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Updated: Sep 7, 2025

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
Using surrogate information to improve confirmatory platform trial with sample size re-estimation
Chengxue Zhong1, Qing Li2, Liwen Wu3
1Department of Biostatistics and Data Science, Biostatistics, University of Texas Health Science Center at Houston, Houston, Texas, USA.
Abstract:
Platform design which allows exploring multiple arms with a common control simultaneously is becoming essential for efficient drug development. However, one of the critical challenges for confirmatory platform trials is immature data for interim decisions, particularly for the treatment arm selection and sample size determination with limited data available. We use a modified conditional power (CP) for both treatment arm selection and sample size determination at interim analysis for the proposed platform trial. The modified CP uses the available data from both primary and surrogate endpoints. We also demonstrated the application in a case study of a lung cancer trial.
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