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| Block 1: Epidemiology |
| EPI3-8: MEASURES OF EFFECT: INTERPRETING THE RELATIVE RISK |
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| Block 1: Epidemiology |
| EPI3-8: MEASURES OF EFFECT: INTERPRETING THE RELATIVE RISK |
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SESSION OBJECTIVE |
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At the end of this session you should be able to understand the meaning of the magnitude of relative measures of effect (or relative risk) in relation to the number "1" which is the measure of no effect. |
There are 3 possibilities for the size of the Relative Risk, RR, relative to baseline or 1 (exposed have the same risk as the unexposed)
RR = 1
RR > 1
RR < 1
In the case of RR = 1, it means that there is no association between exposure and disease.
If RR > 1, there is a positive association which may be causal. We say that exposure "causes" disease.
If RR < 1, there is a negative association which may be causal. We say that exposure "protects" against disease.
