A clinical trial is also called a controlled trial.

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A clinical trial, often referred to as a controlled trial, is a research study where participants are assigned to groups to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. The term "controlled" refers to the control group that does not receive the experimental treatment, allowing for a comparison to determine the effectiveness of the intervention.

A Clinical Trial Is Also Called a Controlled Trial