DI scores = (Left) 0.42 / (Right) 0.32
Interpretation
Distraction Index (DI):Right DI = 0.32, Left DI = 0.42. Osteoarthritis (OA):No radiographic evidence of OA for either hip. Cavitation/Other Findings:None.
Distraction Index (DI):The laxity ranking is based on the hip with the greater laxity (larger DI). In this case the DI used is 0.42.
OA Risk Category:The DI is between 0.31 and 0.49. This patient is at mild risk for hip OA. Distraction Index: Low Risk 0.0 0.2 ENGLISH SHEPHERD Mild Risk Moderate Risk DI = 0.42 0.4 0.6 Distraction Index High Risk 0.8 1.0 Breed Statistics:This interpretation is based on a cross-section of 424 Canine patients of the ENGLISH SHEPHERD breed in the AIS PennHIP database. The gray strip represents the central 90% range of DIs (0.26 - 0.76) for the breed. The breed average DI is 0.47. The patient DI is the solid circle (0.42). Summary:The degree of laxity (DI = 0.42) falls within the central 90% range of DIs for the breed. This amount of hip laxity places the hip at a mild risk to develop hip OA. No radiographic evidence of OA for either hip. Interpretation and Recommendations:No OA/Mild Risk: Low risk to develop radiographic evidence of hip OA early in life, however OA may manifest after 6 years of age or later. Risk of OA increases as DI, age, body weight, and activity level increase. OA susceptibility is breed specific, larger breeds being more susceptible.
These photos are the actual x-rays PennHip used for their evaluation/measurements. Click on each photo for a larger view.