Breed, sex, and body weight as risk factors for rupture of the cranial cruciate ligament in young dogs

Julie M. Duval From the Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602 (Duval, Budsberg); the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824 (Flo); and the Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104 (Sammarco).

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Steven C. Budsberg From the Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602 (Duval, Budsberg); the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824 (Flo); and the Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104 (Sammarco).

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Gretchen L. Flo From the Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602 (Duval, Budsberg); the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824 (Flo); and the Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104 (Sammarco).

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Jill L. Sammarco From the Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602 (Duval, Budsberg); the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824 (Flo); and the Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104 (Sammarco).

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Objective

To describe clinical features of dogs < 2 years old with rupture of the cranial cruciate ligament (CCL) and to evaluate breed, sex, and body weight as risk factors.

Design

Case-control study.

Animals

201 dogs < 2 years old with rupture of the CCL and 804 age-matched control dogs.

Procedure

Medical records were reviewed for breed, sex, and body weight, and results were compared with results of age-matched control dogs.

Results

Breed predisposition was detected for Neapolitan Mastiff, Akita, Saint Bernard, Rottweiler, Mastiff, Newfoundland, Chesapeake Bay Retriever, Labrador Retriever, and American Staffordshire Terrier. Increased risk was detected for neutered males and neutered females, compared with sexually intact males and sexually intact females, respectively. Differences in prevalence of rupture of the CCL were not detected between all males and females, sexually intact males and sexually intact females, or neutered males and neutered females. Body weights of dogs with ruptured CCL were significantly greater than those of control dogs.

Conclusions and Clinical Relevance

Several large breeds of dogs are predisposed to rupture of the CCL at a young age. (J Am Vet Med Assoc 1999;215:811–814)

Objective

To describe clinical features of dogs < 2 years old with rupture of the cranial cruciate ligament (CCL) and to evaluate breed, sex, and body weight as risk factors.

Design

Case-control study.

Animals

201 dogs < 2 years old with rupture of the CCL and 804 age-matched control dogs.

Procedure

Medical records were reviewed for breed, sex, and body weight, and results were compared with results of age-matched control dogs.

Results

Breed predisposition was detected for Neapolitan Mastiff, Akita, Saint Bernard, Rottweiler, Mastiff, Newfoundland, Chesapeake Bay Retriever, Labrador Retriever, and American Staffordshire Terrier. Increased risk was detected for neutered males and neutered females, compared with sexually intact males and sexually intact females, respectively. Differences in prevalence of rupture of the CCL were not detected between all males and females, sexually intact males and sexually intact females, or neutered males and neutered females. Body weights of dogs with ruptured CCL were significantly greater than those of control dogs.

Conclusions and Clinical Relevance

Several large breeds of dogs are predisposed to rupture of the CCL at a young age. (J Am Vet Med Assoc 1999;215:811–814)

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