Relative Risk Calculator

Enter the total amount of people with a disease and without of two separate groups; one being the exposed group and one being the control. The calculator will determine the relative risk.

Relative Risk Formula

The following equation can be used to calculate the relative risk of two groups of people.

R = [ a / (a+b)] / [c/(c+d))]

  • Where R is the relative risk
  • a is the number of people in the exposed group with a disease
  • b is the number of people in the exposed group without the disease
  • c is the number of people in the control or base group with the disease
  • d is the number of people ins the control group without the disease

What is relative risk?

Relative risk is measure the the risk ratio of one group to another. In other words, it compares how many people get a particular disease when exposed with a outside factor with respect to a control group not exposed to that factor.

relative risk calculator

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