Use of a short educational video to improve the accuracyof colorectal polyp morphology assessment: A multicenterrandomized controlled study

Objectives: Although accurate assessment of polyp morphology helps endoscopists select the appropriate management for colorectal polyps, some studies have reported unsatisfactory accuracy in such assessment. This study aimed to clarify the usefulness of a short educational video available on the Internet for accurate polyp morphology assessment. Methods: This was a multicenter randomized controlled trial. Participants were randomly assigned to the pre- or post-education groups after a pre-test comprising images of 42 polyps, including 12 laterally spreading tumors. Participants who scored ≥ 80% on the pre-test were excluded. Only the post-education group completed the diagnostic test after watching an online educational video. The primary outcome was the difference in diagnostic accuracy between the pre-test and diagnostic tests for each group. Results: Of the 296 endoscopists enrolled from 48 institutions, 34 missed the test deadline, and 29 who scored ≥ 80% in the pre-test were excluded. The primary outcome analysis sets were 117 and 116 in the pre- and post-education groups, respectively. The mean pre-test accuracies in the pre-education and post-education groups were 60.6% and 60.7%, respectively. The difference in diagnostic accuracy between the pre-test and diagnostic test was significantly higher in the post-education than the pre-education group (12.0 points, 95% confidence interval [CI] 9.9–14.1 and 2.3 points, 95% CI 0.9–3.6; p < 0.001). Conclusion: This multicenter randomized controlled trial demonstrated the usefulness of a short educational video for accurate polyp morphology assessment.