To find the absolute risk in a placebo group, follow these steps:

Identify the Outcome of Interest: Determine the specific outcome or event (e.g., disease, side effect) you're measuring within the context of the study.
Gather Data: Collect data on the number of participants in the placebo group and the number of those participants who experienced the outcome of interest.
Calculate Absolute Risk: The absolute risk (AR) in the placebo group is calculated as the proportion of participants who experienced the outcome of interest compared to the total number of participants in the group. The formula to calculate AR is:
Absolute Risk= Number of participants with the outcome / Total number of participants in the placebo group
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Express as a Percentage: Often, absolute risk is expressed as a percentage to make it easier to understand. To convert the AR to a percentage, multiply the result by 100.
For example, if there are 200 participants in a placebo group and 10 of them develop the condition of interest, the absolute risk of developing the condition for a participant in the placebo group would be 10/200 = 0.05 or 5% when expressed as a percentage.

Absolute risk provides valuable information about the baseline risk of experiencing an outcome within a population that has not been exposed to the active treatment or intervention being studied. This information is crucial for understanding the effectiveness and risks associated with medical treatments or interventions.

Problem:

Study that looked at mortality after Dronedarone Therapy for Severe Heart Failure What is the absolute risk of cardiovascular death in placebo group in severe heart failure patients?

A) 0.077
B) 0.082
C) 0.028 *
D) 0.033