© 2004 by Oxford University Press
© 2004 Oxford University Press
IN THIS ISSUE |
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Potential Selection Bias in Intervention Studies
Studies that evaluate the effects of proposed interventions to reduce the
risk of disease among carriers of a highly penetrant mutation are important.
In a commentary, Wacholder (p.
1204) argues that some of these studies may be susceptible to a
serious selection bias when they are based in clinics that care for people at
high risk for the disease. He explains how a study design in which a large
fraction of the case patients were diagnosed before being seen at the clinic
and in which all control subjects
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