, a follow-up with identical methodology was performed after a median of 2.5 years. RESULTS In cross-sectional analyses, decreased ABI was not significantly associated with RLS as outcome in multivariable logistic regression models adjusted for several potential confounders (BiDirect: odds ratio (OR) = 1.07 for a -0.1 change in ABI, 95% confidence interval (CI): 0.81-1.42, p = 0.62; SHIP-2: OR = 0.99, CI: 0.85-1.16, p = 0.94; SHIP-Trend: OR = 0.99, CI: 0.87-1.13, p = 0.88). Similar non-significant results were achieved using PAD (instead of ABI) as an independent variable. In BiDirect, baseline ABI was not a significant predictor of incident RLS in longitudinal analysis (OR = 0.77, CI: 0.53-1.12, p = 0.17). CONCLUSION Results from three independent studies suggest that reduced ABI is not a risk factor for RLS in the general population.
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Affiliation(s)
- A Szentkirályi
- Institute of Epidemiology and Social Medicine, Westfälische Wilhelms-Universität Münster, Germany.
| | - H Völzke
- Institute for Community Medicine, University Medicine Greifswald, Germany; German Centre for Cardiovascular Research (DZHK), Partner Site Greifswald, Germany
| | - W Hoffmann
- Institute for Community Medicine, University Medicine Greifswald, Germany; German Centre for Neurodegenerative Diseases (DZNE), Rostock/Greifswald, Germany
| | - M Dörr
- German Centre for Cardiovascular Research (DZHK), Partner Site Greifswald, Germany; Department of Internal Medicine B, University Medicine Greifswald, Germany
| | - H W Hense
- Institute of Epidemiology and Social Medicine, Westfälische Wilhelms-Universität Münster, Germany
| | - K Berger
- Institute of Epidemiology and Social Medicine, Westfälische Wilhelms-Universität Münster, Germany; German Centre for Diabetes Research, Partner Site Münster, Germany
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Cholley-Roulleau M, Chenini S, Béziat S, Guiraud L, Jaussent I, Dauvilliers Y. Restless legs syndrome and cardiovascular diseases: A case-control study. PLoS One 2017; 12:e0176552. [PMID: 28445539 PMCID: PMC5406016 DOI: 10.1371/journal.pone.0176552] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 04/12/2017] [Indexed: 01/18/2023] Open
Abstract
Objective The association between restless legs syndrome (RLS), cardiovascular diseases (CVD) and hypertension is inconsistent. This case-control study examined i) the association between primary RLS, CVD and hypertension by taking into account many potential confounders and ii) the influence of RLS duration, severity and treatment, sleep and depressive symptoms on CVD and hypertension in primary RLS. Methods A standardized questionnaire to assess the RLS phenotype, history of CVD and hypertension, sleep and depressive symptoms, drug intake and demographic/clinical features was sent to the France-Ekbom Patients Association members. A CVD event was defined as a self-reported history of coronary heart disease, heart failure, arrhythmia or stroke. Hypertension was also self-assessed. Current treatment for hypertension and arrhythmia also defined underlying hypertension and arrhythmia. Controls without RLS and without consanguinity were chosen by the patients. Results 487 patients with primary RLS (median age 71 years; 67.4% women) and 354 controls (68 years, 47.7% women) were included. Most of the patients (91.7%) were treated for RLS, especially with dopaminergic agonists. The median age of RLS onset was 45 years. CVD and hypertension were associated with RLS in unadjusted association, but not after adjustment for age, sex and body mass index. Patients with RLS and with CVD and/or hypertension were significantly older, with hypercholesterolemia, sleep apnea and older age at RLS and at daily RLS onset compared with patients without CVD and/or hypertension. No significant difference was found for other RLS features, ferritin levels, daytime sleepiness, insomnia and depressive symptoms. Conclusion Despite some limitations in the design of this study, we found that most of the treated patients for primary RLS had no association with CVD and hypertension after controlling for key potential confounders. Comorbid CVD or hypertension was associated with cardiovascular risk factors, but not with RLS features except for older age at onset.
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Affiliation(s)
| | - Sofiene Chenini
- Unité des Troubles du Sommeil, Neurologie, Hôpital Gui-de-Chauliac, Montpellier, France
| | - Séverine Béziat
- Inserm, U1061, Montpellier, France
- Université Montpellier, Montpellier, France
| | - Lily Guiraud
- Unité des Troubles du Sommeil, Neurologie, Hôpital Gui-de-Chauliac, Montpellier, France
| | - Isabelle Jaussent
- Inserm, U1061, Montpellier, France
- Université Montpellier, Montpellier, France
| | - Yves Dauvilliers
- Unité des Troubles du Sommeil, Neurologie, Hôpital Gui-de-Chauliac, Montpellier, France
- Inserm, U1061, Montpellier, France
- Université Montpellier, Montpellier, France
- * E-mail:
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Winkelman JW, Blackwell T, Stone K, Ancoli-Israel S, Redline S. Associations of Incident Cardiovascular Events With Restless Legs Syndrome and Periodic Leg Movements of Sleep in Older Men, for the Outcomes of Sleep Disorders in Older Men Study (MrOS Sleep Study). Sleep 2017; 40:2982980. [PMID: 28199705 PMCID: PMC5806566 DOI: 10.1093/sleep/zsx023] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Study Objectives Both restless legs syndrome (RLS) and periodic leg movements in sleep (PLMS) may be associated with incident cardiovascular disease (CVD). However, the individual contributions of these factors to adverse CVD outcomes are unknown. Methods During the MrOS Sleep Study, 2823 men (mean age = 76.3 years) participated in a comprehensive sleep assessment from 2000 to 2002. RLS was identified by self-report of a physician diagnosis of RLS. A periodic limb movement of sleep index (PLMI) was derived from unattended in-home polysomnography. Incident cardiovascular events were centrally adjudicated during 8.7 ± 2.6 years of follow-up. The primary outcome was all-cause CVD; secondary outcomes included incident myocardial infarction (MI) and cerebrovascular disease. Cox proportional hazards regression models were adjusted for multiple covariates, including PLMI, to examine if there were independent associations of RLS and PLMI to the outcomes. Results Physician-diagnosed RLS was reported by 2.2% and a PLMI ≥ 15 was found in 59.6% of men. RLS was not associated with the composite CVD outcome. RLS was significantly associated with incident MI (Hazard ratio [HR] = 2.02, 95% CI, 1.04-3.91) even after adjustment for multiple covariates. Results were only modestly attenuated when PLMI was added to the model. PLMI also was found to predict incident MI (per SD increase in PLMI, HR = 1.14, 95% CI, 1.00-1.30, p = .05), and was materially unchanged after addition of RLS. Conclusions The independent risk that RLS confers for MI suggests a role for non-PLMS factors such as sleep disturbance, shared genetic factors, or PLM-independent sympathetic hyperactivity.
