The Women's Health Study included 39,876 female health professionals aged 45 years and older who were followed for an average of 10 years (Ridker et al., 2005). At the beginning of the study, participants were randomly assigned to take either a daily low-dose aspirin or a daily placebo pill for the duration of the study. At the end of the study, researchers measured the number of participants that suffered from a heart attack during the study. Data are summarized in the following table.
-Calculate the relative risk of heart attack for the low-dose aspirin group compared to the placebo group.

Question

The Women's Health Study included 39,876 female health professionals aged 45 years and older who were followed for an average of 10 years (Ridker et al., 2005). At the beginning of the study, participants were randomly assigned to take either a daily low-dose aspirin or a daily placebo pill for the duration of the study. At the end of the study, researchers measured the number of participants that suffered from a heart attack during the study. Data are summarized in the following table. 
-Calculate the relative risk of heart attack for the low-dose aspirin group compared to the placebo group.

Quizplus · Accepted Answer

The relative risk of heart attack for the low-dose aspirin group compared to the placebo group is 1.026, which means that the low-dose aspirin group had a 2.6% higher risk of heart attack than the placebo group.

The Women's Health Study Included 39,876 Female Health Professionals Aged