Evidence-Based Practice / Unit 6 EBP 0834 short lesson, about 20 seconds
Relative Risk
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The idea
Relative risk, or risk ratio, divides one group's absolute risk by the other's, giving how many times more or less likely the outcome was.
In practice
A risk of three in a hundred against two in a hundred: one and a half times.
Where people slip
Relative risk is used in prospective studies — trials and cohort studies — because both risks can be calculated from them.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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