Hip dysplasia is a hip socket abnormality that affects many large breed dogs. A review of medical records of dogs seen at 27 veterinary medical teaching hospitals found that hip dysplasia was more common in Golden Retrievers than in Border Collies; the data are shown in the following table. Calculate the relative risk of hip dysplasia for Golden Retrievers compared to Border Collies.

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Golden retriever Border collie 221 5,007 5,228 Hip Yes 3,995 dysplasia? No 42,946 Total 46,941