Research article summary (published 30 May 2001):

Drawbacks to integer scoring for ordered categorical data.

Full Abstract

Linear rank tests are widely used when testing for independence against stochastic order in a 2 x J contingency table with two treatments and J ordered outcome levels. For this purpose, numerical scores are assigned, possibly by default, to the J outcome levels. When the choice of scores is not apparent, integer (equally spaced) scores are often assigned. We show that this practice generally leads to unnecessarily conservative tests. The use of slightly perturbed scores will result in a less conservative and uniformly more powerful test.

Author information

Author/s: Ivanova, A (A); Berger, V W (VW);

Affiliation: Department of Biostatistics, The University of North Carolina at Chapel Hill, 27599-7400, USA. aivanova(-atsign-)bios.unc.edu

Journal and publication information

Publication Type: Journal Article

Journal: Biometrics (Biometrics), published in United States. (Language: eng)

Reference: 2001-Jun; vol 57 (issue 2) : pp 567-70

Dates: Created 2001/06/20; Completed 2001/12/04; Revised 2007/08/01;

PMID: 11414585, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

Comments and Corrections

CommentIn: Biometrics. 2007 Mar;63(1):296-8; discussion 298-9. (PMID: 17447957)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Biometry - methods Humans Models, Statistical Probability

Probability Reproducibility of Results Stochastic Processes Survival Analysis

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