Attributable Risk A hypothetical cohort study looked at the association between
ID: 3299169 • Letter: A
Question
Attributable Risk
A hypothetical cohort study looked at the association between family history and the risk of developing Alzheimer’s disease. The results were as follows:
Alzheimer’s Disease
No Alzheimer’s Disease
Totals
Incidence of AD
Family History
50
1,950
2,000
25 per 1,000
No Family History
25
2,975
3,000
8.3 per 1,000
1. Calculate the attributable risk for Alzheimer’s disease due to family history. Interpret the calculation in words. (must show work)
Alzheimer’s Disease
No Alzheimer’s Disease
Totals
Incidence of AD
Family History
50
1,950
2,000
25 per 1,000
No Family History
25
2,975
3,000
8.3 per 1,000
Explanation / Answer
The attributable risk for Alzheimer's disease due to family history
2000/50 + 3000/25 =160
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