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Vet Surg. 2014 Mar;43(3):247-54. doi: 10.1111/j.1532-950X.2014.12162.x. Epub 2014 Mar 11.

The Canine Orthopedic Index. Step 3: Responsiveness testing.

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  • 1Veterinary Clinical Investigations Center, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.



To determine whether the Canine Orthopedic Index (COI) can detect changes in dogs with osteoarthritis (OA) treated with either non-steroidal anti-inflammatory drugs (NSAID) or placebo.


Double blind randomized placebo controlled trial.


Dogs (n = 80) with OA.


Owners completed the COI on Day 0. Dogs were administered either carprofen or placebo on days 1 through 14. Owners completed the COI again on Day 14. The change in total instrument, stiffness, gait, function, and quality of life scores were assessed between groups.


Dogs administered carprofen had significant decreases in the total instrument score (P = .002) as well as 3 of the 4 factor scores compared to dogs treated with placebo (stiffness score P = .015; gait score P = .001; and function score = 0.008). The change in quality of life score was not significantly different between carprofen and placebo treated dogs (P = .124).


The COI delivered the decreases in total instrument, stiffness, gait, and function scores that one would expect in dogs with OA treated with an NSAID compared with placebo administration. In this cohort of dogs, the quality of life score was not sensitive to the changes associated with NSAID administration.

© Copyright 2014 by The American College of Veterinary Surgeons.

[PubMed - indexed for MEDLINE]
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