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Viva Calculator

Relative Risk Calculator – RR Epidemiology

Calculate relative risk for epidemiological analysis

Calculate Relative Risk

Exposed Group

Unexposed Group

Table of Contents

How to Use

  1. Enter number of cases in exposed group
  2. Enter total number in exposed group
  3. Enter number of cases in unexposed group
  4. Enter total number in unexposed group
  5. View relative risk and interpretation

What is Relative Risk?

Relative risk (RR) is a measure used in epidemiology to compare the risk of an outcome between two groups - those exposed to a factor and those not exposed. RR = (Risk in exposed) / (Risk in unexposed). An RR > 1 indicates increased risk, RR = 1 indicates no association, and RR < 1 indicates decreased risk (protective effect).

Frequently Asked Questions

How do you interpret relative risk?
RR > 1 means exposure increases risk. RR = 1 means no association. RR < 1 means exposure decreases risk (protective). For example, RR = 2.0 means exposed group has twice the risk of the unexposed group.

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