Annals of internal medicine
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Review Meta Analysis
The accuracy of the Ottawa knee rule to rule out knee fractures: a systematic review.
The Ottawa knee rule is a clinical decision aid that helps rule out fractures and avoid unnecessary radiography. ⋯ A negative result on an Ottawa knee rule test accurately excluded knee fractures after acute knee injury. However, because the rule is calibrated toward 100% sensitivity and actual fracture prevalences are usually low, large-scale, multicentered studies are still needed to establish the cost-effectiveness of routinely implementing the rule.