more info on hips for those interested

[Denise Wall]

As a little more information to add to this study below:

 

The overall percentage of HD in 1994-1995 in films evaluated by OFA from 57,260 dogs of different breeds was 12.5%. This below study was done from 1991 - 1995, roughly the same time period. If one compares the 12.5% OFA HD stat to the 19.7% HD purebred stat from the below study, it's an indication of the difference in the actual percentages HD in dogs where the xray had not been prescreened for submission and the percentage of HD from those that were prescreened and submitted to OFA.

 

Of course this is only a rough comparison on purebred dogs in general, but it's better than no data. If this could be directly extrapolated to Border Collies, which it can't, it would put the actual affected rate for our breed more like one in five rather than the one in four we've estimated.

 

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Vet Radiol Ultrasound 2002 Jul-Aug;43(4):313-8

 

Prevalence of canine hip dysplasia in a veterinary teaching hospital population.

 

Rettenmaier JL, Keller GG, Lattimer JC, Corley EA, Ellersieck MR.

 

Veterinary Services, Columbia, MO 65201, USA.

 

The purpose of this study was to determine the prevalence of canine HD in a population in which there was minimal or no prior screening of radiographs for the disorder. Patient information was obtained from the radiographic database at the University of Missouri-Columbia Veterinary Teaching Hospital during the five-year period of 1991-1995. The coxofemoral joints on ventrodorsal radiographs of the pelvis were independently evaluated by three veterinary radiologists. A consensus evaluation of normal, borderline, or dysplastic was compiled. There were 2885 dogs identified representing 116 breeds and the mixbreds. There were 2236 purebred dogs (1071 males and 1165 females) and the prevalence of HD was 19.7%. There were 649 mixbred dogs (340 males and 309 females) and the prevalence of HD was 17.7%. There was no significant difference in the prevalence of HD between sexes or between purebred and mixbred dogs (P = 0.16; P = 0.29). Degenerative joint disease (DJD) was the most common radiographic manifestation of HD and there appeared to be a threshold at 12 months of age after which the presence of DJD was the primary diagnostic criteria.

 

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More to follow as time permits.

 

Denise