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MATLAB: An Introduction with Applications

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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**Study Summary:**

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.

**Table:**

| | CHD | No CHD | Total |
|------------|-----|--------|--------|
| Bald | 387 | 4,613 | 5,000 |
| Hairy | 95 | 4,905 | 5,000 |
| **Total** | 482 | 9,518 | 10,000 |

**Questions:**

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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