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Describe 2 ways that information bias may occur in a case-control study of the relationship between...

Describe 2 ways that information bias may occur in a case-control study of the relationship between binge drinking and academic performance

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Answer #1

1,bias due to confounding:

Due to the knowledge of the who the cases and who are the controls.

2.memory or recall bias: asking about the history or recalling from history can have errors

Taking history, many individuals may forget things and they get manipulated.

3.Selection bias: the cases and control may not be the representatives of cases and control in the general population. There may ve systematic differences in characteristics between cases and control.

A person selected as control can start binge drinking at any point of time,

4.interviewers bias: as the interviewer know the hypothesis and he knows who the cases are and there is a chance the interviewer interviews cases better than control

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