Journal Article

DZNE-2025-01307

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Supplementing Single‐Arm Trials with External Control Arms—Evaluation of German Real‐World Data

Russek, M.DZNE* ; Peltner, J.DZNE* ; Haenisch, B. (Last author)DZNE*

2025
Wiley-Blackwell Hoboken, NJ

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Please use a persistent id in citations: doi:10.1002/cpt.3684

Abstract: As single-arm trials (SATs) are increasingly used in pharmaceutical research, the validity of such study designs needs to be critically assessed. We characterize the feasibility of supplementing SATs with real-world data (RWD)-derived external control arms by determining the proportion of SATs on breast cancer and amyotrophic lateral sclerosis (ALS) for which an external control arm based on RWD can be constructed. The main outcome measure is the number and percentage of trials for which all important eligibility criteria and at least one primary endpoint could be identified in one of five German RWD sources. We surveyed all SATs concerning breast cancer or ALS treatment registered in the European Union’s clinical trial registers between 2004 and 2023. Ten out of 379 breast cancer SATs and 2 of 11 ALS SATs could feasibly be supplemented with RWD-derived external control arms, if all important eligibility criteria and a primary endpoint have to be identifiable in the RWD source. Ninety-three breast cancer trials had at least one outcome ascertainable in a RWD source, and 35 trials had all important eligibility criteria recorded in a RWD source. Nine ALS trials had at least one primary endpoint ascertainable in RWD sources, and 2 had all important eligibility criteria recorded in a RWD source. Our study shows that SATs with RWD-derived external control arms will rarely be suitable to establish treatment effects of medicines in the current setting for the investigated phenotypes and that SATs should be designed with limitations of the source of external controls in mind.

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Contributing Institute(s):

1. Pharmacoepidemiology (AG Hänisch)

Research Program(s):

1. 354 - Disease Prevention and Healthy Aging (POF4-354) (POF4-354)

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Database coverage:
; ; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Clinical Medicine ; Current Contents - Life Sciences ; DEAL Wiley ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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