ORs and RRs This assignment will help you analyze the relationship of risk (of a
ID: 3057188 • Letter: O
Question
ORs and RRs
This assignment will help you analyze the relationship of risk (of an illness) to exposure in public health regression analyses. Both ORs and RRs can be used to demonstrate the relationship between exposure and risk. However, each has its own advantages and disadvantages. While ORs are often used in professional papers, they are also often mistaken for RRs. RRs would often be the better choice as they are less complex than ORs and the interpretation is straightforward.
Using the South University Online Library, the Internet, and your text readings, research the following:
ORs
RRs
On the basis of your research, respond to the following:
Identify and state the definition of an OR that you feel is easy to understand.
In your own words, explain what an OR is and for what it is used.
Identify and state the definition of an RR that you feel is easy to understand.
In your own words, explain what an RR is and for what it is used.
Compare and contrast ORs and RRs and how they are used for multisample inferences.
Explain the advantages and disadvantages of using each ratio.
Explanation / Answer
1. The odd ratio is a measure of relative association between an exposure and an outcome. The odd ratio represents the odds that an outcome will occur given a particular exposure compared to the odds of the outcome occurring in the absence of that exposure.
2. The odds ratio(OR) is basically the ratio of the total exposed to risk i.e. the ratio of the odds of those exposed to risk to the odds of those unexposed to risk. Here risk can refer to a particular disease under consideration. It is used for various modelling purposes including design of a cohort, cross sectional studies etc.
3. Relative risk is the ratio of the probability of an event occurring in an exposed group to the probability of an event occurring in comparison to a non exposed group.
4. Relative risk as the definition tells is the simple ratio of two probabilities that gives us a good idea of the percentage of individuals who are relatively exposed to that particular risk. It can be used in place where we need to find the likelihood of an event occurring between two groups.