Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/25007
Authors: 
Dette, Holger
Trampisch, Matthias
Hothorn, Ludwig A.
Year of Publication: 
2007
Series/Report no.: 
Technical Report // Sonderforschungsbereich 475, Komplexitätsreduktion in Multivariaten Datenstrukturen, Universität Dortmund 2007,22
Abstract: 
In this paper, we describe an adjusted method to facilitate a non-inferiority trial by a three-arm robust design. Because local optimal designs derived in Hasler et al. [2007] require knowledge about the ratios of the population variances and are not necessarily robust with respect to possible misspecifications, a maximin approach is adopted. This method requires only the specification of an interval for the of variance ratios and yields robust and efficient designs. We demonstrate that a maximin optimal design only depends on the boundary points specified for the intervals of the variance ratios and receive numerical and analytical solutions. The derived designs are robust and very efficient for statistical analysis in non inferiority three arm trials.
Subjects: 
maximin design
robust design
non-inferiority
three arm design
gold design trials
randomized clinical trial
Document Type: 
Working Paper

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