Performance of the Montreal classification for inflammatory bowel diseases

Table 5 Inter-rater agreement kappa for all items of all categories of Montreal classification

Item Montreal classification	Overall kappa
Age of onset	0.67 (n = 28)
Diagnosis	0.96 (n = 28)
CD disease localization	0.82 (n = 28)
CD upper gastrointestinal	0.62 (n = 28)
CD perianal disease	0.91 (n = 28)
CD disease behavior	0.79 (n = 26)
CD severity (mild, moderate, severe)	0.44 (n = 24)
UC disease extent	0.65 (n = 21)
UC disease severity colitis	0.23 (n = 20)
EIM	0.68 (n = 28)

Observers were only included if they scored at least one item in all case-vignettes. EIM: Extra-intestinal manifestations; CD: Crohn’s disease; UC: Ulcerative colitis.