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Methods: Using BSRBR-RA, those who switched directly from etanercept originator to biosimilar were identified and matched to patients receiving originator, based on gender, age, disease duration, originator start year. Drug survival was calculated; Cox-proportional hazard models assessed differences in drug persistence between those who switched versus remaining on originator. Change in DAS28 after six and 12-months was compared between cohorts. Multiple imputation was used.
Results: 1024 adults with RA switching from etanercept originator to biosimilar were included, with a matched cohort of patients remaining on originator. Patients who switched onto a biosimilar product were no more likely to discontinue etanercept treatment versus those who remained on originator; hazard ratio 1.06 (95%CI 0.89-1.26), with 65% of patients remaining on treatment at three years. Ninety-five (9%) patients switched back to originator within the first year. After six and 12-months, biosimilar patients were no more likely to have a worsening of DAS28 (>0.6units) compared with those who remained on originator.
Conclusions: This is the largest matched comparative effectiveness analysis showing patients switched from etanercept originator to biosimilar appear to do just as well with regards to disease activity and drug persistence compared with those who remained on originator. These data will be reassuring to clinicians and patients regarding non-medical switching.
|Publication status||Accepted/In press - 31 Aug 2023|
- Rheumatoid Arthritis
- Biologic therapy
- disease activity
FingerprintDive into the research topics of 'Outcomes following switching from etanercept originator to etanercept biosimilar in 1024 RA patients: A matched-analysis of the BSRBR-RA.'. Together they form a unique fingerprint.
Bruce, I., Lord, G., Lennon, R., Black, G., Wedge, D., Morris, A., Hussell, T., Sharrocks, A., Stivaros, S., Buch, M., Gough, J., Kostarelos, K., Thistlethwaite, F., Kadler, K., Barton, A., Hyrich, K., Mcbeth, J., O'Neill, T., Vestbo, J., Simpson, A., Singh, S., Smith, J., Felton, T., Murray, C., Griffiths, C., Cullum, N., Rhodes, L., Warren, R., Paus, R., Dumville, J., Viros Usandizaga, A., Keavney, B., Tomaszewski, M., Allan, S., Body, R., Cartwright, E., Heagerty, A., Kalra, P., Miller, C., Rutter, M., Smith, C., Trafford, A., Evans, D., Crosbie, E., Crosbie, P., Harvie, M., Howell, S., Renehan, A., Dive, C., Blackhall, F., Landers, D., Krebs, M., Cook, N., Clarke, R., Taylor, S., Jorgensen, C., Lorigan, P., Jayson, G., Valle, J., Mccabe, M., Armstrong, A., Freitas, A., Illidge, T., Choudhury, A., Hoskin, P., West, C., Van Herk, M., Faivre-Finn, C., Bristow, R., Kirkby, K., Birtle, A., Mackay, R., Radford, J., Linton, K., Higham, C., Munro, K., Plack, C., Arden Armitage, C., Bruce, I., Moore, D., Saunders, G., Stone, M., Haddock, G., Lewis, S., Elliott, R., Green, J., Lovell, K., Morrison, A., Shaw, J., Bucci, S., Ainsworth, J., Webb, R., Newman, W., Banka, S., Clayton-Smith, J., Payne, K., Moldovan, R., Wynn, R. & Jones, S.
1/12/22 → 30/11/27