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[The stepped wedge design].

Olaf M Dekkers1

  • 1Leids Universitair Medisch Centrum, afd. Klinische epidemiologie, Leiden, the Netherlands. o.m.dekkers@lumc.nl

Nederlands Tijdschrift Voor Geneeskunde
|March 1, 2012
PubMed
Summary
This summary is machine-generated.

The stepped wedge cluster design offers a unique approach to medical research when standard trials are not feasible. This randomized study design implements interventions in stages, suitable for ethical or logistical considerations.

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Area of Science:

  • Medical research methodology
  • Epidemiology
  • Clinical trials

Context:

  • Standard randomized controlled trials (RCTs) may not be suitable for all research questions.
  • Patient-level randomization can be inappropriate or impossible in certain medical research scenarios.
  • Ethical, logistical, or financial factors may necessitate a phased implementation of interventions.

Purpose:

  • To introduce the stepped wedge cluster design as an alternative to standard trials.
  • To outline the applicability of the stepped wedge design in specific research contexts.
  • To highlight key considerations for the statistical analysis and ethical implementation of this design.

Summary:

  • The stepped wedge cluster design is a form of randomized study where interventions are rolled out in stages across groups.
  • It is particularly useful when patient-level randomization is not feasible and phased implementation is required.
  • The period before intervention in each cluster serves as a control, and analysis must account for within-cluster similarities.

Impact:

  • Provides a robust framework for evaluating interventions when traditional methods are challenging.
  • Facilitates ethical and practical implementation of group-level interventions.
  • Informs best practices for statistical analysis and ethical considerations in stepped wedge trials.