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Related Experiment Videos

Some new multiple-test procedures for dose finding

C W Dunnett1, A C Tamhane

  • 1Department of Mathematics and Statistics, McMaster University, Hamilton, Ontario, Canada. dunnett@mcmail.cis.mcmaster.ca

Journal of Biopharmaceutical Statistics
|September 19, 1998
PubMed
Summary
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This study introduces improved step-down procedures for dose-response studies, enhancing the ability to identify the minimum effective dose. New methods incorporating Bartholomew's test and novel contrasts show superior performance across various dose-response profiles.

Area of Science:

  • Biostatistics
  • Pharmacometrics
  • Statistical Methods

Background:

  • Previous work focused on step-down tests for minimum effective dose determination.
  • Existing procedures had limitations in handling certain types of contrasts while controlling error rates.

Purpose of the Study:

  • To evaluate global tests (Bartholomew, Hayter) within step-down procedures.
  • To propose a novel step-down procedure accommodating a broader class of contrasts.
  • To compare the performance of new and existing step-down procedures via simulation.

Main Methods:

  • Utilized Bartholomew's and Hayter's global tests in step-down procedures.
  • Developed a new step-down procedure for step and modified basin contrasts.
  • Conducted a simulation study comparing eight step-down procedures.

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Main Results:

  • The step-down procedure using Bartholomew's test demonstrated strong performance.
  • The new step-down procedure with step and modified basin contrasts was highly effective.
  • These two procedures generally outperformed others across diverse dose-response profiles.

Conclusions:

  • Bartholomew's test-based step-down procedure is a robust option.
  • The novel step-down procedure expands analytical capabilities for dose-response studies.
  • These advanced methods improve the identification of minimum effective dose.