What this means in a clinic conversation
A comparator may be usual care, another treatment or a placebo. Improvement within the treatment group answers a different question from improvement relative to the control group.
A question to bring
What did the comparison group receive, and how did the groups differ at follow-up?
Open the visit checklist →Related and commonly confused terms
Use the term in context
Sources and editorial context
This definition was compiled from the sources below and has not received independent clinical review. It supports understanding and consultation preparation.
- NCI Dictionary: control group · National Cancer InstituteReference checked 2026-10-02