Relative risk (RR) is a measure used in epidemiology to compare the risk of a certain event (such as developing a disease) occurring in one group with the risk of it occurring in another group. It is calculated by dividing the risk (probability) of the event in the exposed group by the risk of the event in the unexposed (or control) group.

The formula for relative risk is:

Relative Risk (RR) = Risk in Exposed Group / Risk in Unexposed Group

Where:

The Risk in Exposed Group is calculated as the number of individuals experiencing the event in the exposed group divided by the total number of individuals in the exposed group.

The Risk in Unexposed Group is calculated as the number of individuals experiencing the event in the unexposed group divided by the total number of individuals in the unexposed group.

If you have specific data (such as the number of individuals in each group and the number of events in each group), I can help calculate the relative risk for you. Please provide the data if you need a specific calculation.

Problem:

Study looked at mortality after Dronedarone Therapy for Severe Heart Failure What is the relative risk increase using Dronedarone compared to placebo in severe heart failure patients?

А) 170% *
B) 30%
C) 6.9%
D) 4.9%