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Reliability of a beef cattle locomotion scoring system for use in clinical practice
Jay Tunstall1, Karin Mueller1, Oscar Sinfield1
1Department of Livestock and One Health, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Cheshire, UK.
Background:
Locomotion (lameness) scoring has been used and studied in the dairy industry; however, to the authors' knowledge, there are no studies assessing the reliability of locomotion scoring systems when used with beef cattle.
Methods:
A four-point scoring system was developed and beef cattle filmed walking on a firm surface. Eight veterinary researchers, eight clinicians and eight veterinary students were shown written descriptors of the scoring system and four video clips for training purposes, before being asked to score 40 video clips in a random order. Participants repeated this task 4 days later.
Results:
The intra-observer agreement (the same person scoring on different days) was acceptable with weighted mean Kappa values of 0.84, 0.81 and 0.84 respectively for researchers, clinicians and students. The inter-observer agreement (different people scoring the same animal) was acceptable with weighted Gwet's Agreement Coefficient values of 0.70, 0.69 and 0.64 for researchers, clinicians and students. Most disagreement occurred over scores one (not lame but imperfect locomotion) and two (lame, but not severe).
Conclusion:
This scoring system has the potential to reliably score lameness in beef cattle and help facilitate lameness treatment and control; however, some disagreements will occur especially over scores one and two.
