title: Combining adaptive designs with control of the false discovery rate--a generalized definition for a global p-value.
abstract: When combining adaptive designs with control of the False Discovery Rate one has to keep in mind that the most frequently used procedure for controlling the False Discovery Rate--the explorative Simes procedure--is a stepwise multiple testing procedure. At the interim analysis of an adaptive design it is however not yet known what the boundaries for rejection of hypotheses in the final analysis will be as these boundaries depend on the size of the final p-values. Therefore classical adaptive designs with a predefined stopping criterion for early rejection of hypotheses are not well suited. We propose a generalized definition of a global p-value for a two-stage adaptive design permitting a flexible decision for stopping at the interim analysis. By means of a simulation study in the field of genetic epidemiology we illustrate how applying such a two-stage design can reduce costs.
authors.affiliation: Institut für Medizinische Biometrie, Epidemiologie und Informatik, Obere Zahlbacher Strasse 69, 55101 Mainz, Germany. victor@imbei.uni-mainz.de
authors.forename: Anja
authors.initials: A
authors.lastname: Victor
authors.forename: Gerhard
authors.initials: G
authors.lastname: Hommel
mesh_terms: D003198:Computer Simulation; D016001:Confidence Intervals; D003627:Data Interpretation, Statistical; D005828:Genetics, Population / Q000706:statistics & numerical data; D008957:Models, Genetic