Odds ratio - Wikipedia, the free encyclopedia
The odds ratio is a measure of effect size, describing the strength of association or non-independence between two binary data values. It is used as a descriptive statistic, and plays an important r...
en.wikipedia.org/wiki/Odds_ratio
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Both the odds ratio and the relative risk compare the likelihood of an event between two groups. Consider the following data on survival of passengers on the Titanic. There were 462 female passengers: 308 survived and 154 died.
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www.childrens-mercy.org/stats/journal/oddsratio.asp
www.childrens-mercy.org/stats/journal/oddsratio.asp
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An odds ratio of 1 implies that the event is equally likely in both groups. An odds ratio greater than one implies that the event is more likely in the first group. An odds ratio less than one implies that the event is less likely in the first group.
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www.childrensmercy.org/stats/definitions/or.htm
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The odds ratio is a relative measure of risk, telling us how much more likely it is that someone who is exposed to the factor under study will develop the outcome as compared to someone who is not exposed. ... An odds ratio is calculated by dividing the odds in group 1 by the odds in group 2. For example, the odds ratio...
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www.blackwellpublishing.com/specialarticles/jcn_10_268....
www.blackwellpublishing.com/specialarticles/jcn_10_268.pdf
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Calculating the odds-ratio for a set of data is fairly striaght-forward, you need to construct a contingency table in the same manner as you do for χ2 calculations, although in this instance you should always have the cases in the frst row and the risk factor in the first column.
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slack.ser.man.ac.uk/theory/association_odds.html
slack.ser.man.ac.uk/theory/association_odds.html
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The Two by Two help page has moved to this location. ... Two by two tables ... Simple Interactive Statistical Analysis...
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home.clara.net/sisa/two2hlp.htm
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We understand the definiton of the odds ratio, and how it is one way of parameterising association: ORs plus margins give you the whole table. ... The odds ratio for whites versus blacks getting versus not getting the death penalty is (53/414)/(11/37) = 0.43. That is, the odds of a white person convicted of killing a...
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teaching.sociology.ul.ie/SSS/lugano/node40.html
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Monthly independent journal about evidence-based healthcare, written by Oxford scientists for healthcare professionals and consumers. Current and archived articles can be downloaded. ... Please adjust your browser's bookmarks accordingly. ... Picture of the Bandolier Logo...
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www.jr2.ox.ac.uk/bandolier/
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Definition and other additional information on Odds ratio from Biology-Online.org dictionary. ... This measure should be used for case control studies where we retrospectively look at risks in those with and without disease. Also known as exposure odds ratio.
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www.biology-online.org/dictionary/Odds_ratio
www.biology-online.org/dictionary/Odds_ratio
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