The data for the study is shown below: heart attack yes no total 10933 11037 asp

Question

The data for the study is shown below: heart attack yes no total 10933 11037 aspirin 104 10845 11034 placebo 198 21778 22071 293 total do what is the explanatory variable? whether they took aspirin or placebo e) What is the response variable? Heart attack or no heart attack What is the risk of heart attack for those on an aspirin regimen? 0,0094 (in decimal form, rounded to four decimal places) Wh is the risk of heart attack for the placebo group? 0.0179 (in decimal form, rounded to four decimal places) h) Calculate the increased risk in two ways: first as a positive percent value, then as a negative percent value. (In both cases, round to the nearest percent 90% and -47% write a sentence that explains the result of the study using the negative version of increased risk that you found in part (f. Taking an aspirin a day reduces the risk of heartattack by 47% for adult males placebo group) to 2 decimal places. 0.52 (or 1.92)

Explanation / Answer

J.

The odds of developing the heart attack given Aspirin (Exposure) is 104/10933, and of developing the heart attack given Placebo(non -Exposure) is 198/10845.

Hence, Odd Ratio = (104/10933)/(198/10845) = 0.52

H.

Heart attack Yes No Cumulative Incidence Aspirin 104 10933 0.009512485 Placebo 198 10845 0.018257261 Risk Ratio 0.00951/0.01825 = 0.521024754 Negative Percent Value 1-0.521025 0.478975246

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