Narrow band imaging evaluation of duodenal villi in patients with and without celiac disease: A prospective study

Figure 1 Study overview and flow diagram. A total of 112 patients were included in the study, all of whom underwent esophagoduodenoscopy with duodenal biopsies and duodenal narrow band imaging (NBI) evaluation by a staff endoscopist. Duodenal villi were scored as normal, partial atrophy, and complete atrophy based on real-time NBI appearance by the performing staff endoscopist, and representative duodenal NBI images were scored post-procedure using the same scoring convention by an advanced endoscopist and a gastroenterology fellow in a masked fashion. Duodenal biopsies were evaluated by an experienced pathologist in a masked fashion and compared with NBI scores.