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Affiliation(s)
- John W Winkelman
- Departments of Psychiatry and Neurology, Massachusetts General Hospital, Harvard Medical School,Boston, MA
| | - Terri Blackwell
- Research Institute, California Pacific Medical Center, San Francisco, CA
| | - Katie Stone
- Research Institute, California Pacific Medical Center, San Francisco, CA
| | - Sonia Ancoli-Israel
- Departments of Psychiatry and Medicine, University of California, San Diego, CA
| | - Susan Redline
- Departments of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
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Fereshtehnejad SM, Rahmani A, Shafieesabet M, Soori M, Delbari A, Motamed MR, Lökk J. Prevalence and associated comorbidities of restless legs syndrome (RLS): Data from a large population-based door-to-door survey on 19176 adults in Tehran, Iran. PLoS One 2017; 12:e0172593. [PMID: 28212408 PMCID: PMC5315310 DOI: 10.1371/journal.pone.0172593] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 02/07/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Discrepancies have been reported in the prevalence rate of restless legs syndrome (RLS) among different ethnic groups and geographic populations. Furthermore, there are disagreements on determinant factors and associated comorbidities of RLS. We aimed to estimate prevalence of RLS and investigate its associated comorbid conditions and risk factors in a large population-based door-to-door survey. METHODS Following a multistage random sampling from the households lived in 22 urban districts of Tehran, Iran, 19176 participants with ≥30 years of age were recruited. Trained surveyors filled study checklist consisting of baseline characteristics, risk factors and comorbidity profile and the International RLS Study Group (IRLSSG) diagnostic criteria through face-to-face interviews. RESULTS In total, 1580 individuals were positively screened for RLS resulting in a standardized prevalence rate of 60.0/1000. There was a gradual increase in RLS prevalence by advancing age, however, sex difference disappeared after adjustment. Parkinsonism [adjusted odds' ratio (adj-OR) = 7.4 (95% CI: 5.3-10.4)], peripheral neuropathy [adj-OR = 3.7 (95% CI: 3.3-4.1)], subjective cognitive impairment (SCI) [adj-OR = 3.1 (95% CI: 2.7-3.4)], acting out dreams [adj-OR = 2.8 (95% CI: 2.5-3.2)], hyposmia [adj-OR = 2.5 (95% CI: 2.2-2.9)], active smoking [adj-OR = 1.5 (95% CI: 1.3-1.9)] and additional number of cardiometabolic diseases associated with higher risk of RLS [adj-OR = 1.6 (95% CI: 1.2-2.3)]. CONCLUSION Our findings showed that neuro-cognitive co-morbidities such as parkinsonism, peripheral neuropathy, SCI, acting out dreams and hyposmia as well as cardio-metabolic risk factors and diseases were independent determinants of RLS. It is recommended to screen individuals with either these comorbid conditions for RLS or the ones with RLS for the accompanying diseases.
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Affiliation(s)
- Seyed-Mohammad Fereshtehnejad
- Division of Clinical geriatrics, Department of Neurobiology, Care Sciences, and Society (NVS), Karolinska Institutet, Stockholm, Sweden
- Department of Neurology and Neurosurgery, Faculty of Medicine, McGill University, Montreal General Hospital, Montreal, Québec, Canada
- Firoozgar Clinical Research Development Center (FCRDC), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran
- * E-mail:
| | - Arash Rahmani
- Medical Student Research Committee (MSRC), Mental Health Research Center, Tehran Psychiatry Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Mahdiyeh Shafieesabet
- Medical Student Research Committee (MSRC), Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mahshid Soori
- Medical Student Research Committee (MSRC), Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Delbari
- Division of Clinical geriatrics, Department of Neurobiology, Care Sciences, and Society (NVS), Karolinska Institutet, Stockholm, Sweden
- Iranian Research Center on Aging, University of Social Welfare and Rehabilitation, Tehran, Iran
| | - Mohammad Reza Motamed
- Firoozgar Clinical Research Development Center (FCRDC), Firoozgar Hospital, Iran University of Medical Sciences, Tehran, Iran
- Neurology Department, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Johan Lökk
- Division of Clinical geriatrics, Department of Neurobiology, Care Sciences, and Society (NVS), Karolinska Institutet, Stockholm, Sweden
- Department of Geriatric Medicine, Karolinska University Hospital, Stockholm, Sweden
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Kendzerska T, Kamra M, Murray BJ, Boulos MI. Incident Cardiovascular Events and Death in Individuals With Restless Legs Syndrome or Periodic Limb Movements in Sleep: A Systematic Review. Sleep 2017; 40:2979287. [DOI: 10.1093/sleep/zsx013] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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Duss SB, Seiler A, Schmidt MH, Pace M, Adamantidis A, Müri RM, Bassetti CL. The role of sleep in recovery following ischemic stroke: A review of human and animal data. Neurobiol Sleep Circadian Rhythms 2016; 2:94-105. [PMID: 31236498 PMCID: PMC6575180 DOI: 10.1016/j.nbscr.2016.11.003] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 11/04/2016] [Accepted: 11/07/2016] [Indexed: 01/02/2023] Open
Abstract
Despite advancements in understanding the pathophysiology of stroke and the state of the art in acute management of afflicted patients as well as in subsequent neurorehabilitation training, stroke remains the most common neurological cause of long-term disability in adulthood. To enhance stroke patients’ independence and well-being it is necessary, therefore, to consider and develop new therapeutic strategies and approaches. We postulate that sleep might play a pivotal role in neurorehabilitation following stroke. Over the last two decades compelling evidence for a major function of sleep in neuroplasticity and neural network reorganization underlying learning and memory has evolved. Training and learning of new motor skills and knowledge can modulate the characteristics of subsequent sleep, which additionally can improve memory performance. While healthy sleep appears to support neuroplasticity resulting in improved learning and memory, disturbed sleep following stroke in animals and humans can impair stroke outcome. In addition, sleep disorders such as sleep disordered breathing, insomnia, and restless legs syndrome are frequent in stroke patients and associated with worse recovery outcomes. Studies investigating the evolution of post-stroke sleep changes suggest that these changes might also reflect neural network reorganization underlying functional recovery. Experimental and clinical studies provide evidence that pharmacological sleep promotion in rodents and treatment of sleep disorders in humans improves functional outcome following stroke. Taken together, there is accumulating evidence that sleep represents a “plasticity state” in the process of recovery following ischemic stroke. However, to test the key role of sleep and sleep disorders for stroke recovery and to better understand the underlying molecular mechanisms, experimental research and large-scale prospective studies in humans are necessary. The effects of hospital conditions, such as adjusting light conditions according to the patients’ sleep-wake rhythms, or sleep promoting drugs and non-invasive brain stimulation to promote neuronal plasticity and recovery following stroke requires further investigation. Sleep fosters neuroplasticity improving learning and memory. Recovery after stroke results from functional and structural reorganization of damaged brain circuits due to neuroplasticity. Animal and human data provide evidence that promotion of sleep (and treatment of sleep disorders) is neuroprotective in the acute phase of stroke and promotes neuroplasticity and by this recovery after stroke. A better understanding of the molecular mechanisms underlying the interactions between sleep and stroke is expected to offer new pharmacological and non-pharmacological opportunities to improve recovery of patients with stroke.
