To determine whether baldness causes coronary heart disease (CHD) in men, a hyp cohort study was carried out. The epidemiologist in charge of the study recruited 10, men and 10,000 men with hair into the study and followed all of them for 10 years to whether they developed CHD. Results are shown below. Bald Hairy Total CHD 387 95 482 No CHD 4,613 4,905 9,518 Total 5,000 5,000 10,000

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To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical
cohort study was carried out. The epidemiologist in charge of the study recruited 10,000 bald
men and 10,000 men with hair into the study and followed all of them for 10 years to determine
whether they developed CHD. Results are shown below.
Bald
Hairy
Total
CHD
387
95
482
No CHD
4,613
4,905
9,518
Total
5,000
5,000
10,000
1. Using the table above, what is the risk ratio of CHD associated with baldness? Include
an interpretation of the Risk Ratio
2. Does the risk ratio calculated suggest that baldness may be a cause of CHD? If so, what
alternate explanation can you provide for the association between baldness and CHD?
Transcribed Image Text:To determine whether baldness causes coronary heart disease (CHD) in men, a hypothetical cohort study was carried out. The epidemiologist in charge of the study recruited 10,000 bald men and 10,000 men with hair into the study and followed all of them for 10 years to determine whether they developed CHD. Results are shown below. Bald Hairy Total CHD 387 95 482 No CHD 4,613 4,905 9,518 Total 5,000 5,000 10,000 1. Using the table above, what is the risk ratio of CHD associated with baldness? Include an interpretation of the Risk Ratio 2. Does the risk ratio calculated suggest that baldness may be a cause of CHD? If so, what alternate explanation can you provide for the association between baldness and CHD?
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