MEANING
Systematic distortion when loss to follow-up relates to group, exposure, prognosis, or outcome and changes an estimated effect.
Use it for
Use for distortion caused by informative or differential loss to follow-up.Flag a threat to conclusions when participants leave a study unevenly.
Words that belong together
- risk of attrition bias
- assess attrition bias
- loss to follow-up and attrition bias
On the page
Differential dropout from the intervention group raised concern about attrition bias.
Nearby words
Word forms
- Base
- attrition bias
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Usage notes
High overall dropout alone does not prove bias; concern arises when loss is related to outcome or differs in a way that distorts comparison.
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