Effect Modification Analysis is a methodological approach in comparative risk factor analysis that identifies and quantifies how the association between a risk factor and an outcome varies across levels of a third variable, distinguishing it from other analytic techniques by specifically examining heterogeneity in effect measures across subgroups.
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Stefan Schandelmaier, Matthias Briel, Ravi Varadhan et al. · Canadian Medical Association Journal · 2020 · 717 citations · Full text
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