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Assessing the hierarchical beta-binomial model as a basic information sharing tool in basket trials.

Moritz Pohl1, Lukas D Sauer1, Meinhard Kieser1

  • 1Institute of Medical Biometry, University of Heidelberg, Heidelberg, Germany.

Journal of Biopharmaceutical Statistics
|September 27, 2024
PubMed
Summary
This summary is machine-generated.

A hierarchical beta-binomial model offers a simpler, more interpretable alternative for statistical information sharing in basket trials compared to complex logit-transformed models.

Keywords:
Basket trialBayescomparison of methodshierarchical modelsimulation

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Area of Science:

  • Biostatistics
  • Clinical Trial Design

Background:

  • Current basket trial statistical methods predominantly use Bayesian hierarchical models with logit-transformed response rates.
  • This logit-transformation complicates model interpretation and application in clinical settings.

Purpose of the Study:

  • To investigate the hierarchical beta-binomial model as a practicable alternative to logit-transformed models for information sharing in basket trials.
  • To systematically compare the two modeling approaches for their suitability in clinical trial design.

Main Methods:

  • Systematic comparison of distributional assumptions and Bayesian behavior of beta-binomial and logit-transformed models.
  • Development of a calibration procedure for setting comparable priors across models.
  • Derivation of an evaluation measure for assessing the sharing property in simulation studies.

Main Results:

  • The hierarchical beta-binomial model demonstrates a feasible approach for information sharing in basket trials.
  • The beta-binomial model offers improved interpretability compared to logit-transformed models.
  • A novel evaluation measure was developed to assess the sharing property.

Conclusions:

  • The hierarchical beta-binomial model is a viable and less complex alternative for statistical information sharing in basket trials.
  • This approach enhances model understanding for stakeholders in clinical research.
  • Further adoption of the beta-binomial model could streamline basket trial methodologies.