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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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