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By: joeyfennema • 7 year ago
By: xxjorienxx • 7 year ago
assumes here to find all the formulas, however, is not really the case
By: carronmarilynhanekom • 7 year ago
Some examples from this set of practice questions
1.
Typically, the odds ratio approximates the relative risk when?
Answer: The incidence of disease is low
2.
Which epidemiologic study design is best for studying a rare disease and a common exposure?
Answer: Case-control study
3.
In epidemiologic studies non-differential misclassification (random measurement error) in the measurement of the exposure generally?
Answer: Biases the true effect toward the null value
4.
A particular study is using a new machine counting lymphocytes (a type of cells in the immune system). However the machine is not being used correctly, and as a result counts the number of lymphocytes present in a sample incorrectly. However, the degree of error is unpredictable; sometimes it overcounts, sometimes it undercounts, and sometimes it counts correctly. What can we say about the reliability and validity of this study measure?
Answer: The measure is valid ON AVERAGE but not reliable & The measure is not valid and not reliable
5.
Which best described the impact that a true confounding variable can have on study results?
Answer: A confounder may increase or decrease the observed measure of association, depending on the specific circumstances.
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