Epidemiologic case-control studies often report increased risk of an event given exposure, but we know that...

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Statistics

Epidemiologic case-control studies often report increased riskof an event given exposure, but we know that we can only calculatethe odds ratio in a case-control study as opposed to a riskratio.

Is it important to distinguish between a risk ratio and an oddsratio?

When does Odds Ratio approximate the Risk Ratio?

When does it approximate the Rate Ratio?

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ANSWER When two groups are under study or observation then we can choose above ratio which are considered as 1 Odds Ratio It is defined as the ratio of the odds of an event occurring in one group to the odds of it occurring in another    See Answer
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