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Nov 3, 2020 · An odds ratio (OR) is a measure of association between an exposure and an outcome. The OR represents the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring in the absence of that exposure.
- What Are The Odds?
- Probability and Odds
- Odds Ratio
- Interpreting Odds Ratios
- Conclusion
- Conflict of Interest
- Acknowledgments
- Author Disclaimer
Imagine it is the middle of winter and you and your friends are camping by a lake. You turn to your friend and ask, “What are the odds you jump in the lake?” Immediately your friend protests and says, “Zero!” You understand this to mean that there is no way your friend will be jumping in the freezing lake—but have you ever considered what “odds” re...
To understand the odds ratio, we first need to understand probability and odds. ProbabilityThe proportion of times an even is expected to occur in the long run, which are always a number between 0 and 1.refers to the likelihood that an event will occur. Probability is a number between 0 and 1, where 1 is a 100% chance that the event will occur. Let...
When working with odds ratiosA measure of association which measures the odds of an event happening in one group compared to the odds of the same event happening in another group., researchers are interested in the relationship an exposureAny factor, condition, or characteristic that may be associated with an outcome of interest. and an outcomeThe ...
There are three main interpretations for an odds ratio: no association, protective factor, and risk factor. If an odds ratio is equal to 1, this means that there is no association between the exposure and the odds of disease . This is because, for an odds ratio to be equal to 1, the odds of disease given exposure and the odds of disease given no ex...
Researchers use odds ratios in many aspects of research. From the testing of new medical techniques, to vaccination trials testing the effectiveness of vaccines, to examining the impact of environmental factors like pollution or UV rays, odds ratios can help researchers understand how exposures effect the odds of disease. Naturally, odds ratios are...
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
This material was based upon work supported by the National Science Foundation under Grant No. 2046122. We would like to thank the members of the Ryu Computational Lab Group for their review and contribution to this article, including Riley Brenner, Kurtis Bertauche, Alexander Choi, and Korben DiArchangel.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.
Odds ratios are used to compare the relative odds of the occur-rence of the outcome of interest (e.g. disease or disorder), given exposure to the variable of interest (e.g. health characteristic, aspect of medical history).
Aug 1, 2010 · What is an odds ratio? An odds ratio (OR) is a measure of association between an exposure and an outcome. The OR represents the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring in the absence of that exposure.
May 22, 2023 · The odds ratio (OR) is a measure of how strongly an event is associated with exposure. The odds ratio is a ratio of two sets of odds: the odds of the event occurring in an exposed group versus the odds of the event occurring in a non-exposed group.
- Steven Tenny, Mary R. Hoffman
- 2023/05/22
- University of Nebraska Medical Center
Aug 13, 2013 · How to interpret odds ratios, confidence intervals and p values with a stepwise progressive approach and a’concept check’ question as each new element is introduced.
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Explaining odds ratios. J Can Acad Child Adolesc Psychiatry. 2010 Aug;19 (3):227-9. Author. Magdalena Szumilas 1. Affiliation. 1 Research Associate, Sun Life Financial Chair in Adolescent Mental Health, IWK Health Centre & Dalhousie University, Maritime Outpatient Psychiatry, Halifax, Nova Scotia. PMID: 20842279. PMCID: PMC2938757.
