Cohen's KappaClinical

A statistic that measures agreement between two raters beyond what chance alone would produce.

Cohen's Kappa quantifies inter-rater reliability for categorical ratings (e.g., two clinicians independently classifying the same movement fault or imaging finding), correcting for the agreement expected by chance. Values typically range from 0 (agreement no better than chance) to 1 (perfect agreement), with common but non-universal benchmarks labelling 0.60-0.80 as substantial and above 0.80 as near-perfect; these cutoffs are conventional rather than statistically derived, so interpret alongside prevalence and the number of categories, as kappa can be misleadingly low when one category is rare.

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This guide was auto-drafted and is pending editorial review.