The Physicians\' Health Study randomly assigned 22,071 healthy male physicians a

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The Physicians' Health Study randomly assigned 22,071 healthy male physicians at least 40 years old to take either an aspirin every other day or a placebo pill every other day. Of the 10873 physicians who took aspirin regularly for 5 years, 8 had a fatal heart attack and 119 had a nonfatal heart attack. Of the 11198 who took the placebo, 26 suffered a fatal heart attack and 222 had a nonfatal heart attack. Please use 4 decimal places to answer the questions below. (a) What is the proportion of physicians who suffered a fatal heart attack in the: aspirin group? placebo group Enter a number (b) Calculate the relative risk of a fatal heart attack for physicians taking aspirin compared with those taking a placebo (do not use the rounded values from part (a) to do your calculations Use the original proportions in your calculation. Remember, give your answer to 4 decimal places). (c) What is the proportion of physicians who suffered a nonfatal heart attack in the: aspirin group? placebo group? (d) Calculate the relative risk of a nonfatal heart attack, for physicians taking aspirin compared with those taking a placebo (do not use rounded values in your calculation and give your answer to 4 decimal places) Submit Answer Save Progress

Explanation / Answer

physician health study randomly assigned 22071 healthy male physician atleast 40 years old either aspirin every day or placebo pill every day
of the 10873 physician who took aspirin regularly for 5 years , 8 has fatal heart attack and 119 had non fatal heart attack.
of the 11198 who took placebo ,26 suffered fatal heart attack and 222 had non fatal heart attack.
a.
proportion of fatal heart attack in the group:
aspirin = 8/10873 = 0.0007
placebo = 26/11198 = 0.0023

b.
relative risk of fatal heart attack for physician taking aspirin compared with placebo
= (0.0007-0.0023)/0.0007
= -2.2857

c.
proportion of non fatal heart attack in the group:
aspirin = 119/10873 = 0.0109
placebo = 222/11198 = 0.0198
d.
relative risk of non fatal heart attack for physician taking aspirin compared with placebo
= (0.0109-0.0198)/0.0109
= -0.8165

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