Chapter

Unequal Attrition under Different Types of Follow-Up

Ezra Susser, Sharon Schwartz, Alfredo Morabia and Evelyn J. Bromet

in Psychiatric Epidemiology

Published in print July 2006 | ISBN: 9780195101812
Published online September 2009 | e-ISBN: 9780199864096 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780195101812.003.13

Series: Oxford Psychiatry Series

Unequal Attrition under Different Types of Follow-Up

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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

Chapter.  7969 words. 

Subjects: Public Health and Epidemiology

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