ArticlePharmaceutical medicine2025
Treatment Persistence in Rheumatoid Arthritis Before and After Etanercept Biosimilar Introduction: A Nationwide Australian Real-World Study.
Article in Pharmaceutical medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
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Who cites it
3 citing papers in PubMed.
- Ten-Year Public Expenditure Savings Associated with TNF Inhibitor Biosimilars under Australia's Pharmaceutical Benefits Scheme.Clinical pharmacology and therapeutics · 2026Article
- Data Resource Profile: Australia's Person Level Integrated Data Asset (PLIDA).International journal of epidemiology · 2026Article
- Persistence and effectiveness of upadacitinib and TNFi for rheumatoid arthritis using pooled data from Canadian and Swiss registries.Rheumatology (Oxford, England) · 2026Observational
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
backgroundAustralia has one of the highest rates of rheumatoid arthritis (RA) worldwide. Etanercept, a widely used biologic for severe RA, has had a publicly subsidised biosimilar available in Australia since 2017. However, real-world data on how biosimilar availability has affected treatment patterns remain limited.
objectiveThis study aimed to assess treatment persistence-a surrogate measure of long-term treatment effectiveness-with etanercept before and after public subsidy of its biosimilar for RA, utilising a national sample.
methodsThis retrospective cohort study analysed national healthcare claims data from the Pharmaceutical Benefits Scheme (PBS) via the Australian Bureau of Statistics DataLab. Adults (age ≥ 18 years) initiating etanercept for severe RA were stratified into two cohorts: historical (before biosimilar PBS listing, comprising only originator users) and contemporary (after biosimilar PBS listing, comprising both biosimilar and originator users). Kaplan-Meier analysis and multivariate Cox regression were employed to assess treatment persistence. Subgroup analysis of older adults and sensitivity analysis limited to biologic-naïve individuals were also performed.
resultsA total of 10,234 individuals initiating etanercept for severe RA were included, with 4461 in the historical cohort and 5773 in the contemporary cohort. The median time to treatment discontinuation was 10.0 months (95% confidence interval (CI) 9.7-10.6) in the contemporary cohort and 10.6 months (95% CI 10.0-11.4) in the historical cohort (p = 0.08). At 12 and 24 months, treatment retention rates were similar between cohorts. The adjusted hazard ratio for treatment discontinuation in the contemporary cohort was 1.00 (95% CI 0.96-1.05), indicating no significant differences. Subgroup and sensitivity analyses yielded similar results.
conclusionThis large, population-based study found no significant difference in treatment persistence following the introduction of the etanercept biosimilar in Australia. These findings support the real-world integration of biosimilars into routine care. Further research should include direct comparative analyses of originator and biosimilars to inform long-term treatment strategies, clinician confidence, and sustainable healthcare policy.
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