Many persons developed hives during the springtime. Some cases are due to exposu

Question

Many persons developed hives during the springtime. Some cases are due to exposure to ragweed, some to oak pollen, some to poison ivy and others to eating certain foods. In this case the most appropriate analysis to determine the risk of developing hives from strawberries is 1. Odds Ratio 2. Relative Risk 3. Phi Coefficient 4. All of the preceding 5. Both 1, 2. G During the Fujihoma Atomic Rector meltdown thousands were exposed to radiation during the weeks following the incidence. Some of those exposed may develop cancer in the future and some will not. In theory, the best estimate of the risk of cancer in this population at some future date 1. Odds Ratio 2. Relative risk 3. Case/Control experiment 4. All of the preceding 5. Both 2,3.

Explanation / Answer

The relative risk (RR) and the odds ratio (OR) are the two most widely used measures of association in epidemiology. The direct computation of relative risks is feasible if meaningful prevalences or incidences are available
If meaningful prevalences or incidences are not available, the OR provides a valid effect measure: It describes the ratio of disease odds given exposure status, or alternatively the ratio of exposure odds given the disease status.

The chances of something happening can be expressed as a risk or as an odds:

The relative risk is a ratio of two risks.

So , answer to first part is (2).relative risk

In the second question, answer would be (1) --> odds ratio.

ODDS= (the chances of something happening ) / (the chances of it not happening)

Odds are ratio of two probabilities

i.e. Probability that event occurs / 1-Probability that event does not occur

Odds refer to single entity

If an event has the probability P, then the odds of the same event are P/1-P

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