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A term of art for a subject in a clinical trial who for any reason fails to continue in the trial until the last visit or observation, as required of him or her by the study protocol.
dropoutAdolescent medicine A person, often a high school student, who abandons his/her education before graduating Clinical trials A person admitted to a clinical–phase III–trial for efficacy of a therapeutic agent or procedure, who abandons the role of 'guinea pig'
1. An individual who matriculates in, but does not complete a course of study sponsored by an academic institution.
2. One who, after enrollment, chooses not to participate in a research investigation. In health care jargon, those who stop participating in a study and do not maintain contact with the investigators are said to be “lost to follow-up.”
a patient which becomes inaccessible or ineligible to follow-up procedures.