[Intraclass correlation coefficient]

Abstract

The intraclass correlation coefficient makes it possible to measure the general concordance between two or more measurements that involve variables of a quantitative nature, obtained with different measuring instruments or evaluators. It is based on an analysis of variance model with repeated measures. Its use is only possible if there is normality of the distributions of the variables, equality of variances and independence between the errors produced by the observers.

Keywords: Analysis of variance; Análisis de la varianza; Coeficiente de correlación intraclase; Concordance; Concordancia; Intraclass correlation coefficient; Medidas repetidas; Quantitative variables; Repeated measures; Variables cuantitativas.