Explain Understand the hypothetical case-control study as well as misclassification.
Imagine that, in the hypothetical education shown in the table below cases underestimated their exposure and, as a result, 20% of exposed cases were
Falsely classified as unexposed, however that the classification of controls wasn't affected.
True outcomes of a hypothetical case-control study with no measurement Error.
|
|
Cases
|
Controls
|
Total
|
|
Exposed
|
300
|
250
|
550
|
|
Unexposed
|
100
|
150
|
250
|
|
Total
|
400
|
400
|
800
|
Is this kind of misclassification random or systematic? Is it differential or non-differential?
b) What consequence would it have on the results of the study? (In your answer attraction up a two-by-two table showing the misclassification, then compute estimates of the risk ratio for both the true and the misclassified results as well as make comment on their difference to illustrate the effect).