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Affiliation(s)
- Simone B Duss
- Sleep-Wake-Epilepsy-Center, Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - Andrea Seiler
- Sleep-Wake-Epilepsy-Center, Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - Markus H Schmidt
- Sleep-Wake-Epilepsy-Center, Department of Neurology, Bern University Hospital, Bern, Switzerland.,Center for Experimental Neurology (ZEN), Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - Marta Pace
- Center for Experimental Neurology (ZEN), Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - Antoine Adamantidis
- Center for Experimental Neurology (ZEN), Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - René M Müri
- Division of Cognitive and Restorative Neurology, Department of Neurology, Bern University Hospital, Bern, Switzerland
| | - Claudio L Bassetti
- Sleep-Wake-Epilepsy-Center, Department of Neurology, Bern University Hospital, Bern, Switzerland.,Center for Experimental Neurology (ZEN), Department of Neurology, Bern University Hospital, Bern, Switzerland.,Division of Cognitive and Restorative Neurology, Department of Neurology, Bern University Hospital, Bern, Switzerland
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Restless legs syndrome and cardiovascular disease: a research roadmap. Sleep Med 2016; 31:10-17. [PMID: 28065687 DOI: 10.1016/j.sleep.2016.08.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 08/30/2016] [Accepted: 08/31/2016] [Indexed: 12/14/2022]
Abstract
In this paper, we first critically appraise the epidemiologic literature examining the association of restless legs syndrome (RLS) with cardiovascular disease (CVD) and then consider whether lessons learned from the study of cardiovascular consequences of other sleep disorders might inform a research agenda to examine the potential mechanisms of cardiovascular morbidity of RLS. Cross-sectional and longitudinal studies are both mixed as to whether there is a meaningful association of RLS and CVD. On the other hand, numerous cross-sectional and longitudinal observational studies have shown a strong association of obstructive sleep apnea (OSA) with CVD risk. Each of the potential mediating mechanisms in OSA may also be assessed in RLS, including 1) neural mechanisms such as increased central sympathetic outflow, impaired baroreflex function, diminished heart rate and blood pressure variability, and increased chemoreflex sensitivity, 2) metabolic mechanisms such as glucose intolerance and reduced insulin sensitivity/diabetes as a result of sleep disturbance in RLS, 3) oxidative stress, 4) systemic or vascular inflammatory mechanisms, and 5) vascular mechanisms including impaired endothelial functioning, increased aortic stiffness, hypothalamic-pituitary axis activation or renin-angiotensin-aldosterone activation. Three known characteristics of RLS may contribute to these specific mechanisms of increased cardiovascular risk: 1) periodic limb movements of sleep, which are associated with large increases in heart rate and blood pressure, 2) sleep fragmentation and sleep deprivation, which are known to produce adverse consequences for neural, metabolic, oxidative, inflammatory, and vascular systems, and 3) iron deficiency, which is an emerging risk for cardiovascular disease. Future research priorities include additional epidemiologic studies which characterize multiple CVD risk factors, case-control studies which examine known markers of cardiovascular risk, and small clinical trials which assess the effects of RLS treatment on intermediate physiological markers such as sympathetic activity or baroreflex control, measures of vascular stiffness and reactivity, or measures of insulin sensitivity and glucose tolerance.
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Hermann DM, Bassetti CL. Role of sleep-disordered breathing and sleep-wake disturbances for stroke and stroke recovery. Neurology 2016; 87:1407-16. [PMID: 27488603 PMCID: PMC5047039 DOI: 10.1212/wnl.0000000000003037] [Citation(s) in RCA: 118] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Accepted: 06/09/2016] [Indexed: 02/01/2023] Open
Abstract
Background: Sleep-disordered breathing (SDB) and sleep-wake disturbances (SWD) are highly prevalent in stroke patients. Recent studies suggest that they represent both a risk factor and a consequence of stroke and affect stroke recovery, outcome, and recurrence. Methods: Review of literature. Results: Several studies have proven SDB to represent an independent risk factor for stroke. Sleep studies in TIA and stroke patients are recommended in view of the very high prevalence (>50%) of SDB (Class IIb, level of evidence B). Treatment of obstructive SDB with continuous positive airway pressure is recommended given the strength of the increasing evidence in support of a positive effect on outcome (Class IIb, level of evidence B). Oxygen, biphasic positive airway pressure, and adaptive servoventilation may be considered in patients with central SDB. Recently, both reduced and increased sleep duration, as well as hypersomnia, insomnia, and restless legs syndrome (RLS), were also suggested to increase stroke risk. Mainly experimental studies found that SWD may in addition impair neuroplasticity processes and functional stroke recovery. Treatment of SWD with hypnotics and sedative antidepressants (insomnia), activating antidepressants or stimulants (hypersomnia), dopaminergic drugs (RLS), and clonazepam (parasomnias) are based on single case observations and should be used with caution. Conclusions: SDB and SWD increase the risk of stroke in the general population and affect short- and long-term stroke recovery and outcome. Current knowledge supports the systematic implementation of clinical procedures for the diagnosis and treatment of poststroke SDB and SWD on stroke units.
