Project #27555 - statistics

I am willing to pay \$35.00.  If you are asking for more money please do not respond as it is only two questions.

1.

• The relationship between cigarette smoking and lung cancer was conducted in a case-control study with 700 cases and 425 controls. Using the results below, calculate the crude odds ratio and explain what the ratio means:

·         Heavy Smoking—Cases: 450; Controls: 200

·         Not Heavy Smoking—Cases: 250; Controls: 225

2.

• A case-control study looked at the association of alcohol use with the occurrence of coronary heart disease (CHD). There were 300 participants in the study (150 cases and 150 controls). Of the cases, 90 participants drank alcohol; of the controls, 60 participants drank alcohol.

Design the appropriate 2x2 table, calculate and interpret the appropriate measure of association.

You suspect that the association between 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

Calculate the appropriate measure of association between alcohol use and CHD in   both smokers and non-smokers. Discuss whether smoking was a confounder of the association. What is the relationship of alcohol use to CHD after controlling for confounding?

 Subject Mathematics Due By (Pacific Time) 04/13/2014 07:00 pm
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