{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T09:13:08Z","timestamp":1783415588660,"version":"3.54.6"},"reference-count":37,"publisher":"Oxford University Press (OUP)","issue":"1","license":[{"start":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T00:00:00Z","timestamp":1770076800000},"content-version":"vor","delay-in-days":1859,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2020,12,7]],"date-time":"2020-12-07T00:00:00Z","timestamp":1607299200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,1,1]]},"abstract":"Abstract<\/jats:title>\n \n Background<\/jats:title>\n Grading of equine gastric ulcer syndrome (EGUS) is undertaken in clinical and research settings, but the reliability of EGUS grading systems is poorly understood.<\/jats:p>\n <\/jats:sec>\n \n Hypothesis\/Objectives<\/jats:title>\n Investigate interobserver and intraobserver reliability of an established ordinal grading system and a novel visual analog scale (VAS), and assess the influence of observer experience.<\/jats:p>\n <\/jats:sec>\n \n Animals<\/jats:title>\n Sixty deidentified gastroscopy videos.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Six observers (3 specialists and 3 residents) graded videos using the EGUS Council (EGUC) system and VAS. Observers graded the videos three 3 for each system, using a cross-over design with at least 1\u2009week between each phase. The order of videos was randomized for each phase.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n Interobserver and intraobserver reliability were estimated using Gwet's agreement coefficient with ordinal weights applied (AC2) for the EGUC system and the intraclass correlation coefficient (ICC) for the VAS.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n Using the EGUC system, interobserver reliability was substantial for squamous (AC2 = 0.69; 95% confidence interval [CI], 0.57-0.80) and glandular mucosa (AC2 = 0.72; 95% CI, 0.70-0.75), and intraobserver reliability was substantial for squamous (AC2 = 0.80; 95% CI, 0.71-0.90) and glandular mucosa (AC2 = 0.80; 95% CI, 0.74-0.86). Interobserver reliability using the VAS was moderate for squamous (ICC = 0.64; 95% CI, 0.31-0.96) and poor for glandular mucosa (ICC = 0.35; 95% CI, 0.06-0.64), and intraobserver reliability was moderate for squamous (ICC = 0.74; 95% CI, 0.62-0.86) and glandular mucosa (ICC = 0.56; 95% CI, 0.39-0.72).<\/jats:p>\n <\/jats:sec>\n \n Conclusions and Clinical Importance<\/jats:title>\n The EGUC system had acceptable intraobserver and interobserver reliability and performed well regardless of observer experience. Familiarity and observer experience improved reliability of the VAS.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/jvim.15987","type":"journal-article","created":{"date-parts":[[2020,12,7]],"date-time":"2020-12-07T11:01:02Z","timestamp":1607338862000},"page":"571-579","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Interobserver and intraobserver reliability for 2 grading systems for gastric ulcer syndrome in horses"],"prefix":"10.1093","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3483-9384","authenticated-orcid":false,"given":"Jessica C.","family":"Wise","sequence":"first","affiliation":[{"name":"School of Animal and Veterinary Sciences, Charles Sturt University , Wagga Wagga, New South Wales,","place":["Australia"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8410-5894","authenticated-orcid":false,"given":"Edwina 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