Arm

What does "Arm" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

In the context of medicine, an "arm" refers to a group of participants in a clinical trial. Each arm receives a different treatment, or a placebo, which is a substance that has no therapeutic effect. This allows researchers to compare the effects of different treatments or interventions. The term "arm" does not refer to a physical body part in this context.

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