Relationship Between Objective and Subjective Assessment of Limb Function in Normal Dogs with an Experimentally Induced Lameness
Article first published online: 3 APR 2008
© Copyright 2008 by The American College of Veterinary Surgeons
Volume 37, Issue 3, pages 241–246, April 2008
How to Cite
WAXMAN, A. S., ROBINSON, D. A., EVANS, R. B., HULSE, D. A., INNES, J. F. and CONZEMIUS, M. G. (2008), Relationship Between Objective and Subjective Assessment of Limb Function in Normal Dogs with an Experimentally Induced Lameness. Veterinary Surgery, 37: 241–246. doi: 10.1111/j.1532-950X.2008.00372.x
- Issue published online: 3 APR 2008
- Article first published online: 3 APR 2008
- Submitted August 2007; Accepted December 2007
Objective— To evaluate the relationship between previously used subjective and objective measures of limb function in normal dogs that had an induced lameness.
Study Design— Prospective, blinded, and induced animal model trial.
Animals— Normal, adult, and mixed-breed dogs (n=24) weighing 25–35 kg.
Methods— Force platform gait analysis was collected in all dogs before and after induction of lameness. All gait trials were videotaped; 60 video trials were evaluated by 3 surgeons with practice limited to small animal orthopedics and 3 first year veterinary students in an effort to establish the relationship between subjective and objective measures of lameness. Evaluators were unaware of the force platform data.
Results— Concordance coefficients were low for all observers and were similar between students and surgeons. These values were further decreased when normal and non-weight bearing trials were removed. Agreement with the force platform data was low even when observers only had to be within ±10% of the ground reaction forces. When repeat trials were evaluated surgeons had a much higher repeatability compared with students.
Conclusions— Subjective evaluation of the lameness in this study varied greatly between observers and agreed poorly with objective measures of limb function.
Clinical Relevance— Subjective evaluation of gait should be interpreted cautiously as an outcome measure whether performed from a single or from multiple observers.