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What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator...

What does a relative risk (RR) represent (The fraction in the slides-which group is the numerator and which group is the denominator). Remember a RR or OR(odds ratio) compares the risk of disease in those exposed to the risk of disease in those unexposed.

What does it generally mean when you have a RR=1, RR<1or a RR>1

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Ans: Relative risk (RR) is the probability that a member of an exposed group will develop a disease relative to the same that a member of an unexposed group develops the same disease.

RR = P diseaseerposed) P(disease unexposed)

RR =1 ,means, the chances for disease for those who exposed ,unlikely to exist.

RR<1 , means ,risk is less for exposed members.

RR>1, means, risk is more for exposed members.

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