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Affiliation(s)
- Dirk M Hermann
- From the Department of Neurology (D.M.H.), University Hospital Essen, Germany; and Department of Neurology (C.L.B.), University Hospital Berne, Switzerland.
| | - Claudio L Bassetti
- From the Department of Neurology (D.M.H.), University Hospital Essen, Germany; and Department of Neurology (C.L.B.), University Hospital Berne, Switzerland.
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Picchietti DL, Van Den Eeden SK, Inoue Y, Berger K. Achievements, challenges, and future perspectives of epidemiologic research in restless legs syndrome (RLS). Sleep Med 2016; 31:3-9. [PMID: 27567163 DOI: 10.1016/j.sleep.2016.06.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 05/13/2016] [Accepted: 06/04/2016] [Indexed: 12/19/2022]
Abstract
In the 20 years since the initial consensus on a common definition for restless legs syndrome (RLS), over 600 scientific reports on epidemiological aspects of RLS have been published. Most are descriptive and address important issues such as prevalence, familial patterns, comorbidities, and quality of life. While the establishment of prospective cohort studies and the use of secondary data sources are rather new to RLS research, both options significantly broaden the possibilities for analysis of disease risk factors. These two options, as well as the inclusion of a broader phenotyping of individual patients, have great potential to elucidate etiologic factors for RLS and expand knowledge about this common disorder. This article summarizes achievements in the area of RLS epidemiology, describes current challenges, and highlights future perspectives in the field.
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Affiliation(s)
- Daniel L Picchietti
- University of Illinois College of Medicine at Urbana-Champaign and Carle Foundation Hospital, Urbana, IL, USA.
| | | | - Yuichi Inoue
- Department of Somnology, Institute of Neuropsychiatry, Tokyo Medical University and Japan Somnology Center, Japan
| | - Klaus Berger
- Institute of Epidemiology and Social Medicine, University of Muenster, Germany
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Bauer A, Cassel W, Benes H, Kesper K, Rye D, Sica D, Winkelman JW, Bauer L, Grieger F, Joeres L, Moran K, Schollmayer E, Whitesides J, Carney HC, Walters AS, Oertel W, Trenkwalder C. Rotigotine's effect on PLM-associated blood pressure elevations in restless legs syndrome: An RCT. Neurology 2016; 86:1785-93. [PMID: 27164714 PMCID: PMC4862252 DOI: 10.1212/wnl.0000000000002649] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Accepted: 01/28/2016] [Indexed: 11/15/2022] Open
Abstract
Objective: This double-blind, placebo-controlled, interventional trial was conducted to investigate the effects of rotigotine patch on periodic limb movement (PLM)–associated nocturnal systolic blood pressure (SBP) elevations. Methods: Patients with moderate to severe restless legs syndrome (RLS) were randomized to rotigotine (optimal dose [1–3 mg/24 h]) or placebo. Continuous beat-to-beat blood pressure (BP) assessments were performed during polysomnography at baseline and at the end of 4-week maintenance. Primary outcome was change in number of PLM-associated SBP elevations (defined as slope of linear regression ≥2.5 mm Hg/beat-to-beat interval over 5 consecutive heartbeats [≥10 mm Hg]). Additional outcomes were total SBP elevations, PLM-associated and total diastolic BP (DBP) elevations, periodic limb movements index (PLMI), and PLM in sleep arousal index (PLMSAI). Results: Of 81 randomized patients, 66 (37 rotigotine, 29 placebo) were included in efficacy assessments. PLM-associated SBP elevations were significantly reduced with rotigotine vs placebo (least squares mean treatment difference [95% confidence interval (CI)] −160.34 [−213.23 to −107.45]; p < 0.0001). Rotigotine-treated patients also had greater reduction vs placebo in total SBP elevations (−161.13 [−264.47 to −57.79]; p = 0.0028), PLM-associated elevations (−88.45 [−126.12 to −50.78]; p < 0.0001), and total DBP elevations (−93.81 [−168.45 to −19.16]; p = 0.0146), PLMI (−32.77 [−44.73 to −20.80]; p < 0.0001), and PLMSAI (−7.10 [−11.93 to −2.26]; p = 0.0047). Adverse events included nausea (rotigotine 23%; placebo 8%), headache (18% each), nasopharyngitis (18%; 8%), and fatigue (13%; 15%). Conclusions: Further investigation is required to determine whether reductions in nocturnal BP elevations observed with rotigotine might modify cardiovascular risk. Classification of evidence: This study provides Class I evidence that for patients with moderate to severe RLS, rotigotine at optimal dose (1–3 mg/24 h) reduced PLM-associated nocturnal SBP elevations.
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Affiliation(s)
- Axel Bauer
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany.
| | - Werner Cassel
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Heike Benes
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Karl Kesper
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - David Rye
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Domenic Sica
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - John W Winkelman
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Lars Bauer
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Frank Grieger
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Lars Joeres
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Kimberly Moran
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Erwin Schollmayer
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - John Whitesides
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Hannah C Carney
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Arthur S Walters
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
| | - Wolfgang Oertel
- From the Munich University Clinic and DZHK (German Centre for Cardiovascular Research) (A.B.); Philipps Universität Marburg (W.C., K.K., W.O.); Somni Bene Institut für Medizinische Forschung und Schlafmedizin (H.B.), Schwerin; Medical Center (H.B.), Rostock University, Germany; Emory University (D.R.), Atlanta, GA; Virginia Commonwealth University (D.S.), Richmond; Massachusetts General Hospital (J.W.W.), Boston; UCB Pharma (L.B., F.G., L.J., E.S.), Monheim am Rhein, Germany; UCB Pharma (K.M.), Smyrna, GA; UCB Pharma (J.W.), Raleigh, NC; Evidence Scientific Solutions (H.C.C.), Horsham, UK; Vanderbilt University School of Medicine (A.S.W.), Nashville, TN; Hertie Foundation (W.O.), Frankfurt am Main; and Department of Neurosurgery (C.T.), University Medical Center, Göttingen and Paracelsus-Elena-Klinik, Kassel, Germany
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Trenkwalder C, Allen R, Högl B, Paulus W, Winkelmann J. Restless legs syndrome associated with major diseases: A systematic review and new concept. Neurology 2016; 86:1336-1343. [PMID: 26944272 DOI: 10.1212/wnl.0000000000002542] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 12/10/2015] [Indexed: 12/21/2022] Open
Abstract
Recent publications on both the genetics and environmental factors of restless legs syndrome (RLS) defined as a clinical disorder suggest that overlapping genetic risk factors may play a role in primary (idiopathic) and secondary (symptomatic) RLS. Following a systematic literature search of RLS associated with comorbidities, we identified an increased prevalence of RLS only in iron deficiency and kidney disease. In cardiovascular disease, arterial hypertension, diabetes, migraine, and Parkinson disease, the methodology of studies was poor, but an association might be possible. There is insufficient evidence for conditions such as anemia (without iron deficiency), chronic obstructive pulmonary disease, multiple sclerosis, headache, stroke, narcolepsy, and ataxias. Based on possible gene-microenvironmental interaction, the classifications primary and secondary RLS may suggest an inappropriate causal relation. We recognize that in some conditions, treatment of the underlying disease should be achieved as far as possible to reduce or eliminate RLS symptoms. RLS might be seen as a continuous spectrum with a major genetic contribution at one end and a major environmental or comorbid disease contribution at the other.
