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Lupus trials and tribulations: are outcome measures the problem?
1Amsterdam University Medical Center, Amsterdam, The Netherlands.
EULAR Rheumatology Open
|August 1, 2026
Summary
Clinical trials for systemic lupus erythematosus (SLE) face high failure rates, particularly in Phase III, due to problematic outcome measures. New approaches are needed to improve trial success and align with modern treatment goals.
Area of Science:
- Rheumatology
- Clinical Trial Design
- Translational Medicine
Background:
- Randomized clinical trials (RCTs) in systemic lupus erythematosus (SLE) exhibit concerningly high failure rates.
- Phase III SLE trials have a higher failure rate than Phase II trials, contradicting typical drug development logic.
- Discrepancies in outcomes within and between trials suggest issues with current measurement tools.
Purpose of the Study:
- To analyze the reasons behind the high failure rates of clinical trials in SLE.
- To evaluate the suitability of current outcome measures, such as SRI-4 and BICLA, in SLE trials.
- To discuss emerging strategies and initiatives aimed at improving SLE clinical trial design and outcome assessment.
Main Methods:
- Review of clinical trial data and outcomes in systemic lupus erythematosus.
- Analysis of the performance of common outcome measures like SRI-4 and BICLA.
- Discussion of proposed changes and ongoing initiatives in SLE trial methodology.
Main Results:
- Phase III trials in SLE are more prone to failure than Phase II trials.
- Existing outcome measures (SRI-4, BICLA) may not align with the 'treat-to-target' therapeutic approach.
- Complexity and lack of clinical applicability of current measures contribute to trial difficulties.
Conclusions:
- Outcome measures are a significant factor contributing to the challenges in achieving successful SLE clinical trials.
- There is a critical need to revise and develop more clinically relevant and logical outcome measures for SLE research.
- Ongoing and future trials may lead to a paradigm shift in how clinical trial outcomes are assessed in SLE.
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