The following is a 2 by 2 webulator used to compute relative risk
. Enter the data in the cells for the appropriate rows and columns (the green coloured cells), then click on the button
labelled Compute to compute the relative risk .
The relative risk estimate suggests that:
The condition (or outcome) is RR times more likely to occur among those individuals that are exposed to the suspected risk factor (related to) THAN among those individuals with no exposure to the risk factor (unrelated to).
As a rule, the larger the value of the relative risk, that is greater than 1, the stronger the association between the disease or disorder of interest and exposure to the risk factor.
Likewise, values of the relative risk estimate that are close to 1 indicate that the disease and exposure to the risk factor are unrelated (i.e., the risk of occurrence is the same for both exposed and non-exposed individuals).
Similarly values of RR less than 1 indicate a negative association between the risk factor and the disease. A relative risk estimate less than 1 is said to demonstrate a protective effect rather than a detrimental effect.
Click here to return to the Webulator Menu Page
For more information, please contact:
Professor William J. Montelpare, Ph.D.,
Margaret and Wallace McCain Chair in Human Development and Health,
Department of Applied Human Sciences, Faculty of Science,
Health Sciences Building, University of Prince Edward Island,
550 Charlottetown, PE, Canada, C1A 4P3
(o) 902 620 5186
Visiting Professor, School of Healthcare, University of Leeds,
Leeds, UK, LS2 9JT
Copyright © 2002--ongoing [University of Prince Edward Island]. All rights reserved.