Assessment of adherence to, and persistence with, an electromechanical autoinjector for subcutaneous interferon beta-1a injections for multiple sclerosis treatment over 3 years.

Self-administration of subcutaneous interferon beta-1a (sc IFN β-1a) can be achieved with the RebiSmart® electromechanical autoinjector. This study investigated adherence to, and duration of persistence with, the newest version of the device (v1.6) among 2644 people receiving sc IFN β-1a for multiple sclerosis (MS). This retrospective, observational study utilized data from RebiSmart® devices, recorded on the MSdialog database, between January 2014 and November 2019. Adherence and persistence were evaluated over a 3-year period and assessed in relation to age, sex, injection type, and injection depth. The population of RebiSmart® users (N = 2644) comprised of 1826 (69.1%) females and mean age was 39 (range 16-83) years. Adherence to RebiSmart® use and data transfer to the MSdialog database was consistently high (mean 91.7%; range 86.8-92.6%), including across all variables (81.6-100%). Mean (±SD) persistence during the study period was 1.35 ± 1.06 years, with a maximum recorded persistence of 5.1 years. In multivariate analysis, the longest durations of persistence were observed among older individuals and males (p < 0.0001 and p = 0.0078, respectively). People living with MS were highly adherent to use of the RebiSmart® device, with higher persistence generally observed for older and/or male individuals.

Citation

Francesco Piras, Lilian Arnaud, Eric Henninger, Matthew Keiser, Andrea Seitzinger, Dominic Jack, Quentin Le Masne. Assessment of adherence to, and persistence with, an electromechanical autoinjector for subcutaneous interferon beta-1a injections for multiple sclerosis treatment over 3 years. Expert opinion on drug delivery. 2023 Jun;20(6):863-870

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PMID: 37273189

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