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Risk, Chance, and CausationInvestigating the Origins and Treatment of Disease$
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Michael B. Bracken

Print publication date: 2013

Print ISBN-13: 9780300188844

Published to Yale Scholarship Online: October 2013

DOI: 10.12987/yale/9780300188844.001.0001

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Screening, Diagnosis, and Prognosis

Screening, Diagnosis, and Prognosis

(p.113) Seven Screening, Diagnosis, and Prognosis
Risk, Chance, and Causation

Michael B. Bracken

Yale University Press

This chapter discusses the common dilemmas in the medical and public health sector. First, it must be established that no test for screening, diagnosis, or prognosis is 100 percent accurate. It is possible for these tests to produce some positive test results in people who do not have the disease, referred to as a “false positive,” and some negative test results in those who do, referred to as a “false negative.” Screening is conducted in populations of presumptively healthy individuals to detect early signs and symptoms of disease that might otherwise be missed. Diagnostic studies, on the other hand, are conducted where there is a suspicion of disease, either from screening or more commonly from patients themselves becoming aware of symptoms.

Keywords:   screening, diagnosis, prognosis, false positive, false negative, diagnostic studies

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