This is a 2 cohort, multi-center, observational study carried out in Portugal that aims to describe the effectiveness of Ofatumumab in a setting of routine medical care. Primary data will be collected from Multiple Sclerosis patients who initiate Ofatumumab early and later in their disease (cohorts 1 and 2, respectively).~Data will be collected during 3 visits distributed over a maximum period of 24 months. Exceptionally, if the patient shows Expanded Disability Status Scale (EDSS) worsening in visit 2 or 3 (12 and 24 months after Ofatumumab initiation, respectively), there will be an additional visit 6±1 months after visit 2 or 3 for EDSS confirmation.~The study includes patients that have initiated Ofatumumab up to 12 months prior inclusion in the study OR Patients that are initiating Ofatumumab at the moment of study inclusion.~Patients in both cohorts will have to be treated with Ofatumumab for at least two years to compare No Evidence of Disease Activity (NEDA)-3 at 12 to 24 months, respectively.
This non-interventional study will compare the effect of Ofatumumab treatment between patients that began Ofatumumab within the 3 years after Multiple Sclerosis diagnosis and patients that began Ofatumumab with more than 3 years of Multiple Sclerosis diagnosis in a real-world setting in Portugal.