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Affiliation(s)
- Claudia Trenkwalder
- From Center of Parkinsonism and Movement Disorders (C.T.), Paracelsus-Elena Hospital, Kassel; Departments of Neurosurgery (C.T.) and Clinical Neurophysiology (W.P.), University Medical Center, Göttingen, Germany; Department of Neurology (R.A.), The Johns Hopkins Bayview Medical Center, Baltimore, MD; Department of Neurology (B.H.), Medical University of Innsbruck, Austria; Institute for Neurogenomic (J.W.), Helmholtz Zentrum München, Neuherberg; Neurologische Klinik und Poliklinik (J.W.), Klinikum rechts der Isar, Technische Universität München, Munich; and Munich Cluster for Systems Neurology (SyNergy) (J.W.), Munich, Germany.
| | - Richard Allen
- From Center of Parkinsonism and Movement Disorders (C.T.), Paracelsus-Elena Hospital, Kassel; Departments of Neurosurgery (C.T.) and Clinical Neurophysiology (W.P.), University Medical Center, Göttingen, Germany; Department of Neurology (R.A.), The Johns Hopkins Bayview Medical Center, Baltimore, MD; Department of Neurology (B.H.), Medical University of Innsbruck, Austria; Institute for Neurogenomic (J.W.), Helmholtz Zentrum München, Neuherberg; Neurologische Klinik und Poliklinik (J.W.), Klinikum rechts der Isar, Technische Universität München, Munich; and Munich Cluster for Systems Neurology (SyNergy) (J.W.), Munich, Germany
| | - Birgit Högl
- From Center of Parkinsonism and Movement Disorders (C.T.), Paracelsus-Elena Hospital, Kassel; Departments of Neurosurgery (C.T.) and Clinical Neurophysiology (W.P.), University Medical Center, Göttingen, Germany; Department of Neurology (R.A.), The Johns Hopkins Bayview Medical Center, Baltimore, MD; Department of Neurology (B.H.), Medical University of Innsbruck, Austria; Institute for Neurogenomic (J.W.), Helmholtz Zentrum München, Neuherberg; Neurologische Klinik und Poliklinik (J.W.), Klinikum rechts der Isar, Technische Universität München, Munich; and Munich Cluster for Systems Neurology (SyNergy) (J.W.), Munich, Germany
| | - Walter Paulus
- From Center of Parkinsonism and Movement Disorders (C.T.), Paracelsus-Elena Hospital, Kassel; Departments of Neurosurgery (C.T.) and Clinical Neurophysiology (W.P.), University Medical Center, Göttingen, Germany; Department of Neurology (R.A.), The Johns Hopkins Bayview Medical Center, Baltimore, MD; Department of Neurology (B.H.), Medical University of Innsbruck, Austria; Institute for Neurogenomic (J.W.), Helmholtz Zentrum München, Neuherberg; Neurologische Klinik und Poliklinik (J.W.), Klinikum rechts der Isar, Technische Universität München, Munich; and Munich Cluster for Systems Neurology (SyNergy) (J.W.), Munich, Germany
| | - Juliane Winkelmann
- From Center of Parkinsonism and Movement Disorders (C.T.), Paracelsus-Elena Hospital, Kassel; Departments of Neurosurgery (C.T.) and Clinical Neurophysiology (W.P.), University Medical Center, Göttingen, Germany; Department of Neurology (R.A.), The Johns Hopkins Bayview Medical Center, Baltimore, MD; Department of Neurology (B.H.), Medical University of Innsbruck, Austria; Institute for Neurogenomic (J.W.), Helmholtz Zentrum München, Neuherberg; Neurologische Klinik und Poliklinik (J.W.), Klinikum rechts der Isar, Technische Universität München, Munich; and Munich Cluster for Systems Neurology (SyNergy) (J.W.), Munich, Germany.
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Innes KE, Kandati S, Flack KL, Agarwal P, Selfe TK. The Relationship of Restless Legs Syndrome to History of Pregnancy-Induced Hypertension. J Womens Health (Larchmt) 2016; 25:397-408. [PMID: 26913940 DOI: 10.1089/jwh.2015.5484] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Restless legs syndrome (RLS), a burdensome sleep disorder, has been associated with cardiovascular disease (CVD), hypertension, diabetes, and related disorders. However, the relationship of RLS to history of pregnancy-induced hypertension (PIH), a predictor of subsequent CVD, diabetes, and associated conditions, remains little explored. In this study, we investigated the relationship of RLS to history of PIH in a sample of primary care patients. METHODS Participants were women aged ≥40 years drawn from an anonymous survey study of West Virginia primary care patients. Data collected included detailed information on demographics, lifestyle factors, sleep patterns, and reproductive/medical history; the survey also included an RLS diagnostic questionnaire. Women who were pregnant or unsure about their pregnancy status were excluded from the analyses. RESULTS Of the 498 participants in the final analytic sample, 24.5% met diagnostic criteria for RLS (17.9% with symptoms ≥once/week, 11.9% with symptoms ≥3 times/week); 73 (16.5% of parous women) reported a history of PIH, defined as physician-diagnosed preeclampsia or gestational hypertension. After adjustment for demographics, lifestyle characteristics, obesity, reproductive history, health conditions, and other factors, those reporting a history of PIH were approximately twice as likely to meet criteria for RLS (odds ratio [OR] = 1.9; 95% confidence interval [CI] = 1.1, 3.6). These associations increased in magnitude with increasing symptom frequency (adjusted OR for RLS with symptoms ≥3 times/week = 3.8; CI 1.9, 7.6; p for trend = 0.003). CONCLUSIONS History of PIH was strongly and positively related to current RLS in this study of primary care patients; these findings further support a possible role for metabolic dysregulation in RLS etiology.
