Computation and interpretation of odds ratio
Plan the appropriate 2x2 table, compute and interpret the appropriate measure of association.
You suspect that the association among alcohol use and CHD might be confounded by smoking. You collect the following data
|
|
Smokers
|
Non-Smokers
|
|
|
CHD
|
No CHD
|
CHD
|
No CHD
|
|
Alcohol Use
|
80
|
40
|
10
|
20
|
|
No Alcohol Use
|
20
|
10
|
40
|
80
|
Compute the appropriate measure of association between alcohol use and CHD in both smokers and non-smokers. Deliberate whether smoking was a confounder of the association. Explain what is the relationship of alcohol use to CHD after controlling for confounding?