Determine if there is multiplicative interaction present by 1) computing the effects within the strata of Z and 2) computing the joint and observed effects Observed Incidence Rates No A A No Z 5 20 Z 10 40
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Step 1:** Calculate the incidence rate ratio within the strata of Z: - For Z = No: Incidence rate ratio = 20/5 = 4 - For Z = Yes: Incidence rate ratio = 40/10 = 4 ** Show more…
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