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Adherence to subcutaneous interferon beta-1a treatment using an electronic injection device: a prospective open-label Scandinavian noninterventional study (the ScanSmart study)

Authors Pedersen ED, Stenager E, Vadgaard JL, Jensen MB, Schmid R, Meland N, Magnussen G, Frederiksen JL

Received 18 October 2017

Accepted for publication 3 February 2018

Published 19 April 2018 Volume 2018:12 Pages 569—575

DOI https://doi.org/10.2147/PPA.S154417

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Doris YP Leung

Peer reviewer comments 2

Editor who approved publication: Dr Johnny Chen


Elena Didenko Pedersen,1,2 Egon Stenager,3,4 JL Vadgaard,5 MB Jensen,6 R Schmid,7 N Meland,8 G Magnussen,9 Jette L Frederiksen10,11

1Akershus University Hospital, Department of Neurology, Loerenskog, Norway; 2Sandvika Nevrosenter, Sandvika, Norway; 3MS Clinic of Southern Jutland, Department of Neurology, Hospital of Southern Denmark, Odense, Denmark; 4Institute of Regional Research, University of Southern Denmark, Odense, Denmark; 5Department of Neurology, Sjællands University Hospital, Roskilde NeuroCenter, Roskilde, Denmark; 6Department of Neurology, Nordsjaellands Hospital, Hilleroed, Denmark; 7MS Clinic, Department of Neurology, Vejle Hospital, Vejle, Denmark; 8Smerud Medical Research, Oslo, Norway; 9Merck Norway, An Affiliate of Merck AB (Merck AB NUF), Oslo, Norway; 10Department of Neurology, Rigshospitalet Glostrup, Faculty of Health and Medical Science, Glostrup, Denmark; 11Institute of Clinical Medicine, Copenhagen University, Copenhagen, Denmark

Background: Disease modifying drugs help control the course of relapsing remitting multiple sclerosis (RRMS); however, good adherence is needed for long-term outcomes.
Objective: To evaluate patient adherence to treatment with subcutaneous interferon beta-1a using RebiSmart® and assess injection-site reactions and treatment satisfaction.
Methods: This prospective, single-arm, open-label, noninterventional multicenter Phase IV trial included disease modifying drug-experienced mobile patients with RRMS. Adherence was measured over 12 weeks. Items 13–23, 35, 37, and 38 of the Multiple Sclerosis Treatment Concerns Questionnaire (injection-site reactions and treatment satisfaction) were recorded at 12 weeks.
Results: Sixty patients were recruited (mean age 43.7 [±SD 7.9] years; 83% female; mean years since multiple sclerosis diagnosis 6.7 [SD 4.5]). Adherence data were obtained in 54 patients only due to technical problems with six devices. Over 12 weeks, 89% (n=48) of patients had ≥90% adherence to treatment. Most patients experienced mild influenza-like symptoms and injection-site reactions, and global side effects were minimal. Most patients (78%) rated the convenience as the most important aspect of the device, and most experienced no or mild pain.
Conclusion: RRMS patients treated with subcutaneous interferon beta-1a, administered with RebiSmart, demonstrated generally good adherence, and the treatment was generally well tolerated.

Keywords:
adherence, multiple sclerosis, relapsing remitting MS, subcutaneous interferon beta-1a, RebiSmart, trial

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