A Fast Computational Formula for Kappa Coefficient
Science Journal of Clinical Medicine
Volume 4, Issue 1, January 2015, Pages: 1-3
Received: Dec. 26, 2013; Accepted: Sep. 15, 2014; Published: Jan. 12, 2015
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Authors
Loc Nguyen, Sunflower Soft Company, Ho Chi Minh City, Vietnam
Hang Ho, Vinh Long General Hospital, Vinh Long Province, Vietnam
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Abstract
Kappa coefficient is very important in clinical research when there is a requirement of inter-agreement among physicians who measure clinical data. It is too complicated to calculate traditional Kappa formula in huge data because of many arithmetic operations for determining probability of observed agreement and probability of chance agreement. Therefore, this research proposes a fast computational formula for Kappa coefficient based on comments about probability of observed agreement and probability of chance agreement. These comments lead to the method to save time cost when calculating Kappa coefficient and to reduce the number of arithmetic operations at least. Finally, such fast formula is applied into the gestational data measured in real world so as to evaluate its strong point.
Keywords
Kappa Coefficient, Fast Computational Formula
To cite this article
Loc Nguyen, Hang Ho, A Fast Computational Formula for Kappa Coefficient, Science Journal of Clinical Medicine. Vol. 4, No. 1, 2015, pp. 1-3. doi: 10.11648/j.sjcm.20150401.11
References
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Gwet, K. (2002) Kappa Statistic is not Satisfactory for Assessing the Extent of Agreement Between Raters. Statistical Methods For Inter-Rater Reliability Assessment, No. 1, April 2002.
[2]
Ho, H., Phan, D. (2011). Estimation of fetal weight from 37 to 42 weeks based on 2-dimensional ultrasound measures. Journal of Practical Medicine, volume 12 (797) 2011, pp. 8– 9.
[3]
Wikipedia. (2014) Cohen’s kappa. URL (last checked September 13 2014) is http://en.wikipedia.org/wiki/Cohen%27s_kappa.
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