Evidence-Based Practice / Unit 22 EBP 3169 short lesson, about 20 seconds
Case-Control, Looking Back
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The idea
A case-control study compares people who have a condition with people who do not, to find predictor variables associated with having it. It is usually retrospective.
In practice
People with a condition and controls, compared on prior exposures.
Where people slip
Looking back means the exposure data already exist and were not collected for this purpose. Unit 06's recall bias warning applies to the designer too.
Your place on the trail
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Unlocks
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