Encyclopedia of Public Health

2008 Edition
| Editors: Wilhelm Kirch

Relative Odds

Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-5614-7_2975


Odds ratio (OR); Cross-product ratio


The odds ratio is a measure of association, in which a value of “1.0” means that there is no relationship between variables. The value of an odds ratio can be less than or greater than 1.0. The magnitude of any relationship is measured by the difference (in either direction) from 1.0. An odds ratio less than 1.0 indicates an inverse or negative association. An odds ratio greater than 1.0 indicates a positive correlation.


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© Springer-Verlag 2008