Summary: Use of the Ottawa Ankle Rules (OAR) for ankle injury in children may allow 25% more children to avoid the costs or radiation exposure associated with imaging, with out any increase in the rate of missed fracture. (In other words, using the OAR to exclude ankle and mid-foot fractures in children may reduce imaging use by approximately 25% with a low likelihood of missing a fracture.)

http://www.ncbi.nlm.nih.gov/m/pubmed/19187397/

Strength of Recommendation = B

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