étude à deux bras → two-arm study

[Frederique]

étude à deux bras → two-arm study

A group of people in a clinical study who receive the same intervention. Clinical studies may have two or more research arms. For example, often in a Phase III study people in one arm receive the standard treatment and people in another arm receive the investigational, or new, treatment.
http://www.seattlecca.org/clinical-trial-definitions.cfm