This table summarizes the results from along+termrandomized clinicaltrial to determine whether aspirin reduces the risk of heart attack. Researchers randomly assigned a large sample of healthy male physicians (22,071) to one of two groups. One group took a low dose of aspirin (325 mg every other day). The other group took a placebo. Here are the final results.
Heart Attack
No Heart Attack
Totals
Aspirin
139
10,898
11,037
Placebo
239
10,795
11,034
Totals
378
21,693
22,071
Research Question:
Does daily doses of aspirin lower the risk of a heart attack?
(Hit, some of the questions to consider
a) How much lower is the risk of a heart attack for those who took aspirin in the study?
b) What is the relative risk of a heart attack?
c) What is the percent decrease in risk of a heart attack if someone took aspirin daily?)