e two way table below provides findings of a rrandomized clinical trial testing
ID: 3323731 • Letter: E
Question
e two way table below provides findings of a rrandomized clinical trial testing the effect of Aspirin intake on the risk of heart attack.
Yes Heart Attack
No Heart Attack
Total
Aspirin
104
10,933
11,037
Placebo
189
10,845
11,034
total
293
21,778
22,071
Based on data presented in the table, which of the following is true?
The risk of heart attacks for the treatment group is reduced by about 82%.
The risk of heart attacks for the treatment group is decreased by about 45%.
The risk of heart attacks for the treatment group is decreased by about 55%.
Yes Heart Attack
No Heart Attack
Total
Aspirin
104
10,933
11,037
Placebo
189
10,845
11,034
total
293
21,778
22,071
Explanation / Answer
Decrease in risk = 189 - 104 = 85
Percentage reduction in risk = 85/189 x 100 = 45%
C. The risk of heart attacks for the treatment group is decreased by about 45%.
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