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Affiliation(s)
- Kim E Innes
- 1 Department of Epidemiology, West Virginia University School of Public Health , Morgantown, West Virginia.,2 Center for the Study of Complementary and Alternative Therapies, University of Virginia Health System , Charlottesville, Virginia.,3 Department of Physical Medicine and Rehabilitation, University of Virginia Health System , Charlottesville, Virginia
| | - Sahiti Kandati
- 1 Department of Epidemiology, West Virginia University School of Public Health , Morgantown, West Virginia
| | - Kathryn L Flack
- 1 Department of Epidemiology, West Virginia University School of Public Health , Morgantown, West Virginia.,4 WV Focus: Reproductive Education & Equality , Charleston, West Virginia
| | - Parul Agarwal
- 5 Department of Pharmaceutical Systems and Policy, West Virginia University School of Pharmacy , Morgantown, West Virginia
| | - Terry Kit Selfe
- 1 Department of Epidemiology, West Virginia University School of Public Health , Morgantown, West Virginia.,2 Center for the Study of Complementary and Alternative Therapies, University of Virginia Health System , Charlottesville, Virginia
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Molnar MZ, Lu JL, Kalantar-Zadeh K, Kovesdy CP. Association of incident restless legs syndrome with outcomes in a large cohort of US veterans. J Sleep Res 2016; 25:47-56. [PMID: 26377112 PMCID: PMC4795990 DOI: 10.1111/jsr.12335] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 07/15/2015] [Indexed: 11/27/2022]
Abstract
Restless legs syndrome is a common sleep disorder, but there is a paucity of large cohort studies examining the association of restless legs syndrome with clinical outcomes, including all-cause mortality, incident coronary heart disease, stroke and chronic kidney disease. From a nationally representative prospective cohort of over 3 million US veterans [93% male, median follow-up time of 8.1 years (interquartile range: 7.0-8.5 years)] with baseline estimated glomerular filtration rate ≥ 60 mL min(-1) 1.73 m(-2), a propensity-matched cohort of 7392 patients was created, and the association between incident restless legs syndrome and the following was examined: (1) all-cause mortality; (2) incident coronary heart disease; (3) incident strokes; and (4) incident chronic kidney disease defined as estimated glomerular filtration rate <60 mL min(-1) 1.73 m(-2). Associations were examined using Cox models. The mean ± SD age of the propensity-matched cohort at baseline was 59 ± 12 years; 89 and 8% of patients were white and black, respectively; 31% of the patients were diabetic; and the mean baseline estimated glomerular filtration rate was 83.9 ± 15.1 mL min(-1) 1.73 m(-2). Propensity matching resulted in a balanced cohort, with the disappearance in baseline differences in comorbidities. Compared with restless legs syndrome-negative patients, incident restless legs syndrome was associated with 88% higher mortality risk [hazard ratio and 95% confidence interval: 1.88 (1.70-2.08)], and almost four times higher risk of coronary heart disease and stroke [hazard ratio: 3.97 (3.26-4.84) and 3.89 (3.07-4.94), respectively]. The risk of incident chronic kidney disease was also significantly higher in incident restless legs syndrome patients [hazard ratio: 3.17 (2.74-3.66)] compared with restless legs syndrome-negative counterparts. In this large and contemporary cohort of US veterans, incident restless legs syndrome was associated with higher risk of mortality, incident coronary heart disease, stroke and chronic kidney disease.
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Affiliation(s)
- Miklos Z Molnar
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Jun L Lu
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | | | - Csaba P Kovesdy
- Division of Nephrology, Department of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
- Nephrology Section, Memphis Veterans Affairs Medical Center, Memphis, TN, USA
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Frank MK, de Mello MT, Lee KS, Daubian-Nosé P, Tufik S, Esteves AM. Sleep-related movement disorder symptoms in SHR are attenuated by physical exercise and an angiotensin-converting enzyme inhibitor. Physiol Behav 2016; 154:161-8. [DOI: 10.1016/j.physbeh.2015.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 09/28/2015] [Accepted: 11/25/2015] [Indexed: 11/16/2022]
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Szentkirályi A, Völzke H, Hoffmann W, Winkelmann J, Berger K. Lack of Association between Genetic Risk Loci for Restless Legs Syndrome and Multimorbidity. Sleep 2016; 39:111-5. [PMID: 26350469 DOI: 10.5665/sleep.5328] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 07/30/2015] [Indexed: 01/09/2023] Open
Abstract
STUDY OBJECTIVES Multimorbidity is a risk factor for incident restless legs syndrome (RLS). In this relationship, the potential role of known genetic risk loci for RLS has not been studied. Our aim was to evaluate whether carriers of specific RLS risk alleles have higher comorbidity burden than noncarriers. METHODS The Dortmund Health Study (DHS) and the Study of Health in Pomerania (SHIP) are two independent cohort studies in Germany based on age-stratified, random samples drawn from the respective population registers. DHS included 1,312 subjects and SHIP included 4,308 subjects. RLS status was assessed according to the RLS standard minimal criteria. A comorbidity index was calculated by summing the scores of the following conditions: diabetes, hypertension, myocardial infarction, obesity, stroke, cancer, renal disease, anemia, depression, thyroid disease, and migraine. Thirteen single nucleotide polymorphisms (SNP) previously associated with elevated risk of RLS were genotyped. Analyses were carried out on the pooled sample of the two studies. RESULTS The mean age was 50.4 ± 15.9 y, and the proportion of women was 51.4%. The mean number of comorbid conditions was 1.5 ± 1.3. In multivariable regression, the mean number of comorbidities was not significantly different between carriers of any of the RLS risk alleles and noncarriers either in the total pooled sample or in those having RLS symptoms. CONCLUSIONS Based on these results it is unlikely that known genetic risk factors for RLS would lead to increased multimorbidity.
