Minimal Clinically Important Differences for a Weight Distribution Platform in Dogs with Osteoarthritis

Area of Science:

• Veterinary Medicine
• Animal Biomechanics
• Canine Health

Background:

• Osteoarthritis (OA) is a common debilitating condition in dogs.
• Accurate assessment of treatment efficacy is crucial for improving canine quality of life.
• Evaluating static weight-bearing distribution is a key metric for monitoring OA progression and treatment response.

Purpose of the Study:

• To determine the optimal method for evaluating static weight-bearing distribution in dogs with osteoarthritis.
• To establish minimal clinically important differences for assessing treatment response using a weight distribution platform.
• To provide reliable metrics for research and clinical monitoring of canine OA.

Main Methods:

• Retrospective analysis of clinical records from 80 dogs with bilateral hip osteoarthritis.
• Data collected at baseline and 15 days post-treatment using a weight distribution platform.
• Calculation of minimal clinically important differences using distribution-based and anchor-based methods for deviation from normal weight-bearing and symmetry index (SI).

Main Results:

• Anchor-based methods yielded ranges of -0.3 to -3.1 for deviation and -10.0 to -23.9 for SI.
• Distribution-based methods yielded ranges of 0.16 to 0.29 for deviation and 1.31 to 2.88 for SI.
• Receiver operator characteristic curves indicated acceptable cut-off points (Area Under Curve >0.7), with proposed estimates of -1 for deviation and -10 for SI.

Conclusions:

• The study provides validated estimates for deviation and symmetry index to monitor treatment effectiveness in dogs with osteoarthritis.
• These metrics offer a reliable approach for both clinical patient monitoring and future research endeavors.
• Further research should expand to include osteoarthritis in other joints and a wider range of clinical cases.