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Introduction: Restless legs syndrome (RLS) is a disorder characterised by an irresistible urge to move the legs, usually accompanied by unpleasant sensations. It is more frequent in patients with multiple sclerosis (MS) than in the general population., Objectives: To evaluate the prevalence of RLS, defined according to the 4 essential requirements included in the diagnostic criteria proposed by the International Restless Leg Syndrome Study Group, in a cohort of patients with MS; and to identify potential risk factors and the clinical impact of RLS., Results: The sample included 120 patients with MS, with a mean age of symptom onset of 40 years and an average disease duration of 46 months. The prevalence rate of RLS was 23.3%. MS progression time was significantly shorter in patients with RLS (P=.001). A recent relapse, and symptoms of anxiety, depression, and neuropathic pain were significantly associated with risk of RLS (P=.001, P<.001, P<.001, and P=.001, respectively). In addition, patients with RLS had a greater risk of poor sleep quality, fatigue, daytime sleepiness, and poor quality of life than those without RLS (P=.002, P=.017, P=.013, and P=.009, respectively)., Conclusions: RLS should be considered in the neurological evaluation of patients with MS; early diagnosis and treatment would improve the quality of life of patients with MS presenting RLS., (Copyright © 2019 Sociedad Española de Neurología. Published by Elsevier España, S.L.U. All rights reserved.)

Introduction: Restless legs syndrome (RLS) is a disorder characterised by an irresistible urge to move the legs, usually accompanied by unpleasant sensations. It is more frequent in patients with multiple sclerosis (MS) than in the general population., Objectives: To evaluate the prevalence of RLS, defined according to the 4 essential requirements included in the diagnostic criteria proposed by the International Restless Leg Syndrome Study Group, in a cohort of patients with MS; and to identify potential risk factors and the clinical impact of RLS., Results: The sample included 120 patients with MS, with a mean age of symptom onset of 40 years and an average disease duration of 46 months. The prevalence rate of RLS was 23.3%. MS progression time was significantly shorter in patients with RLS (P = 0.001). A recent relapse, and symptoms of anxiety, depression, and neuropathic pain were significantly associated with risk of RLS (P = 0.001, P < 0.001, P < 0.001, and P = 0.001, respectively). In addition, patients with RLS had a greater risk of poor sleep quality, fatigue, daytime sleepiness, and poor quality of life than those without RLS (P = 0.002, P = 0.017, P = 0.013, and P = 0.009, respectively)., Conclusions: RLS should be considered in the neurological evaluation of patients with MS; early diagnosis and treatment would improve the quality of life of patients with MS presenting RLS., (Copyright © 2019 Sociedad Española de Neurología. Publicado por Elsevier España, S.L.U. All rights reserved.)