Volume 144, Issue 1, Pages 81-91 (January 2013) Real-Time Optical Biopsy of Colon Polyps With Narrow Band Imaging in Community Practice Does Not Yet Meet Key Thresholds for Clinical Decisions  Uri Ladabaum, Ann Fioritto, Aya Mitani, Manisha Desai, Jane P. Kim, Douglas K. Rex, Thomas Imperiale, Naresh Gunaratnam  Gastroenterology  Volume 144, Issue 1, Pages 81-91 (January 2013) DOI: 10.1053/j.gastro.2012.09.054 Copyright © 2013 AGA Institute Terms and Conditions

Figure 1 Ex vivo test scores before and after completion of a computerized learning module. Scores improved for 10 of the 11 subjects who submitted complete pretest and posttest results data, and 12 of 13 subjects who submitted posttest results scored >90% accuracy on the posttest. The top line represents 2 subjects who had a pretest score of 96% and a posttest score of 100%. Gastroenterology 2013 144, 81-91DOI: (10.1053/j.gastro.2012.09.054) Copyright © 2013 AGA Institute Terms and Conditions

Figure 2 Learning curves as a function of performance on nonoverlapping batches of 20 consecutive polyps per endoscopist assessed with high confidence. There was considerable batch-to-batch variation, which was more pronounced for individual participants than for the group mean overall and for specificity compared with sensitivity. There was no clear pattern of early learning with later stabilization of performance at a higher level. (A) Accuracy, (B) sensitivity, and (C) specificity for diminutive polyps. (D) Accuracy, (E) sensitivity, and (F) specificity for diminutive and small polyps combined. Each participant is represented by a different color. The group average is superimposed in red. Gastroenterology 2013 144, 81-91DOI: (10.1053/j.gastro.2012.09.054) Copyright © 2013 AGA Institute Terms and Conditions

Figure 3 Learning curves as a function of performance on nonoverlapping batches of 20 consecutive polyps per endoscopist assessed with high or low confidence. There was considerable batch-to-batch variation, which was more pronounced for individual participants than for the group mean overall and for specificity compared with sensitivity. There was no clear pattern of early learning with later stabilization of performance at a higher level. (A) Accuracy, (B) sensitivity, and (C) specificity for diminutive polyps. (D) Accuracy, (E) sensitivity, and (F) specificity for diminutive and small polyps combined. Each participant is represented by a different color. The group average is superimposed in red. Gastroenterology 2013 144, 81-91DOI: (10.1053/j.gastro.2012.09.054) Copyright © 2013 AGA Institute Terms and Conditions