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Psychiatric EpidemiologySearching for the Causes of Mental Disorders$
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Ezra Susser, Sharon Schwartz, Alfredo Morabia, and Evelyn Bromet

Print publication date: 2006

Print ISBN-13: 9780195101812

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780195101812.001.0001

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Unequal Attrition under Different Types of Follow-Up

Unequal Attrition under Different Types of Follow-Up

(p.151) 13 Unequal Attrition under Different Types of Follow-Up
Psychiatric Epidemiology

Ezra Susser (Contributor Webpage)

Sharon Schwartz

Alfredo Morabia

Evelyn J. Bromet

Oxford University Press

This chapter provides a framework for the prevention and control of bias due to unequal attrition in cohort studies. Like the effects of third-variable confounding, the effects of unequal attrition can be limited by the design, as well as the analysis, of a cohort study. The most problematic kind of attrition is differential. This kind of attrition causes a bias that may not be remediable. The chapter uses sensitivity analysis to gauge the potential bias.

Keywords:   cohort studies, cohort attrition, bias, exposure, disease, data analysis, sensitivity analysis

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