Investigating the Relationship Between Sleep, Quality of Life,Other Disorders and Therapies in MS Patients on Betaferon

Inclusion Criteria: * Patients ≥ 18 years of age with relapsing remitting multiple sclerosis or a clinically isolated syndrome and an expanded disability status scale score ≤5. * Patients must be on treatment with Betaferon and tolerate Betaferon according to the investigator's evaluation, but should not have received Betaferon longer than six months. * Written informed consent must be obtained Exclusion Criteria: * Patients who do not tolerate Betaferon according to the investigator's evaluation or have been treated with Betaferon for more than six months. * Patients receiving any other disease modifying drug or MS specific treatments * Contraindications of Betaferon described in the Summary of Product Characteristics.