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Affiliation(s)
- András Szentkirályi
- Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
| | - Henry Völzke
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany.,German Centre for Cardiovascular Research, Partner site Greifswald, Germany
| | - Wolfgang Hoffmann
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany.,German Centre for Neurodegenerative Diseases (DZNE), Germany
| | - Julianne Winkelmann
- Institute of Human Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.,Department of Neurology, Technische Universität München, Munich, Germany.,Department of Neurology and Neurosciences, Stanford Center for Sleep Medicine and Sciences, Stanford University, Palo Alto, CA
| | - Klaus Berger
- Institute of Epidemiology and Social Medicine, University of Münster, Münster, Germany
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Trautmann E, Barke A, Frisch JU, Schmidt AL, Kunert F, Canelo M, Sixel-Döring F, Trenkwalder C. Restless Legs Syndrome: Psychiatric Comorbidities Are More Important Than Neuroticism. Behav Sleep Med 2015; 13:375-86. [PMID: 24945565 DOI: 10.1080/15402002.2014.919917] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Restless legs syndrome (RLS) is often associated with psychopathological symptoms. We compared psychiatric diagnoses, psychological complaints, sleep and personality traits in RLS patients and a control group The RLS patients also answered the IRLS, RLS-6, and QoL-RLS. The RLS patients showed more depressive disorders, psychopathological symptoms, and lower well-being than controls, but no differences in personality traits. The slightly, but not significantly, higher neuroticism found in RLS patients can be explained by the higher rates of depression among the patients. It is advisable to screen RLS patients for psychiatric comorbidities. The design using a matched control group without sleep disorders limits the conclusions that can be drawn regarding the frequency of psychiatric diagnoses and controls with sleep problems.
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Stefanidis I, Vainas A, Giannaki C, Dardiotis E, Spanoulis A, Sounidaki M, Eleftheriadis T, Liakopoulos V, Karatzaferi C, Sakkas G, Zintzaras E, Hadjigeorgiou G. Restless legs syndrome does not affect 3-year mortality in hemodialysis patients. Sleep Med 2015; 16:1131-8. [DOI: 10.1016/j.sleep.2015.04.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2014] [Revised: 04/13/2015] [Accepted: 04/19/2015] [Indexed: 11/30/2022]
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Wali SO, Abaalkhail B. Prevalence of restless legs syndrome and associated risk factors among middle-aged Saudi population. Ann Thorac Med 2015; 10:193-8. [PMID: 26229562 PMCID: PMC4518350 DOI: 10.4103/1817-1737.160839] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 03/13/2015] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND AND AIM: The prevalence of restless legs syndrome (RLS) in the general population ranges from 5 to 15%; however, locally, such data are scarce. The aim of this study was to estimate the prevalence of RLS in the middle-aged Saudi population. METHODS: This was a cross-sectional study that was conducted from February 2013 to June 2013 in Jeddah, Saudi Arabia. The target study population was Saudi school employees. Saudi employees aged 30-60 years were randomly selected and interviewed individually. Trained interviewers completed the Wisconsin Sleep Questionnaire, questions about demographics, the Epworth Sleepiness Scale to measure daytime sleepiness, and questions regarding symptoms of RLS based on the criteria defined by the International Restless Legs Syndrome Study Group (IRLSSG). RESULTS: This survey revealed that 8.4% (95% confidence interval (CI): (7.35-9.45)) of the 2,682 participants (62.5% of them were males) had RLS. There was no age effect on the prevalence of RLS. RLS was found to be significantly associated with other sleep disorders, including excessive daytime sleepiness and habitual snoring. A univariate analysis revealed significant correlation of many factors with the RLS, including gender, consanguinity, snoring, diabetes, hypertension, asthma, chronic bronchitis, and smoking. However, when a multivariate logistic regression analysis performed, RLS continued to be associated with male gender, diabetes, asthma, and habitual snoring only. CONCLUSION: The prevalence of RLS is 8.4%, which is within the range reported by Western studies. However, unlike findings of most studies, RLS significantly affects males more than females. In addition, snoring, asthma, and consanguinity are potential new risk factors for RLS.
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Affiliation(s)
- Siraj Omar Wali
- Sleep Medicine and Research Center, Department of Medicine, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Bahaa Abaalkhail
- Department of Family and Community Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
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Van Den Eeden SK, Albers KB, Davidson JE, Kushida CA, Leimpeter AD, Nelson LM, Popat R, Tanner CM, Bibeau K, Quesenberry CP. Risk of Cardiovascular Disease Associated with a Restless Legs Syndrome Diagnosis in a Retrospective Cohort Study from Kaiser Permanente Northern California. Sleep 2015; 38:1009-15. [PMID: 26083613 DOI: 10.5665/sleep.4800] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 01/31/2015] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION Recent cross-sectional studies suggest that restless legs syndrome (RLS) may be associated with an increased prevalence of cardiovascular disease (CVD) comorbidity or risk factors. We evaluated whether primary or secondary RLS was associated with an increased risk of incident cardiovascular disease in a retrospective cohort study within Kaiser Permanente Northern California (KPNC). METHODS We identified members of KPNC with primary RLS and secondary RLS between 1999 and 2008 by an algorithm that incorporated longitudinal clinical records related to the diagnosis and treatment of RLS and comorbidities. We then matched each RLS case with up to 50 individuals with no clinical records of RLS by age, sex, race/ethnicity, zip code, and membership duration. For the analyses we excluded any individual with coronary artery disease (CAD: angina, acute myocardial infarction, coronary revascularization procedure, CAD death), CVD (CAD plus stroke), and hypertension at baseline. New cardiovascular events were determined from clinical records. Follow-up ended at an outcome event, disenrollment from KPNC, or death, whichever occurred earliest. There were over 473,358 person-y of follow-up in this cohort analysis with a mean follow-up time of 3.91 y and range from 6 mo to 12 y. Survival analysis techniques, including survival curves and proportional hazard regression models, were used to assess the association between RLS status and CVD. RESULTS There were 7,621 primary RLS and 4,507 secondary RLS cases identified and included in the study. In general, primary RLS cases were younger and had less comorbidity than secondary RLS cases. During the follow-up period, CVD was diagnosed in 478 primary RLS cohort members, CAD was diagnosed in 310, and hypertension events were identified in 1,466. Diagnosis in secondary RLS cohort members was made during the follow-up period with 451, 338, and 598 CVD, CAD, and hypertension events, respectively. Subjects with primary RLS had a similar risk of incident CVD (hazard ratio (HR) = 0.95; 95% confidence interval (CI) = 0.86-1.04) and CAD (HR = 0.99; 95% CI = 0.89-1.13) to the comparison cohort, with a slight elevation in the risk of hypertension events (HR = 1.19; 95% CI = 1.12-1.25), after multivariable adjustment. Individuals classified as secondary RLS had a significant increased risk of CVD (HR = 1.33; 95% CI = 1.21-1.46), CAD (HR = 1.40; 95% CI = 1.25-1.56), and hypertension (HR = 1.28; 95% CI = 1.18-1.40). CONCLUSION Primary restless legs syndrome (RLS) was not associated with new-onset cardiovascular disease (CVD) or coronary artery disease (CAD) but was associated with a slight increased risk of hypertension. In contrast, secondary RLS was associated with an increased risk of CVD, CAD, and hypertension.
