> ## Documentation Index
> Fetch the complete documentation index at: https://glossary.micahealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sham comparator arm

A group of study participants who receive a fake version of a procedure or device that looks like the real treatment but has no active components.

[*Source*](https://clinicaltrials.gov/study-basics/glossary)