Odds Ratio


Note that the odds ratio is symmetric in the two events, and there is no causal direction implied ( correlation does not imply causation ): a positive OR does not establish that B causes A, nor that A causes B. However, often the odds ratio is used asymmetrically to infer causality by comparing the occurrence of some outcome (A) in the presence of some exposure (B), with the occurrence of the outcome (A) in the absence of a particular exposure (absence of B). [1]

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The odds ratio OR is a statistic defined as the ratio of the odds of A in the presence of B and the odds of A without the presence of B This statistic attempts to quantify the strength of the association between A and B

The 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

An odds ratio O...

An odds ratio of exactly 1 means that exposure to property A does not affect the odds of property B An odds ratio of more than 1 means that there is a higher odds of property B happening with exposure to property A

An odds ratio o...

Odds ratio The odds ratio is a good approximation of the risk ratio when the disease is rare and when the controls are representative of the general population in terms of the exposure

Odds ratio The ...

MedCalcs free online Odds Ratio OR statistical calculator calculates Odds Ratio with 95 Confidence Interval from a 2x2 table  Odds ratios should be avoided when events are common letter BMJ 19983171318 Deeks JJ Higgins JPT 2010 Statistical algorithms in Review Manager 5

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Adjusted Odds Ratio  is the crude odds ratio produced by a regression model which has been modified adjusted to take into account other data in the model that could be for instance a prognostic baseline variable

Adjusted Odds R...

The odds ratio is the most popular measure of differential risk in such studies because unlike relative risk and risk difference it can be estimated from both prospective and retrospective studies

The odds ratio ...

The odds is the ratio of the probability that the event of interest occurs to the probability that it does not This is often estimated by the ratio of the number of times that the event of interest occurs to the number of times that it does not

The odds is the...

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

An odds ratio O...