de Lange 2004.

Methods	30 second video clips (N = 5) of ulcerative colitis were shown to an audience of experienced (n = 15) and inexperienced (n = 21) endoscopists on a high resolution video projector Both groups were asked to assess eight endoscopic features and the overall mucosal inflammation on the Visual Analogue Scale
Data	The 15 experienced gastroenterologists had performed > 750 endoscopies The 21 inexperienced gastroenterologists had performed < 200 endoscopies
Comparisons	Inter‐observer reliability
Outcomes	See Table 3
Notes	Endoscopic Scoring Index evaluated: EAI
Risk of bias
Item	Authors' judgement	Description
Blinding?	Unclear	Not adequately described
Independent Observation?	Unclear	The ratings were performed in the same room based on a projection. It is unclear whether this may have affected scoring