The intra- and inter-assessor reliability of measurement of functional outcome by lameness scoring in horses.

This study investigates the consistency of lameness scoring in horses, performed by veterinarians, and finds that while individual scoring varies between different assessors, overall global scoring of change in lameness is reliable.

Objective

The research paper’s objective was to assess the reliability of lameness scoring in horses. Lameness scoring is a common technique used by veterinarians to evaluate the severity of a horse’s leg or foot disorder. The aim was to determine the consistency (reliability) of these scores when given by the same person (intra-assessor reliability) and when given by different persons (inter-assessor reliability).

• The study included nineteen lame horses, and the gait of each horse was recorded on a camcorder.
• The horses were examined on four different occasions, and their lameness was scored on a scale of 0 to 10, 0 being sound (no lameness), and 10 being non-weight bearing lameness (severe lameness).
• In addition to individual lameness scores, an overall global score of change in lameness throughout the duration of the study was also calculated for each horse. This score indicated whether the condition of the horse improved, worsened, or remained the same.

Research Methods

To measure the intra-assessor reliability of lameness scoring, one veterinary surgeon viewed and scored the videotapes of the horses’ gaits on two separate occasions. This would highlight any variations in scores assigned by the same person at different times.

• Inter-assessor reliability was measured by having three different veterinary surgeons view the same videotapes. Each of them assigned individual lameness scores to the horses, as well as global scores. This allowed the researchers to evaluate the consistency in scores given by different individuals viewing the same data.

Findings

The results showed that the reliability of individual lameness scoring by the same person (intra-assessor) was satisfactory. However, reliability between different observers (inter-assessor) was just within the acceptable limit, indicating some discrepancies in their observations and scoring.

• Importantly, the global scoring of change in lameness throughout the study was found to be reliable, irrespective of who was assigning the scores. This suggests that global scoring, which reflects changes in a horse’s condition over time, might be a more reliable method of assessing lameness.

Significance

As lameness scoring is a common technique used to diagnose and monitor horse health, the findings of this study are important. The reliability of this scoring is fundamental to clinical studies and can influence the diagnosis and treatment of lameness in horses. The fact that global scoring was found to be more reliable suggests it might be a preferred method for tracking changes in horse lameness over a period of time.