Clinical Trial Arm

A Clinical Trial Arm is an experimental unit of clinical trial participants that receives an intervention, treatment, or no intervention according to a clinical trial protocol.

• Context:
  • It can be any treatment group in clinical trial.
  • It can be assigned by a Clinical Trial Arm Assignment Task.
• Example(s):
  • an Experimental Arm,
  • an Active Comparator Arm,
  • a Placebo Comparator Arm,
  • a Sham Comparator Arm,
  • a No-Intervention Arm,
  • …
• Counter-Example(s):
  • Control Group,
  • Interest Group,
  • Placebo Group,
  • Support Group.
• See: Single-Arm Clinical Trial, Multi-Arm Clinical Trial, Placebo-Controlled Clinical Trial, Exploratory Clinical Trial, Confirmatory Clinical Trial.

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References

2021a

• (ClinicalTrials.gov, 2021) ⇒ https://www.clinicaltrials.gov/ct2/about-studies/glossary Retrieved:2021-11-14.
  • QUOTE: Arm A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.

    Arm type: A general description of the clinical trial arm. It identifies the role of the intervention that participants receive. Types of arms include experimental arm, active comparator arm, placebo comparator arm, sham comparator arm, and no intervention arm.

2021b

• (Novartis, 2021) ⇒ https://www.novartis.com/clinicaltrials/glossary-clinical-trial-terms Retrieved:2021-11-14.
  • QUOTE: Arm assignment: The assignment of a group or subgroup of participants in a clinical trial to receive interventions, or no interventions, as specified in the study protocol.

2021c

• (Stoppler, 2021) ⇒ https://www.medicinenet.com/arm/definition.htm Reviewed on 3/29/2021
  • QUOTE: (...) In a randomized clinical trial, any of the treatment groups. Most randomized trials have two "arms," but some have three "arms," or even more.

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