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Continuous effectiveness and safety after a hospital-wide switch to adalimumab biosimilar: An observational study in
Rianne Brouwer1, Peter M Ten Klooster2, Joost B Masselink3
1Department of Rheumatology and Clinical Immunology, Medisch Spectrum Twente, Enschede, The Netherlands.
Abstract:
The objective of this study was to examine the maintenance of effect and safety after a hospital-wide switch for economic reasons from adalimumab originator Humira® to biosimilar Amgevita® in real-world rheumatoid arthritis (RA) patients and patient satisfaction with the switch. We conducted a single-center retrospective observational study of RA patients on the course of their disease activity (DAS28, ESR, and CRP), health-related quality of life (SF-36), and functional disability (HAQ-DI) before and up to 1 year after the switch, supplemented with a cross-sectional survey on satisfaction and experienced side effects approximately 18 months after the switch. Treatment outcomes were analyzed with linear mixed modeling and generalized estimating equations. Of 52 RA patients sufficient data were available. Disease activity levels, the proportion of patients in remission, and SF-36 and HAQ-DI scores did not significantly change from before the switch. Overall, patients were satisfied with the switch. Three patients (7.9%) stopped the biosimilar due to side effects. In conclusion, switching to the adalimumab biosimilar did not result in increased disease activity or worse patient-reported outcomes. Also, there was no apparent evidence of increased side effects. Patients themselves were mostly satisfied with the switching experience.
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