StaTips Part III: Assessment of the repeatability and rater agreement for nominal and ordinal data

  • Giuseppe Perinetti University of Trieste, Department of Medical, Surgical and Health Sciences, Italy

Abstract


Assessment of the repeatability and rater agreement for nominal and ordinal data is an important procedure in medical research. This analysis applies to several cases including: i) replicate recordings by the same rater using the same parameter; ii) agreement between/among raters using the same parameter; and iii) agreement between/among different parameters recorded by the same rater. Herein, the most common coefficients of agreement are presented along with criteria for their proper selection.

References

Perinetti G. StaTips Part II: Assessment of the repeatability of measurements for continuous data. South Eur J Orthod Dentofac Res. 2016;3(2):33-34.

Cohen J. A coefficient of agreement for nominal scales. Educ Psychol Meas. 1960;20(1):37-46.

Fleiss JL, Levin B, Paik MC. Statistical methods for rates and proportions, 3rd ed. Wiley. 2003.

Kendall MG, Babington Smith B. The Problem of m Rankings. Ann Math Statist. 1939;10:275-87.

Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics. 1977;33(1):159-74.

Perinetti G. StaTips Part I: Choosing statistical test when dealing with differences. South Eur J Orthod Dentofac Res. 2016;3(1):4-5.

Brenner H, Kliebsch U. Dependence of weighted kappa coefficients on the number of categories. Epidemiology. 1996;7(2):199-202.

Published
2017/10/02
Section
Short Communication