Statistical methods for accessing agreement between repeated measurements in dental research

Kim,  Ki-Yeol

doi:2016.54.11.880

J Korean Dent Assoc > Volume 54(11); 2016 > Article

The Journal of The Korean Dental Association 2016;54(11):880-896.
DOI: https://doi.org/10.22974/jkda.2016.54.11.005 Published online November 30, 2016.

치의학 연구에서 반복 계측한 자료의 일치도 평가방법

김기열

연세대학교 치과대학 BK²¹ 플러스 통합구강생명과학 사업단, 치의학 교육개발실

Statistical methods for accessing agreement between repeated measurements in dental research

Ki-Yeol Kim

BK21 PLUS Project, Institute for Dental Education, Yonsei University College of Dentistry

Abstract

The comparison of the repeated measurements is often needed to see whether they agree sufficiently, when a measurement is repeated under identical conditions by different raters. Such investigations are often analyzed inappropriately, by using correlation coefficient. The purpose of this study is to introduce statistical methods for accessing the agreement of the repeated measurements, which include Bland-Altman plot, intra class correlation, Passing-Bablok regression and Cohen's kappa coefficient, and to show how to execute them using examples.

Key Words: agreement;repeated measurements;dental research;