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Accuracy of Outerbridge and Berndt and Harty classification in ankle MRI. Accuracy of Outerbridge grading scale (black) and Berndt and Harty (B + H) classification system (grey) was evaluated by calculating the area under the receiver operating curve (AUC). Accuracy for the Outerbridge classification system was 84% (p = 0.002; 95% CI range 69–99) compared to 76% (p = 0.02; 95% CI range 57–94) for B + H classification system
