Relative risk ratio

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Revision as of 13:59, 5 January 2009 by imported>Robert Badgett (Relative risk moved to Relative risk ratio)
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In clinical epidemiology and evidence-based medicine, the relative risk or relative risk ratio, is a measure of the likelihood of a clinical outcome in group of patients exposed to a factor compared to a control group of patients.[1] This measure should be contrasted with the absolute risk reduction.

Calculations

Two-by-two table for a randomized-controlled trial or cohort study
Outcome
Present Absent
Experimental group Cell A Cell B Total in the experimental group
Control group Cell C Cell D Total in the control group
Total with the outcome Total without the outcome

Note that the relative risk ratio is that same as 1 - the relative risk reduction.

References

See also