In a Case-Control Study,a Researcher Found No Association Between Exposure

question 6

Multiple Choice

In a case-control study,a researcher found no association between exposure to A and disease B.Later she found out that there was a misclassification when measuring exposure to A,in both cases and controls.What is a potential explanation for the results (no association) of this case-control study?

• A) Nondifferential misclassification
• B) Differential misclassification
• C) Selection bias
• D) Confounding
• E) Effect-modification

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Definitions:

Dependent Variable

a variable in an experiment or model whose value depends on the effects of other variables, often denoted as the output or outcome variable.

Scatter Plot

A type of data visualization that displays values for two variables for a set of data, showing the relationship between them.

Linear Regression

A statistical method used to model the relationship between a dependent variable and one or more independent variables by fitting a linear equation to observed data.

Positive Skewness

A distribution characteristic where the right tail (higher values) is longer than the left tail, indicating that the mass of the distribution is concentrated on the left.