A nationwide non-medical switch from originator infliximab to biosimilar CT-P13 in 802 patients with inflammatory arthritis: 1-year clinical outcomes from the DANBIO registry

Bente Glintborg, Inge Juul Sørensen, Anne Gitte Loft, Hanne Lindegaard, Asta Linauskas, Oliver Hendricks, Inger Marie Jensen Hansen, Dorte Vendelbo Jensen, Natalia Manilo, Jakob Espesen, Mette Klarlund, Jolanta Grydehøj, Sabine Sparre Dieperink, Salome Kristensen, Jimmi Sloth Olsen, Henrik Nordin, Stavros Chrysidis, Dorte Dalsgaard Pedersen, Michael Veedfald Sørensen, Lis Smedegaard AndersenKathrine Lederballe Grøn, Niels Steen Krogh, Lars Pedersen, Merete Lund Hetland, all departments of rheumatology in Denmark

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

OBJECTIVES: According to guidelines, a nationwide non-medical switch from originator (INX, Remicade) to biosimilar infliximab (Remsima, CT-P13) was conducted in Danish patients with rheumatoid arthritis (RA), psoriatic arthritis (PsA) and axial spondyloarthritis (AxSpA). We investigated disease activity before/after switching and retention rates in the DANBIO registry.

METHODS: Disease activities 3 months before and after switch and changes over time were calculated. Flare was defined as change in 28 Joint Disease Activity Score (∆DAS28) ≥1.2 (RA/PsA) or Ankylosing Spondylitis Disease Activity Score (∆ASDAS) ≥1.3 (AxSpA). Crude and adjusted retention rates were compared with a historic cohort of INX-treated patients.

RESULTS: Eight hundred and two patients switched (403 RA/120 PsA/279 AxSpA; 51% women, age (median (IQR): 55 (44-66)) years). Follow-up was 413 (339-442) days. Prior INX treatment duration was 6.8 (4.3-9.5) years. Disease activities were similar 3 months before/after switch. Crude 1-year CT-P13 retention rate (84.1 (95% CI 81.3 to 86.5)) was similar to the historic IFX cohort (86.2 (95% CI 84.0 to 88.0), p=0.22). The adjusted absolute retention rates were 83.4 (95% CI 80.8 to 86.2) and 86.8% (95% CI 84.8 to 88.8), respectively (p=0.03). In total 132 patients withdrew (lack of effect: 71/132=54%, adverse events: 37/132=28%). Patients with previous INX treatment duration >5 years had longer CT-P13 retention.

CONCLUSION: In 802 arthritis patients treated with INX for median >6 years, a nationwide non-medical switch to CT-P13 had no negative impact on disease activity. Adjusted 1-year CT-P13 retention rate was slightly lower than for INX in a historic cohort.

OriginalsprogEngelsk
TidsskriftAnnals of the Rheumatic Diseases
Vol/bind76
Udgave nummer8
Sider (fra-til)1426-1431
ISSN0003-4967
DOI
StatusUdgivet - aug. 2017

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