Inter-observer variability of two grading systems for equine glandular gastric disease.

Equine Veterinary Journal
Rose Tallon, M Hewetson

Abstract

Equine glandular gastric disease (EGGD) is recognised as a separate entity to equine squamous gastric disease (ESGD) and it is recommended that lesions are graded differently. Currently, no validated scoring system exists for EGGD. To determine inter-observer reliability of two previously described grading systems for EGGD and to assess if agreement improved with gastroscopy experience, specialist training or familiarity with the descriptive system. Cross-sectional survey. A link to an electronic questionnaire containing 20 images of glandular lesions was circulated. Respondents were asked to score lesions using descriptive terminology and a 0-2 verbal rating scale (VRS). Krippendorff's alpha reliability estimate was used to assess inter-rater agreement. A mixed effects model was used to determine which descriptive categories were associated with lesions being described as severe and decision to treat. Eighty-two veterinarians responded, 49 diplomates and 33 non-diplomates. There was no agreement when all four descriptive variables were combined (α = 0.19). Agreement was fair to moderate for severity (α = 0.52), distribution (α = 0.44), appearance (α = 0.38) and shape (α = 0.32). Agreement for the VRS was similar to that for se...Continue Reading

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