Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

You will find here:

that are used in radiology and related fields with free access.

Moreover:

  • Some pages are accompanied by illustrations
  • All pages contain tags for easy navigation
 

The concept

The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

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    Interobserver agreement - interpretation of kappa values, Cohen's kappa, Fleiss' kappa

    This table shows description of interobserver agreement intervals of cathegorical data expressed as kappa statistics. The main disadvantage of kappa statistics is that it assumes no natural ordering of the data. Therefore, such information is not fully taken advantage of.

    Kappa Interpretation
    <0 Poor agreement
    0.0 - 0.20 Slight agreement
    0.21 - 0.40 Fair agreement
    0.41 - 0.6 Moderate agreement
    0.61 - 0.8 Substantial agreement
    0.81 - 1.00 Almost perfect agreement

    References:

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

    Updated 17/8/2013 11:02 by Lambert
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