Effect of signalment on the presentation of canine patients suffering from cranial cruciate ligament disease.

Objective: To determine the effect of signalment on the incidence and presentation of patients suffering from cranial cruciate ligament disease. Methods: Data relating to 426 dogs (44 breeds) that met specific selection criteria were obtained from the hospital archive (2002 to 2008). Cases were followed up for 2 years. Results: The breeds most commonly presented with cranial cruciate ligament disease were Labrador retriever (16%), Rottweiler (15%), golden retriever (12%) and boxer (9%). Rottweilers were significantly more likely (69%; P=0•05) to develop and present with (50%; P=0•03) bilateral cranial cruciate ligament disease. Rottweilers presenting with cranial cruciate ligament disease were significantly younger (median 977 days; P<0•0001) than other breeds; golden retrievers being significantly older at presentation (median 1994 days; P=0•004). Neither sex nor neutered status significantly affected the incidence of developing (P=0•77 and P=0•30, respectively) or presenting with (P=0•62 and P=0•35, respectively) bilateral cranial cruciate ligament disease. Entire dogs were significantly younger than neutered dogs at presentation (P=0•0004). Entire female dogs presented significantly younger than neutered females (P=0•0002), entire males (P=0•01) and neutered males (P=0•0001). Clinical Significance: Breed affects the incidence of developing and presenting with bilateral cranial cruciate ligament disease. Breed and sex both affect the age that patients present with cranial cruciate ligament disease.