Loss to Follow-up

Definition

Health Economics

  • A common cause of missing data, especially in long-term studies, loss to follow-up occurs when researchers lose contact with participants in a trial for such reasons as migration or failure to maintain contact prior to the termination of a study or of planned endpoints. Planned data collection is incomplete as a result.
http://www.dictionarycentral.com/definition/loss-to-follow-up.html