A Study of Multiple Sclerosis Routine Clinical Practice: Impact on Adherence and Clinical Outcomes of Ofatumumab Treated Patients

Retrospective, Non-interventional Study of Multiple Sclerosis Routine Clinical Practice: Impact on Adherence and Clinical Outcomes of Ofatumumab Treated Patients

This was a retrospective non-interventional study (NIS) of adult (≥18 years) multiple sclerosis (MS) patients on ofatumumab therapy in the United Kingdom (UK) using secondary data. UK MS centers with National Health Service (NHS) databases and/or homecare and pharmacy services prescribing ofatumumab were identified and recruited for study participation using a feasibility assessment exercise. The study index identification window spanned from 26 March 2021 to 30 June 2023 (or latest data available prior to start of study data extraction). The index date was defined as the first date ofatumumab was dispensed or injected within the index identification window. From index date, patients were followed up until death, up to 13 months after index date, loss to follow-up, or end of study index identification window (whichever came first).

For patients who consented to the use of their data, participating sites transcribed protocol required patient data from existing individual patient medical records into an electronic case report form (eCRF). The end of study was defined as the date of last data query resolution (i.e., all data had been recorded in the eCRF and all data queries resolved to allow database lock to occur). This ensured that all data was available to answer the research questions in the study.

Inclusion criteria:

Patients were included in the study if they met all of the following criteria:

• Patient was prescribed ofatumumab within the UK approved marketing authorization

• Patient initiated ofatumumab via participating MS clinic with or without KC PSP

• Patients initiated ofatumumab during the index identification window

• Authorized to collect study data:

  1. Patient was alive at start of data collection and patient consented prior to start of their data collection or,
  2. Patient was deceased at start of data collection and a member of the patient's direct care team had a pre-existing right to access patient medical record

• Specifically for adherence analyses: Patients were required to have a minimum of 6 months of follow-up post index date available to make this assessment

• Specifically for clinical effectiveness analyses: Patients were required to have a minimum of 6 months look-back pre-index date and minimum 6 months follow-up post index date available to make this assessment.

Exclusion criteria:

Patients were excluded from the study if they met the following criteria:

• Patient prescribed ofatumumab outside the approved marketing authorization (i.e., under off-label prescribing) at any point within the patients record