Pragmatic and Group-Randomized Trials in Public Health and Medicine

A 7-part online course to help researchers design and analyze group-randomized trials (GRTs). It includes video presentations, slide sets, suggested reading materials, and guided activities.

Course Videos

Course References (PDF)

Questions about the course? Email GRT@mail.nih.gov
 

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Considering a trial that randomizes groups or clusters
or that delivers interventions to groups?

Check out NIH's Research Methods Resources website
to find additional background, references, and tools about using
these study designs, including a sample size calculator for GRTs.