Restless legs syndrome and related factors in people with multiple sclerosis in Turkey.

OBJECTIVE Restless legs syndrome is one of the most reported sleep disorders in multiple sclerosis (MS). The study aims to investigate the possible factors related to the occurrence and severity of restless legs syndrome in persons with MS (pwMS) comparing with healthy controls. METHODS This is a case-control study that included 447 pwMS and 57 healthy controls. Demographic and clinical data such as gender, age, duration of education, body mass index, marital status, disease duration, and MS type were recorded. Neurological disability was assessed by the Expanded Disability Status Scale. The Restless Legs Syndrome Rating Scale was used to assess the severity of restless legs syndrome. RESULTS The prevalence of restless legs syndrome in pwMS was 133 (29.8%) and 3 (4.9%) in healthy controls (p   0.05). Patients with restless legs syndrome have more advanced age, longer disease duration, and higher Expanded Disability Status Scale scores than patients without restless legs syndrome (p   0.05). CONCLUSIONS This study has shown that the presence of restless legs syndrome is high in persons with MS compared to healthy controls. Advanced age, disease duration, and higher disability level could be related to the increased rate of restless legs syndrome in persons with MS, especially those with high-frequency symptoms.