Bayesian adaptive basket trial design using model averaging. (20th May 2019)

• Record Type: Journal Article
• Authors: Psioda, Matthew A; Xu, Jiawei; Jiang, Qi; Ke, Chunlei; Yang, Zhao; Ibrahim, Joseph G
• Is Part Of: Biostatistics. Volume 22:Number 1(2021)
• Page Start: 19
• Page End: 34
• Publication Date: 2019-05-20
• Subjects: Adaptive design -- Basket trials -- Bayesian model averaging -- Clinical trial design; Medical statistics -- Periodicals; Biometry -- Periodicals; Health risk assessment -- Periodicals; Medicine -- Research -- Statistical methods -- Periodicals; 610.727
• DOI: 10.1093/biostatistics/kxz014
• Languages: English
• ISSNs: 1465-4644

Abstract

Summary: In this article, we develop a Bayesian adaptive design methodology for oncology basket trials with binary endpoints using a Bayesian model averaging framework. Most existing methods seek to borrow information based on the degree of homogeneity of estimated response rates across all baskets. In reality, an investigational product may only demonstrate activity for a subset of baskets, and the degree of activity may vary across the subset. A key benefit of our Bayesian model averaging approach is that it explicitly accounts for the possibility that any subset of baskets may have similar activity and that some may not. Our proposed approach performs inference on the basket-specific response rates by averaging over the complete model space for the response rates, which can include thousands of models. We present results that demonstrate that this computationally feasible Bayesian approach performs favorably compared to existing state-of-the-art approaches, even when held to stringent requirements regarding false positive rates.