In a cohort study of smoking and myocardial infarction in City A,the number of myocardial infarctions were 250 cases among 7,000 smokers and the number of myocardial infarctions were 150 cases among 20,000 nonsmokers.What is the relative risk of smoking in this cohort study?

A) 0.5
B) 1.7
C) 3.5
D) 4.8
E) 7.5

Relative Risk

A measure that compares the risk of a health event among one group with the risk among another group.

Cohort Study

An observational study where subjects are selected based on exposure status and followed over time to observe outcomes.

Myocardial Infarction

A medical condition commonly known as a heart attack, caused by the interruption of blood flow to a part of the heart.