Design the suitable 2 x 2 table, compute and interpret the proper measure of association.
You suspect that the relationship between alcohol use and CHD might be confounded through smoking. You collect the given data:
Compute the proper measure of relationship between alcohol use and CHD in both smokers and non-smokers. Describe whether smoking was a confounder of the association. Describe the relationship of alcohol which use to CHD after controlling for the confounding?