AI Article Synopsis
- Observer reliability studies for fracture classification use Cohen's κ and absolute agreement to measure agreement among observers.
- Cohen's κ ranges from 0 (no agreement) to 1 (perfect agreement), while absolute agreement indicates the percentage of times observers agree.
- The Kappa Paradox occurs when studies report high absolute agreement alongside low κ values, and the article aims to explain this phenomenon and provide guidance to recognize and avoid it.
Article Abstract
Observer reliability studies for fracture classification systems evaluate agreement using Cohen's κ and absolute agreement as outcome measures. Cohen's κ is a chance-corrected measure of agreement and can range between 0 (no agreement) and 1 (perfect agreement). Absolute agreement is the percentage of times observers agree on the matter they have to rate. Some studies report a high-absolute agreement but a relatively low κ value, which is counterintuitive. This phenomenon is referred to as the Kappa Paradox. The objective of this article was to explain the statistical phenomenon of the Kappa Paradox and to help readers and researchers to recognize and prevent this phenomenon.
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| http://dx.doi.org/10.1016/j.jhsa.2024.01.006 | DOI Listing |
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