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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. describe what is the relationship of alcohol use to CHD after controlling for confounding?

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