Enter the absolute risk of the treatment group and the absolute risk of the control group into the Calculator. The calculator will evaluate the Absolute Risk Increase. 

Absolute Risk Increase Formula

ARI = ART - ARC

Variables:

  • ARI is the Absolute Risk Increase ()
  • ART is the absolute risk of the treatment group
  • ARC is the absolute risk of the control group

To calculate Absolute Risk Increase, subtract the absolute risk of the control group from the absolute risk of the treatment group.

How to Calculate Absolute Risk Increase?

The following steps outline how to calculate the Absolute Risk Increase.

  1. First, determine the absolute risk of the treatment group. 
  2. Next, determine the absolute risk of the control group. 
  3. Next, gather the formula from above = ARI = ART – ARC.
  4. Finally, calculate the Absolute Risk Increase.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

absolute risk of the treatment group = 75

asbolute risk of the control group = 40