10) State which method to control for confounding is being used in the following
ID: 3456746 • Letter: 1
Question
10) State which method to control for confounding is being used in the following scenarios. In each scenario, exercise is the exposure, myocardial infarction is the disease, and gender is the confounder.
a. A study of exercise and myocardial infarction that includes men and women. Controls are selected so that the proportions of male and female subjects groups are identical.
b. A study of exercise and myocardial infarction that includes men and women. The study determines the relative risk separately for men and women and compares these to the crude relative risk.
Explanation / Answer
A. In this case, the method of control for confounding being used is matching. Matching which involves selection of a comparison group with respect to the distribution of one or more potential confounders.
B. In this case, the method of control for confounding being used is standardisation. Standardisation is used to compare crude rates objectively across different populations.
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