A Cross-sectional Study to Assess the Effectiveness and Safety of Ofatumumab (Kesimpta®) in Patients With Relapsing Multiple Sclerosis in the Spanish Clinical Practice

A Cross-sectional Study to Assess the Effectiveness and Safety of Ofatumumab (Kesimpta®) in Patients With Relapsing Multiple Sclerosis in the Spanish Clinical Practice: the CRONOS-MS Study.

This was a non-interventional, cross-sectional, multicentric, and nationwide study, based on primary and secondary data collection.

The present study aimed to characterize the use of subcutaneous ofatumumab in a real-world setting. Specifically, the investigation assessed the effectiveness, safety, and treatment adherence associated with subcutaneous ofatumumab in individuals with relapsing forms of multiple sclerosis (RMS) within the Spanish healthcare system.

The study used primary and secondary data collection. Primary data collection included information collected using PRO, clinical-reported outcomes (ClinRO), scales or tests and the interview during the study visit. Secondary data collection included existing data from electronic medical records (EMR) or paper-based medical records, collected as part of the routine follow-up of patients with RMS in the clinical practice.

Baseline was defined as the date of ofatumumab initiation.

Inclusion Criteria:

1. Aged ≥ 18 years.
2. Written informed consent.
3. Diagnosis of RMS per McDonald Criteria (2017).
4. Ofatumumab treatment in line with the European Kesimpta® summary of product characteristics (SmPC; i.e. adult patients with RMS with active disease defined by clinical or imaging features) during at least 12 months and patients who discontinued ofatumumab after receiving at least one dose with a minimum monitoring of 12 months.

Exclusion Criteria:

1. Currently participating in a clinical trial.
2. Not able/unlikely to complete with all study activities according to investigator's criteria.
3. Have a contraindication for ofatumumab use, according to the SmPC.