Odds ratio/Definition

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https://en.citizendium.org/wiki/index.php?title=Odds_ratio/Definition&printable=yes
A definition or brief description of Odds ratio.

The odds ratio is a technical term often used in medical statistics. The odds ratio is the ratio of the relative incidence of a target disorder in the experimental group relative to the relative incidence in a control group. Essentially, it reflects how the risk of having a particular disorder is influenced by the treatment. An odds ratio of 1 means that there is no benefit of treatment compared to the control group.

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