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An adaptive method for establishing a dose-response relationship

P Bauer1, J Röhmel

  • 1Department of Medical Statistics, University of Vienna, Austria.

Statistics in Medicine
|July 30, 1995
PubMed
Summary
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This study introduces a multistage sampling method for dose-response trials, enabling adaptive dose adjustments. The method allows for early stopping to confirm dose-response relationships, potentially without placebo controls.

Area of Science:

  • Biostatistics
  • Clinical Trial Design
  • Pharmacometrics

Background:

  • Establishing dose-response relationships is crucial in drug development.
  • Traditional methods may lack flexibility in dose adaptation during trials.
  • Placebo controls can raise ethical concerns and increase trial duration.

Purpose of the Study:

  • To propose a novel multistage sampling method for dose-response trials.
  • To enable adaptive dose adjustments in preplanned interim analyses.
  • To develop a procedure for establishing dose-response relationships without placebo use.

Main Methods:

  • A multistage sampling approach with adaptive dose adjustments.
  • Fisher's product criterion for combining p-values from disjoint samples.

Related Experiment Videos

  • Decision boundaries for early stopping and hypothesis rejection.
  • Power comparison via extensive simulations against linear trend tests.

    • Main Results:

    • The proposed adaptive procedure demonstrates comparable or superior power to traditional methods.
    • Bias in estimation was quantified for the adaptive procedure.
    • The method allows for early rejection of the null hypothesis of no dose-response relationship.

    Conclusions:

    • The multistage adaptive sampling method is effective for dose-response trials.
    • This approach offers flexibility and potential efficiency gains.
    • It provides a viable alternative to placebo-controlled designs for establishing dose-response relationships.