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. 2011 Oct 13;61(4):535–542. doi: 10.1136/gutjnl-2011-300486

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Distribution of levels of Baron score among specialists in the phase 1 panel as a function of the level assigned by the central reader. Ten authors of this paper scored the severity of ulcerative colitis according to their standard practice in 16 videos selected randomly from a total of 24. A level (rating) of the Baron score was then assigned, based on their assessment of friability and this was compared with the level assigned by a central reader. (0= normal; 1=minor; 2=moderate; 3=severe endoscopic severity). n, total number of ratings by phase 1 panel; s, number of video sigmoidoscopies.