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Questions and Answers
What is absolute risk reduction (ARR)?
What is absolute risk reduction (ARR)?
ARR is the absolute risk of events in the control group (ARC) minus the absolute risk of events in the exposed or treatment group (ART): ARR = ARC–ART.
How does the absolute risk reduction (ARR) vary?
How does the absolute risk reduction (ARR) vary?
The ARR varies with the underlying risk of an event; e.g., it becomes smaller when event rates are low.
What is another name for the absolute risk reduction (ARR)?
What is another name for the absolute risk reduction (ARR)?
The ARR is also known as the risk difference.
