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Sample sizes for estimation of the odds ratio in unmatched case-control studies

Sample sizes for estimation of the odds ratio in unmatched case-control studies

American Journal of Epidemiology 120(1): 145-153

ISSN/ISBN: 0002-9262

PMID: 6741915

DOI: 10.1093/oxfordjournals.aje.a113863

A method is presented to obtain sample sizes for cases and controls that are required to provide approximate confidence intervals on the log odds ratio of predetermined width 2d and probability of coverage as a function of assumed exposure rates in the control group, assumed odds ratio psi, required d, and ratio C:1 of controls to cases.

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Accession: 044268327

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