HW10.Data analysis
- Due Apr 20, 2023 at 11:59pm
- Points 100
- Questions 15
- Available after Apr 14, 2023 at 1pm
- Time Limit None
Instructions
Keep the following scenarios available as you answer the Homework Questions.
Scenario A: A prospective cohort study evaluated the association between hypertension (E) and stroke (D). The data were examined in three separate stratified analyses. Analysis A stratified according to race; analysis B stratified according to age, and analysis C stratified according to sex. Calculate the stratum-specific and crude (overall) measure of association (HINT: you can use Open Epi).
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Analysis A |
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White |
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Black |
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E+ |
E- |
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E+ |
E- |
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D+ |
194 |
24 |
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D+ |
6 |
26 |
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D- |
606 |
76 |
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D- |
194 |
874 |
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800 |
100 |
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200 |
900 |
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Analysis B |
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Young age |
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Old age |
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E+ |
E- |
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E+ |
E- |
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D+ |
12 |
45 |
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D+ |
188 |
5 |
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D- |
188 |
755 |
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D- |
612 |
195 |
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200 |
800 |
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800 |
200 |
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Analysis C |
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Men |
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Women |
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E+ |
E- |
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E+ |
E- |
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D+ |
160 |
40 |
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D+ |
40 |
10 |
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D- |
240 |
360 |
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D- |
560 |
590 |
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400 |
400 |
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600 |
600 |
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Scenario B: An investigator was interested in examining the association between dietary calcium intake and bone fractures. Although the a priori criteria were met for alcohol consumption before the start of the study, alcohol consumption was NOT found to be acting as a confounder affecting the association between calcium and bone fracture in the study data. Nevertheless, it was confirmed that in this study population alcohol consumption was a risk factor for bone fracture.