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Early Termination of Clinical Trials for Futility - Considerations for a Data and Safety Monitoring Board

Susan S Ellenberg1, Pamela A Shaw2

  • 1Department of Biostatistics, Epidemiology, and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia.

NEJM Evidence
|February 6, 2024
PubMed

Insights

Clinical trials may be stopped early for futility if success is unlikely. This review covers challenges Data Safety Monitoring Boards (DSMBs) face when trials lack efficacy, have missing data, or low event rates.

Area of Science:

  • Clinical trial methodology
  • Biostatistics
  • Medical research ethics

Background:

  • Clinical trials may be terminated prematurely if they demonstrate little chance of achieving their primary objective.
  • Reasons for futility include lack of treatment effect, significant missing data compromising conclusions, or insufficient event rates for statistical power.

Purpose of the Study:

  • To review the challenges encountered by Data Safety Monitoring Boards (DSMBs).
  • To examine the complexities of early termination decisions in clinical research due to futility.

Main Methods:

  • Literature review of studies and guidelines on clinical trial termination.
  • Analysis of scenarios leading to futility assessments by DSMBs.

Main Results:

  • Futility assessments require careful consideration of statistical evidence and potential biases.
  • DSMBs must navigate ethical considerations and maintain trial integrity when facing futility.

Conclusions:

  • Early termination for futility is a critical decision impacting research resources and patient safety.
  • Effective DSMB oversight is essential for responsible trial management and timely cessation when objectives are unattainable.

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