Optimal response and covariate-adaptive biased-coin designs for clinical trials with continuous multivariate or longitudinal responses

Anthony C. Atkinson and Atanu Biswas

Computational Statistics & Data Analysis, 2017, vol. 113, issue C, 297-310

Abstract: Adaptive randomization of the sequential construction of optimum experimental designs is used to derive biased-coin designs for longitudinal clinical trials with continuous responses. The designs, coming from a very general rule, target pre-specified allocation proportions for the ranked treatment effects. Many of the properties of the designs are similar to those of well-understood designs for univariate responses. A numerical study illustrates this similarity in a comparison of four designs for longitudinal trials. Designs for multivariate responses can likewise be found, requiring only the appropriate information matrix. Some new results in the theory of optimum experimental design for multivariate responses are presented.

Keywords: Biased-coin design; Covariate balance; Effective number of observations; Ethical allocation; Equivalence theorem; Multivariate DA-optimality; Multivariate loss; Power; Skewed allocation (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:csdana:v:113:y:2017:i:c:p:297-310

DOI: 10.1016/j.csda.2016.05.022

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