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Affiliation(s)
| | - Kathleen B Albers
- Division of Research, Kaiser Permanente Northern California, Oakland, CA
| | - Julie E Davidson
- Worldwide Epidemiology, GlaxoSmithKline, Research Triangle Park, NC and Stockley Park, UK
| | - Clete A Kushida
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA
| | | | - Lorene M Nelson
- Division of Epidemiology, Department of Health Research and Policy, Stanford University, Stanford, CA
| | - Rita Popat
- Division of Epidemiology, Department of Health Research and Policy, Stanford University, Stanford, CA
| | | | - Kristen Bibeau
- Worldwide Epidemiology, GlaxoSmithKline, Research Triangle Park, NC and Stockley Park, UK
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Fang Z, Liu YW, Zhao LY, Xu Y, Zhang FX. Sleep-associated movement disorders and the risk of cardiovascular disease: A systematic review and meta-analysis. World J Meta-Anal 2015; 3:181-187. [DOI: 10.13105/wjma.v3.i3.181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 02/20/2015] [Accepted: 04/20/2015] [Indexed: 02/05/2023] Open
Abstract
AIM: To investigate whether an association exists between sleep-associated movement disorders and cardiovascular disease (CVD).
METHODS: Several studies have observed the relationship of sleep-associated movement disorders such as restless legs syndrome (RLS) and periodic limb movements during sleep with CVD, but the results were still contradictory. We performed an extensive literature search on PubMed, Medline and Web of Science published from inception to December 2014. Additional studies were manually searched from bibliographies of retrieved studies. Meta-analyses were conducted with Stata version 12.0 (Stata Corp, College Station, Texas). Pooled odds ratios (ORs) and 95%CIs were calculated to assess the strength of association using the random effects model. Sensitivity and subgroup analyses were performed to explore the underlying sources of heterogeneity. The publication bias was detected using Egger’s test and Begg’s test.
RESULTS: A total of 781 unique citations were indentified from electronic databases and 13 articles in English were finally selected. Among these studies, nine are cohort studies; two are case-control studies; and two are cross-sectional studies. The results showed that the summary OR of CVD associated with sleep-associated movement was 1.51 (95%CI: 1.29-1.77) in a random-effects model. There was significant heterogeneity between individual studies (P for heterogeneity = 0.005, I2 = 57.6%). Further analysis revealed that a large-scale cohort study may account for this heterogeneity. A significant association was also found between RLS and CVD (OR = 1.54, 95%CI: 1.24-1.92). In a fixed-effects model, we determined a significant relationship between sleep-associated movement disorders and coronary artery disease (CAD) (OR = 1.34, 95%CI: 1.16-1.54; P for heterogeneity = 0.210; I2 = 30.0%). Our meta-analysis suggests that sleep-associated movement disorders are associated with prevalence of CVD and CAD.
CONCLUSION: This finding indicates that sleep-associated movement disorders may prove to be predictive of underlying CVD.
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Abstract
Restless legs syndrome is a common sensorimotor disorder characterized by an urge to move, and associated with uncomfortable sensations in the legs (limbs). Restless legs syndrome can lead to sleep-onset or sleep-maintenance insomnia, and occasionally excessive daytime sleepiness, all leading to significant morbidity. Brain iron deficiency and dopaminergic neurotransmission abnormalities play a central role in the pathogenesis of this disorder, along with other nondopaminergic systems, although the exact mechanisms are still. Intensive care unit patients are especially vulnerable to have unmasking or exacerbation of restless legs syndrome because of sleep deprivation, circadian rhythm disturbance, immobilization, iron deficiency, and use of multiple medications that can antagonize dopamine.
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Affiliation(s)
- Saiprakash B Venkateshiah
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Octavian C Ioachimescu
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.
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Schlesinger I, Erikh I, Nassar M, Sprecher E. Restless legs syndrome in stroke patients. Sleep Med 2015; 16:1006-10. [PMID: 26116464 DOI: 10.1016/j.sleep.2014.12.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/20/2014] [Accepted: 12/19/2014] [Indexed: 11/15/2022]
Abstract
BACKGROUND Restless legs syndrome (RLS) is associated with cerebrovascular risk factors, but its possible association with cerebrovascular disease has yielded conflicting results. OBJECTIVE This was a case-control, in-hospital study to evaluate the association between RLS and acute stroke or transient ischemic attack (TIA). METHODS We evaluated patients hospitalized with acute stroke/TIA and an age and gender 2:1 frequency-matched control group, for the presence of RLS. RESULTS Twenty-two of 149 patients (15%) and 10 of 298 controls (3%) suffered from RLS (p <0.0001). A multivariate logistic regression model employing cerebrovascular risk factors as predictors, that is, hypertension, hyperlipidemia, diabetes, and body mass index (BMI), determined that stroke/TIA was significantly associated with RLS with odds ratio for RLS among patients with stroke/TIA versus controls of 7.60 (95% confidence interval (CI): 2.07-27.87; p = 0.002). Another multivariate logistic regression model adjusting for possible RLS risk factors, that is, hypertension, hyperlipidemia, diabetes, BMI, anemia, and reduced renal function, determined that stroke/TIA was significantly associated with RLS with odds ratio of 6.85 (95% CI: 6.85-1.79; p = 0.005). Stepwise logistic regression with hypertension, hyperlipidemia, diabetes, BMI, anemia, and reduced renal function as potential predictors revealed that only stroke/TIA predicted RLS with similar odds ratio to the RLS-based multivariate model of 6.54 (95% CI: 2.63-16.27; p <0.0001). CONCLUSIONS Examining stroke patients while in hospital allowed us to conclude that RLS and acute stroke/TIA are significantly associated. However, the cross-sectional design did not allow for the determination of a causative relationship between the two.
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Affiliation(s)
- I Schlesinger
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel; Technion Faculty of Medicine, Haifa, Israel.
| | - I Erikh
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel
| | - M Nassar
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel
| | - E Sprecher
- Department of Neurology, Rambam Health Care Campus, Haifa, Israel
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