Optimal designs for dose-response models with restricted design spaces


Biedermann, Stefanie, Dette, Holger and Zhu, Wei (2006) Optimal designs for dose-response models with restricted design spaces Journal of the American Statistical Association, 101, (474), pp. 747-759. (doi:10.1198/016214505000001087).

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Description/Abstract

In dose-response studies, the dose range is often restricted due to concerns over drug toxicity and/or efficacy. We derive optimal designs for estimating the underlying dose-response curve for a restricted or unrestricted dose range with respect to a broad class of optimality criteria. The underlying curve belongs to a diversified set of link functions suitable for the dose response studies and having a common canonical form. These include the fundamental binary response models -- the logit and the probit as well as the skewed versions of these models. Our methodology is based on a new geometric interpretation of optimal designs with respect to Kiefer's $\Phi_p$-criteria in regression models with two parameters, which is of independent interest. It provides an intuitive illustration of the number and locations of the support points of $\Phi_p$-optimal designs. Moreover, the geometric results generalize the classical characterization of $D$-optimal designs by the minimum covering ellipsoid [see Silvey (1972) or Sibson (1972)] to the class of Kiefer's $\Phi_p$-criteria. The results are illustrated through the re-design of a dose ranging trial.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1198/016214505000001087
ISSNs: 0162-1459 (print)
Related URLs:
Keywords: Binary response model, Dose ranging, Dose-response, Dual problem, Link function, Locally compound optimal design, Minimum ellipse
Subjects:
Organisations: Statistics
ePrint ID: 41816
Date :
Date Event
1 June 2006Published
Date Deposited: 05 Oct 2006
Last Modified: 16 Apr 2017 18:58
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/41816

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