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When odds ratio equal relative risk?
RELATIONSHIP OF RISK RATIO AND ODDS RATIO When there is no association between exposure and outcome, both OR and RR are identical and equal to 1.0 [Table 3a].
Under which conditions are the values for the relative risk and odds ratio the most similar?
If there's absolutely no difference between the groups in the probability of an outcome, then both the OR and the RR are 1.0. That's the only situation in which they can be exactly equal.
Are rate ratio and relative risk the same?
Risk ratio: ratio of the risk of an event in one group (exposure or intervention) to that in another group (control). So it depends on your definitions of rate and risk. The term "relative risk" is sometimes used as a synonym for risk ratio, and rate ratio is one of the relative risk measures too.
Why is odds ratio used in case control studies instead of relative risk?
In these case-control studies, the odds ratio provides a valid estimate of the risk ratio without assuming that the disease is rare in the source population.
What is an example of odds ratio and relative risk?
Despite the fact that the relative risk and odds ratio have the same range, they represent totally different measures of differential risks and, therefore, have quite different interpretations. For example, if p1=0.40 and p2=0.25, then the relative risk is r=1.60, but the odds ratio is θ =2.00.