Pragmatic and Group-Randomized Trials in Public Health and Medicine

This seven-part, self-paced online course from the NIH Office of Disease Prevention provides an overview of group-randomized trials (GRTs), also called cluster-randomized trials, a type of comparative studies designed to evaluate interventions that operate at a group level, change the physical or social environment, or cannot be delivered to individuals without substantial risk of contamination.

Content includes an overview of GRTs, study design, analysis approaches, power and sample size issues, and alternative designs. Prior training in basic research design and regression methods is recommended.

Access this online course through the NIH Office of Disease Prevention website.



Target Audience

Graduate Students
Medical and Veterinary Trainees
Postdoctoral Fellows and Scholars

Delivery Method


RCR Credit

0 Credit(s)