Evidence-Based Practice / Unit 6 EBP 0841 short lesson, about 20 seconds
Odds Ratio and Relative Risk Can Look Alike
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The idea
When an outcome is uncommon, the odds ratio and the relative risk come out at similar values.
In practice
Two measures of the same rare outcome returning nearly the same figure.
Where people slip
Similar values do not make them the same measure. As the outcome becomes common they diverge, and the odds ratio looks the larger.
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