A Note on the Use of the Intraclass Correlation Coefficient in the Evaluation of Agreement Between Two Methods of Measurement

Overview

Journal Comput Biol Med

Publisher Elsevier

Specialties Biology
General Medicine
Medical Informatics

Date 1990 Jan 1

PMID 2257734

Citations 184

Authors

J M Bland

D G Altman

Affiliations

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Abstract

The intraclass correlation coefficient (rI) has been advocated as a statistic for assessing agreement or consistency between two methods of measurement, in conjunction with a significance test of the difference between means obtained by the two methods. We show that neither technique is appropriate for assessing the interchangeability of measurement methods. We describe an alternative approach based on estimation of the mean and standard deviation of differences between measurements by the two methods.

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