To implement stratified models, follow these general steps: 1. Identify Confounders: Determine which variables might confound the relationship between the primary exposure and the outcome. 2. Divide Data into Strata: Split the data based on the levels of the confounding variable(s). 3. Analyze Each Stratum: Conduct separate analyses within each stratum. 4. Combine Results: Use methods like Mantel-Haenszel to combine stratum-specific estimates into a single summary measure.
