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. 2017:2017:5723476.
doi: 10.1155/2017/5723476. Epub 2017 Mar 12.

The Demographics of Canine Hip Dysplasia in the United States and Canada

Randall T Loder  1 , Rory J Todhunter  2
Affiliations

The Demographics of Canine Hip Dysplasia in the United States and Canada

Randall T Loder et al. J Vet Med. 2017.

Abstract

Canine hip dysplasia (CHD) is a common problem in veterinary medicine. We report the demographics of CHD using the entire hip dysplasia registry from the Orthopedic Foundation for Animals, analyzing differences by breed, sex, laterality, seasonal variation in birth, and latitude. There were 921,046 unique records. Each dog was classified using the American Kennel Club (AKC) and Fédération Cynologique Internationale (FCI) systems. Statistical analysis was performed with bivariate and logistic regression procedures. The overall CHD prevalence was 15.56%. The OR for CHD was higher in females (1.05), those born in spring (1.14) and winter (1.13), and those in more southern latitudes (OR 2.12). Within AKC groups, working dogs had the highest risk of CHD (OR 1.882) with hounds being the reference group. Within FCI groups, the pinscher/molossoid group had the highest risk of CHD (OR 4.168) with sighthounds being the reference group. The similarities between CHD and DDH are striking. Within DDH there are two different types, the typical infantile DDH and the late onset adolescent/adult acetabular dysplasia, with different demographics; the demographics of CHD are more similar to the later onset DDH group. Comparative studies of both disorders should lead to a better understanding of both CHD and DDH.

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Figures

Figure 1
Figure 1
Prevalence of CHD by various demographic parameters. (a) By season of birth. (b) By latitude. (c) By AKC groups. (d) By FCI groups. (e) By age at time of radiograph. The numbers in the boxes are the percentage within each column bar.
Figure 2
Figure 2
Unilateral and bilateral involvement in CHD. (a) By AKC group. (b) By FCI group.
See this image and copyright information in PMC

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