Epidemiologists Tried to Investigate the Role of Factor Y in the Exposure-Disease

Multiple Choice

Epidemiologists tried to investigate the role of factor Y in the exposure-disease relationship.They developed three tables to show the exposure-disease relationship based on the status of factor Y.Based on the information given,what is the role of factor Y in the exposure-disease relationship? Overall
$\begin{array}{|l|l|l} & \text { Case } & \text { Control } \\\hline \text { Exposed } & 1,000 & 500 \\\hline \text { Unexposed } & 200 & 500\end{array}$
Factor Y present
$\begin{array}{|l|l|l} & \text { Case } & \text { Control } \\\hline \text { Exposed } & 800 & 250 \\\hline \text { Unexposed } & 100 & 250\end{array}$
Factor Y absent
$\begin{array}{|l|l|l} & \text { Case } & \text { Control } \\\hline \text { Exposed } & 200 & 250 \\\hline \text { Unexposed } & 100 & 250\end{array}$

A) Factor Y is a confounder.
B) Factor Y is an effect measure modifier.
C) Factor Y is a mediator.
D) Factor Y is an outcome.
E) Factor Y does not have any role in the exposure-disease relationship.