Avoiding bias due to perfect prediction in multiple imputation of incomplete categorical variables

White, Ian R., Daniel, Rhian ORCID: https://orcid.org/0000-0001-5649-9320 and Royston, Patrick 2010. Avoiding bias due to perfect prediction in multiple imputation of incomplete categorical variables. Computational Statistics & Data Analysis 54 (10) , pp. 2267-2275. 10.1016/j.csda.2010.04.005

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Abstract

Multiple imputation is a popular way to handle missing data. Automated procedures are widely available in standard software. However, such automated procedures may hide many assumptions and possible difficulties from the view of the data analyst. Imputation procedures such as monotone imputation and imputation by chained equations often involve the fitting of a regression model for a categorical outcome. If perfect prediction occurs in such a model, then automated procedures may give severely biased results. This is a problem in some standard software, but it may be avoided by bootstrap methods, penalised regression methods, or a new augmentation procedure.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine
Subjects:	R Medicine > R Medicine (General)
Uncontrolled Keywords:	Missing data; Multiple imputation; Perfect prediction; Separation
Publisher:	Elsevier
ISSN:	0167-9473
Last Modified:	03 Nov 2022 09:48
URI:	https://orca.cardiff.ac.uk/id/eprint/106049

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