odds ratio

listen to the pronunciation of odds ratio
English - Turkish
(İstatistik) Olasılık Oranı (OO)
(Kimya) eşitsizlik oranı
English - English
The odds ratio is a measure of effect size particularly important in Bayesian statistics and logistic regression
The odds ratio is a measure of effect size particularly important in Bayesian statistics and logistic regression. It is defined as the ratio of the odds of an event occurring in one group to the odds of it occurring in another group, or to a sample-based estimate of that ratio
The odds of an event, understood best by those who enjoy wagers, is the number of times it occurred (a) divided by the number of times it didn’t (b), or a/b This contrasts with the probability of an event which is the number of times it occurred divided by the number of times it could have occurred, or a/a+b The odds ratio is the ratio of the odds of an event in one group divided by the odds in another group When the event rate or absolute risk in the control group is small (less than 20% or so), then the odds ratio is very close to the relative risk
The ratio of two odds
A relative measure of the difference in exposure between the diseased (cases) and not diseased (controls) individuals in a case-control study The OR is interpreted similarly to the relative risk
describes the odds of an experimental patient suffering an adverse event relative to a control patient See also section on Odds Ratios
Ratio of the odds of disease among the exposed compared with the odds of disease among the unexposed For rare diseases, including some cancers, the odds ratio is an estimate of the relative risk
is the odds for the disease in the risk group divided by the odds for the disease in the non-risk group, or the odds for the risk factor in the disease group divided by the odds for the risk factor in the non-disease group, or the risk ratio for the disease divided by the risk ratio for not having the disease
describes the odds of an experimental patient suffering an adverse event relative to a control patient
The comparison between the odds of exposure among cases to the odds of exposure among controls The odds ratio is often used as an approximation of relative risk
One measure of treatment effectiveness It is the probability of an event happening rather than not happening If the OR is equally to one, then the effects of the treatment are no different from those of the control treatment If the OR is greater (or less) than one, then the effects of the treatment are more (or less) than those of the control treatment Note that the effects being measured may be adverse (e g death or disability) or desirable (e g survival)
The ratio of two odds Usually the ratio of the odds in favour of exposure (to eg therapy involving the proposed drug) among the cases of the disease or outcome(s) of interest to the odds in favour of exposure among those without the disease or outcome of interest In a "rare" disease, the odds ratio is an approximation of the relative risk
the change in odds of membership in the target group for a one-unit increas in the predictor
is used in case control trials
(Syn: cross-product ratio, relative odds): a measure of the degree of association; for example, the odds of exposure among the cases compared with the odds of exposure among the controls
(Cochrane definition) The ratio of the odds of an event in the experimental (intervention) group to the odds of an event in the control group Odds are the ratio of the number of people in a group with an event to the number without an event Thus, if a group of 100 people had an event rate of 0 20, the event happened to 20 people and did not happen to 80, and the odds would be 20/80 or 0 25 An odds ratio of one indicates no difference between comparison groups For undesirable outcomes an odd ratio of less that one indicates that the intervention was effective in reducing the risk of that outcome When the event rate is small, odds ratios are very similar to relative risks
a statistical measure of the likelihood of developing a disease or condition if exposed to a certain factor or pathogen
The ratio of the odds of having the target disorder in the experimental group relative to the odds in favour of having the target disorder in the control group (in cohort studies or systematic reviews), or the odds in favour of being exposed in subjects with the target disorder divided by the odds in favour of being exposed in control subjects (without the target disorder)
Quantitative measure reported in case-control studies that describes the increase (or decrease) in risk associated with a specific risk factor An odds ratio is interpreted in the same way as a relative risk, though it is calculated differently
or
odds ratio

    Hyphenation

    odds ra·tio

    Turkish pronunciation

    ädz reyşiō

    Pronunciation

    /ˈädz ˈrāsʜēˌō/ /ˈɑːdz ˈreɪʃiːˌoʊ/
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