Inverse sampling of controls in a matched case control study.


Keogh, RH; (2008) Inverse sampling of controls in a matched case control study. Biostatistics (Oxford, England), 9 (1). pp. 152-8. ISSN 1465-4644 DOI: https://doi.org/10.1093/biostatistics/kxm019

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Abstract

: A method of inverse sampling of controls in a matched case-control study is described in which, for each case, controls are sampled until a discordant set is achieved. For a binary exposure, inverse sampling is used to determine the number of controls for each case. When most individuals in a population have the same exposure, standard case-control sampling may result in many case-control sets being concordant with respect to exposure and thus uninformative in the conditional logistic analysis. The method using inverse control sampling is proposed as a solution to this problem in situations when it is practically feasible. In many circumstances, inverse control sampling is found to offer improved statistical efficiency relative to a comparable study with a fixed number of controls per case.

Item Type: Article
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Medical Statistics
PubMed ID: 17573362
Web of Science ID: 251679400011
URI: http://researchonline.lshtm.ac.uk/id/eprint/176021

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