mjl1717
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What the difference between relative risk and odds ratio?
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| kmp
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Odds ratio used for case-control (retrospective )studies and relative risk used for cohort studies.
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| mjl1717
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Sorry-What I really mean is what is odds ratio and relative risk?
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| AngChop
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The relative risk just asks "how much more likely?" it's the incidence rate of exposed group divided by the incidence rate of the unexposed group. Basically..u wanna know in the cohort study "How much greater the chance one group will have of contracting the disearse compared with the other group". Eg: Incidence of infant mortality in one ethnic group compared with incidence of infant mortality in another ethnic group. The odds ratio on the other hand (used in a case-control study) asks "what are the odds of getting a disease disease with exposure to a risk factor Vs nonexposure to that risk factor"..eg. odds of a person with lung cancer was a smoker Vs odds that a person without lung cancer was a smoker...it's quite useful in unusual diseases too
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| mjl1717
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Thx for the clarification and detail.
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| AngChop
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no prob 
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