Peer-reviewed veterinary case report
Hip dysplasia causes hind leg lameness in 8.5% of Boxers by age 8
By van Hagen, Marjan A E et al.·Published in American journal of veterinary research·2005·Department of Clinical Sciences of Companion Animals, Netherlands·View original on PubMed →
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Original publication title: Incidence, risk factors, and heritability estimates of hind limb lameness caused by hip dysplasia in a birth cohort of boxers.
- Species:
- dog
Plain-English summary
A group of 1,733 Boxers was studied over eight years to understand how often they develop hind limb lameness due to hip dysplasia. The research found that dogs living on slippery floors were more likely to develop this condition, as were those from litters with high puppy mortality rates. Neutering at six months also increased the risk. Overall, about 8.5% of the dogs showed signs of hip dysplasia by the time they were eight years old. This information can help breeders make better choices to reduce the risk of hip dysplasia in future litters.
People also search for: Boxer dog limping · hip dysplasia risk factors in dogs · neutering Boxer puppies effects · slippery floors and dog health
Abstract
OBJECTIVE: To determine incidence, risk factors, and heritability estimates of hind limb lameness caused by hip dysplasia in a birth cohort of Boxers. ANIMALS: 1733 Boxers from 325 litters. PROCEDURE: Status of Boxers with respect to clinical signs of canine hip dysplasia (cCHD) was registered during an 8-year period. Survival analysis accounted for dogs lost to follow-up. Effective heritability for developing cCHD was estimated by use of a proportional hazard model on the basis of the Weibull distribution. Parametric survival models were developed to identify the influence of potential risk factors. RESULTS: Cumulative hazard rate for cCHD from 7 weeks to 8 years of age was 8.5%. Dogs that were kept on a floor covered with a slippery material were 1.6 times as likely to develop cCHD, compared with dogs kept on a nonslippery floor. Risk of cCHD doubled in dogs from litters with a high preweaning mortality rate. Dogs that were neutered at 6 months prior to a diagnosis of CHD were 1.5 times as likely to develop cCHD, compared with sexually intact dogs. Dogs >5 years of age were 1.8 times as likely to develop cCHD, compared with younger dogs. Estimated effective heritability of cCHD was 0.11. In terms of the risk of cCHD in progeny, mean estimated breeding value (EBV) of the 10 best and 10 worst sires was -0.32 and 0.42, respectively. CONCLUSIONS AND CLINICAL RELEVANCE: Registration of Boxers that develop cCHD may provide a strategy for disease prevention. In addition to diagnostic evaluation of radiographs, sire EBVs provide useful information for breeding selection decisions.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/15757132/