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A Fast Computational Formula for Kappa Coefficient

Received: 26 December 2013     Accepted: 15 September 2014     Published: 12 January 2015
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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.

Published in Science Journal of Clinical Medicine (Volume 4, Issue 1)
DOI 10.11648/j.sjcm.20150401.11
Page(s) 1-3
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

Kappa Coefficient, Fast Computational Formula

References
[1] 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.
Cite This Article
  • APA Style

    Loc Nguyen, Hang Ho. (2015). A Fast Computational Formula for Kappa Coefficient. Science Journal of Clinical Medicine, 4(1), 1-3. https://doi.org/10.11648/j.sjcm.20150401.11

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    ACS Style

    Loc Nguyen; Hang Ho. A Fast Computational Formula for Kappa Coefficient. Sci. J. Clin. Med. 2015, 4(1), 1-3. doi: 10.11648/j.sjcm.20150401.11

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    AMA Style

    Loc Nguyen, Hang Ho. A Fast Computational Formula for Kappa Coefficient. Sci J Clin Med. 2015;4(1):1-3. doi: 10.11648/j.sjcm.20150401.11

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  • @article{10.11648/j.sjcm.20150401.11,
      author = {Loc Nguyen and Hang Ho},
      title = {A Fast Computational Formula for Kappa Coefficient},
      journal = {Science Journal of Clinical Medicine},
      volume = {4},
      number = {1},
      pages = {1-3},
      doi = {10.11648/j.sjcm.20150401.11},
      url = {https://doi.org/10.11648/j.sjcm.20150401.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjcm.20150401.11},
      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.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - A Fast Computational Formula for Kappa Coefficient
    AU  - Loc Nguyen
    AU  - Hang Ho
    Y1  - 2015/01/12
    PY  - 2015
    N1  - https://doi.org/10.11648/j.sjcm.20150401.11
    DO  - 10.11648/j.sjcm.20150401.11
    T2  - Science Journal of Clinical Medicine
    JF  - Science Journal of Clinical Medicine
    JO  - Science Journal of Clinical Medicine
    SP  - 1
    EP  - 3
    PB  - Science Publishing Group
    SN  - 2327-2732
    UR  - https://doi.org/10.11648/j.sjcm.20150401.11
    AB  - 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.
    VL  - 4
    IS  - 1
    ER  - 

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Author Information
  • Sunflower Soft Company, Ho Chi Minh City, Vietnam

  • Vinh Long General Hospital, Vinh Long Province, Vietnam

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