Relative risk
What it is
Relative risk compares the probability of an outcome between two groups using a ratio.
What it does
A ratio of 1 indicates equal observed risks.
Research context and ingredient forms
Its meaning requires the outcome, time period, and baseline risk.
Using this information
In an illustrative comparison of 2% versus 1%, relative risk is 2, while the absolute difference is 1 percentage point. Report both perspectives when possible.
Scientific Research & References
- NCI Dictionary of Cancer Terms: relative risk
National Cancer Institute
Limitations: Terminology support only; not evidence of benefit for a particular intervention.
Source assessment recorded.
Related dictionary entries
Products containing it
No label-specific product relationship has been reviewed for this entry.