Regression · Interpretation scales
An Odds Ratio Is Not a Risk Ratio
The same odds ratio can imply very different changes in probability, depending on where the comparison begins.
Page 1 of 7 · Big Picture
The big picture: An Odds Ratio Is Not a Risk Ratio
Why does an odds ratio depend on baseline risk when translated to probability?
Why a policy analyst should care
An odds ratio is native to a logistic model, but policy decisions often require predicted probabilities or people affected; translating between those scales requires the baseline probability.
Follow the idea from the opening question to a practical decision. These are the conceptual moves this module will develop:
1 Question One odds ratio, one policy meaning?
2 Explore Hold the odds ratio fixed
3 Formalize Move from odds to probability
4 Transfer Translate a real NHIS comparison
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