Question 2 (Interactions in Logistic Regression). Using the model with history of high blood pressure, age, ST-elevation, and chest pain, we are interested in exploring whether or not the relationship

between chest pain and in-hospital mortality is modified by the presence of ST-elevation. 2a. Write the model equation (in terms of log odds) that you will use to assess for effect modification. (1 point) 2b. Fit this model and report beta-coefficients and p-values (OK to just copy and paste Stata/Routput here). Based on the p-value, is evidence that the relationship between chest pain and in-hospital mortality is modified by ST-elevation? (1 point) 2c. Use the output from 2b. Among those without ST-elevation, what is the OR of in-hospital mortality for those with chest pain compared to those without chest pain? (1 point) 2d. Use the output from 2b. Among those with ST-elevation, what is the OR of in-hospital mortality for those with chest pain compared to those without chest pain? (1 point) 2e. Interpret the ORs from 2c and 2d and comment on how they compare to each other. (1 point)